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Onuma K, Watanabe M, Sasaki N. The grimace scale: a useful tool for assessing pain in laboratory animals. Exp Anim 2024; 73:234-245. [PMID: 38382945 PMCID: PMC11254488 DOI: 10.1538/expanim.24-0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 02/13/2024] [Indexed: 02/23/2024] Open
Abstract
Accurately and promptly assessing pain in experimental animals is extremely important to avoid unnecessary suffering of the animals and to enhance the reproducibility of experiments. This is a key concern for veterinarians, animal caretakers, and researchers from the perspectives of veterinary care and animal welfare. Various methods including ethology, immunohistochemistry, electrophysiology, and molecular biology are used for pain assessment. However, the grimace scale, which was developed by taking cues from interpreting pain through facial expressions of non-verbal infants, has become recognized as a very simple and practical method for objectively evaluating pain levels by scoring changes in an animal's expressions. This method, which was first implemented with mice approximately 10 years ago, is now being applied to various experimental animals and is widely used in research settings. This review focuses on the usability of the grimace scale from the "cage-side" perspective, aiming to make it a more user-friendly tool for those involved in animal experiments. Differences in facial expressions in response to pain in various animals, examples of applying the grimace scale, current automated analytical methods, and future prospects are discussed.
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Affiliation(s)
- Kenta Onuma
- Laboratory of Laboratory Animal Science and Medicine, School of Veterinary Medicine, Kitasato University, 35-1 Higashi-23, Towada, Aomori 034-0021, Japan
| | - Masaki Watanabe
- Laboratory of Laboratory Animal Science and Medicine, School of Veterinary Medicine, Kitasato University, 35-1 Higashi-23, Towada, Aomori 034-0021, Japan
| | - Nobuya Sasaki
- Laboratory of Laboratory Animal Science and Medicine, School of Veterinary Medicine, Kitasato University, 35-1 Higashi-23, Towada, Aomori 034-0021, Japan
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2
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Tse YT, Miller CV, Pittman M. Morphological disparity and structural performance of the dromaeosaurid skull informs ecology and evolutionary history. BMC Ecol Evol 2024; 24:39. [PMID: 38622512 PMCID: PMC11020771 DOI: 10.1186/s12862-024-02222-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/11/2024] [Indexed: 04/17/2024] Open
Abstract
Non-avialan theropod dinosaurs had diverse ecologies and varied skull morphologies. Previous studies of theropod cranial morphology mostly focused on higher-level taxa or characteristics associated with herbivory. To better understand morphological disparity and function within carnivorous theropod families, here we focus on the Dromaeosauridae, 'raptors' traditionally seen as agile carnivorous hunters.We applied 2D geometric morphometrics to quantify skull shape, performed mechanical advantage analysis to assess the efficiency of bite force transfer, and performed finite element analysis to examine strain distribution in the skull during biting. We find that dromaeosaurid skull morphology was less disparate than most non-avialan theropod groups. Their skulls show a continuum of form between those that are tall and short and those that are flat and long. We hypothesise that this narrower morphological disparity indicates developmental constraint on skull shape, as observed in some mammalian families. Mechanical advantage indicates that Dromaeosaurus albertensis and Deinonychus antirrhopus were adapted for relatively high bite forces, while Halszkaraptor escuilliei was adapted for high bite speed, and other dromaeosaurids for intermediate bite forces and speeds. Finite element analysis indicates regions of high strain are consistent within dromaeosaurid families but differ between them. Average strain levels do not follow any phylogenetic pattern, possibly due to ecological convergence between distantly-related taxa.Combining our new morphofunctional data with a re-evaluation of previous evidence, we find piscivorous reconstructions of Halszkaraptor escuilliei to be unlikely, and instead suggest an invertivorous diet and possible adaptations for feeding in murky water or other low-visibility conditions. We support Deinonychus antirrhopus as being adapted for taking large vertebrate prey, but we find that its skull is relatively less resistant to bite forces than other dromaeosaurids. Given the recovery of high bite force resistance for Velociraptor mongoliensis, which is believed to have regularly engaged in scavenging behaviour, we suggest that higher bite force resistance in a dromaeosaurid taxon may reflect a greater reliance on scavenging rather than fresh kills.Comparisons to the troodontid Gobivenator mongoliensis suggest that a gracile rostrum like that of Velociraptor mongoliensis is ancestral to their closest common ancestor (Deinonychosauria) and the robust rostra of Dromaeosaurus albertensis and Deinonychus antirrhopus are a derived condition. Gobivenator mongoliensis also displays a higher jaw mechanical advantage and lower resistance to bite force than the examined dromaeosaurids, but given the hypothesised ecological divergence of troodontids from dromaeosaurids it is unclear which group, if either, represents the ancestral condition. Future work extending sampling to troodontids would therefore be invaluable and provide much needed context to the origin of skull form and function in early birds. This study illustrates how skull shape and functional metrics can discern non-avialan theropod ecology at lower taxonomic levels and identify variants of carnivorous feeding.
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Affiliation(s)
- Yuen Ting Tse
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Case Vincent Miller
- Department of Earth Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Michael Pittman
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
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3
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Smith HF, Felix MA, Rocco FA, Lynch LM, Valdez D. Adaptations to sociality in the mimetic and auricular musculature of the African wild dog (Lycaon pictus). Anat Rec (Hoboken) 2024. [PMID: 38597113 DOI: 10.1002/ar.25441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 02/28/2024] [Accepted: 03/27/2024] [Indexed: 04/11/2024]
Abstract
The African wild dog (Lycaon pictus) is a highly social canid that engages in sophisticated, coordinated group hunting tactics to procure large game. It is one of the most effective hunters of the African savannah, due to its highly developed communication methods. It also has large, mobile ears which enhance its auditory capabilities while hunting and assist with thermoregulation. Recent research suggested that certain muscles of facial expression, particularly those involved with expressive eyebrow movement, evolved solely in domestic dogs (Canis familiaris) to facilitate communication with their human owners. However, it is unclear whether highly social wild canid species may also employ similar expressive eye communication. We performed detailed dissections of an adult male L. pictus to evaluate and describe its mimetic and auricular musculature. Overall, L. pictus has well-developed facial and ear muscles. Musculi levator anguli oculi medialis (LAOM) and retractor anguli oculi lateralis (RAOL), mimetic muscles of hypothesized importance in domestic dog-human non-verbal communication, are enlarged in L. pictus, comparable in size to those of domestic dogs, as is m. orbicularis oculi. This morphology suggests that ocular facial expressions contribute to within-pack communication in wild dogs and are not unique to domestic dogs. The auricular muscles of L. pictus are well-developed, supporting greater leverage and fine manipulation of its large, mobile ears. These muscular adaptations facilitate the highly social ecology of African wild dogs and challenge current interpretations about the unique nature of domestic dog facial expressions.
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Affiliation(s)
- Heather F Smith
- Department of Anatomy, Midwestern University, Glendale, Arizona, USA
- College of Veterinary Medicine, Midwestern University, Glendale, Arizona, USA
- School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, USA
| | - Mia A Felix
- College of Veterinary Medicine, Midwestern University, Glendale, Arizona, USA
| | - Felicia A Rocco
- College of Veterinary Medicine, Midwestern University, Glendale, Arizona, USA
| | - Leigha M Lynch
- Department of Anatomy, Midwestern University, Glendale, Arizona, USA
| | - Dominik Valdez
- Department of Anatomy, Midwestern University, Glendale, Arizona, USA
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4
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Scott L, Florkiewicz BN. Feline faces: Unraveling the social function of domestic cat facial signals. Behav Processes 2023; 213:104959. [PMID: 37858844 DOI: 10.1016/j.beproc.2023.104959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 10/12/2023] [Accepted: 10/15/2023] [Indexed: 10/21/2023]
Abstract
Lately, there has been a growing interest in studying domestic cat facial signals, but most of this research has centered on signals produced during human-cat interactions or pain. The available research on intraspecific facial signaling with domesticated cats has largely focused on non-affiliative social interactions. However, the transition to intraspecific sociality through domestication could have resulted in a greater reliance on affiliative facial signals that aid with social bonding. Our study aimed to document the various facial signals that cats produce during affiliative and non-affiliative intraspecific interactions. Given the close relationship between the physical form and social function of mammalian facial signals, we predicted that affiliative and non-affiliative facial signals would have noticeable differences in their physical morphology. We observed the behavior of 53 adult domestic shorthair cats at CatCafé Lounge in Los Angeles, CA. Using Facial Action Coding Systems designed for cats, we compared the complexity and compositionality of facial signals produced in affiliative and non-affiliative contexts. To measure complexity and compositionality, we examined the number and types of facial muscle movements (AUs) observed in each signal. We found that compositionality, rather than complexity, was significantly associated with the social function of intraspecific facial signals. Our findings indicate that domestication likely had a significant impact on the development of intraspecific facial signaling repertoires in cats.
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Affiliation(s)
- Lauren Scott
- School of Medicine, University of Kansas Medical Center, KS, USA
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5
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Rotenstreich L, Marom A. "Untying the knot": The primitive orofacial muscle architecture in the gorilla (Gorilla gorilla) as a key to the evolution of hominin facial movement. FASEB J 2023; 37:e23137. [PMID: 37566489 DOI: 10.1096/fj.202300927r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/18/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023]
Abstract
The anatomical underpinnings of primate facial expressions are essential to exploring their evolution. Traditionally, it has been accepted that the primate face exhibits a "scala natura" morphocline, ranging from primitive to derived characteristics. At the primitive end, the face consists of undifferentiated muscular sheets, while at the derived end there is greater complexity with more muscles and insertion points. Among these, the role of the human modiolus ("knoten" in German) has been emphasized. Recent studies have challenged this view by revealing significant complexity in the faces of several non-human primates, thereby rejecting the linear notion of facial evolution. However, our knowledge of the facial architecture in gorillas, the second closest living relatives to modern humans, remains a significant gap in the literature. Here, we present new findings based on dissection and histological analysis of one gorilla craniofacial specimen, alongside 30 human hemifaces. Our results indicate that while the number and overall arrangement of facial muscles in the gorilla are comparable to those of chimpanzees and modern humans, several orofacial features distinguish the gorilla's anatomy from that of hominins. Among these are the absence of a modiolus, the continuity of muscular fibers over the region of the mouth corner, the flat (uncurving) sheet of the orbicularis oris muscle, and the insertion of direct labial tractors both anterior and posterior to it. Collectively, the anatomical characteristics observed in the gorilla suggest that the complex anatomy of the hominin face should be considered synapomorphic (shared-derived) within the Pan-Homo clade.
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Affiliation(s)
- Liat Rotenstreich
- Anatomy and Human Evolution Laboratory, The Farkas Family Center for Anatomical Research and Education (CARE), Department of Anatomy, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| | - Assaf Marom
- Anatomy and Human Evolution Laboratory, The Farkas Family Center for Anatomical Research and Education (CARE), Department of Anatomy, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
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6
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Vaill M, Kawanishi K, Varki N, Gagneux P, Varki A. Comparative physiological anthropogeny: exploring molecular underpinnings of distinctly human phenotypes. Physiol Rev 2023; 103:2171-2229. [PMID: 36603157 PMCID: PMC10151058 DOI: 10.1152/physrev.00040.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/26/2022] [Accepted: 12/28/2022] [Indexed: 01/06/2023] Open
Abstract
Anthropogeny is a classic term encompassing transdisciplinary investigations of the origins of the human species. Comparative anthropogeny is a systematic comparison of humans and other living nonhuman hominids (so-called "great apes"), aiming to identify distinctly human features in health and disease, with the overall goal of explaining human origins. We begin with a historical perspective, briefly describing how the field progressed from the earliest evolutionary insights to the current emphasis on in-depth molecular and genomic investigations of "human-specific" biology and an increased appreciation for cultural impacts on human biology. While many such genetic differences between humans and other hominids have been revealed over the last two decades, this information remains insufficient to explain the most distinctive phenotypic traits distinguishing humans from other living hominids. Here we undertake a complementary approach of "comparative physiological anthropogeny," along the lines of the preclinical medical curriculum, i.e., beginning with anatomy and considering each physiological system and in each case considering genetic and molecular components that are relevant. What is ultimately needed is a systematic comparative approach at all levels from molecular to physiological to sociocultural, building networks of related information, drawing inferences, and generating testable hypotheses. The concluding section will touch on distinctive considerations in the study of human evolution, including the importance of gene-culture interactions.
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Affiliation(s)
- Michael Vaill
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California
| | - Kunio Kawanishi
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California
- Department of Experimental Pathology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Nissi Varki
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California
- Department of Pathology, University of California, San Diego, La Jolla, California
| | - Pascal Gagneux
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California
- Department of Pathology, University of California, San Diego, La Jolla, California
| | - Ajit Varki
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla, California
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California
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7
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Tomberg C, Petagna M, de Selliers de Moranville LA. Horses (Equus caballus) facial micro-expressions: insight into discreet social information. Sci Rep 2023; 13:8625. [PMID: 37244937 DOI: 10.1038/s41598-023-35807-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 05/24/2023] [Indexed: 05/29/2023] Open
Abstract
Facial micro-expressions are facial expressions expressed briefly (less than 500 ms) and involuntarily. Described only in humans, we investigated whether micro-expressions could also be expressed by non-human animal species. Using the Equine Facial action coding system (EquiFACS), an objective tool based on facial muscles actions, we demonstrated that a non-human species, Equus caballus, is expressing facial micro-expressions in a social context. The AU17, AD38 and AD1 were selectively modulated as micro-expression-but not as standard facial expression (all durations included)-in presence of a human experimenter. As standard facial expressions, they have been associated with pain or stress but our results didn't support this association for micro-expressions which may convey other information. Like in humans, neural mechanisms underlying the exhibit of micro-expressions may differ from those of standard facial expressions. We found that some micro-expressions could be related to attention and involved in the multisensory processing of the 'fixed attention' observed in horses' high attentional state. The micro-expressions could be used by horses as social information in an interspecies relationship. We hypothesize that facial micro-expressions could be a window on transient internal states of the animal and may provide subtle and discreet social signals.
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Affiliation(s)
- Claude Tomberg
- Faculty of Medicine, Université Libre de Bruxelles, 808, Route de Lennik, CP 630, 1070, Brussels, Belgium.
| | - Maxime Petagna
- Faculty of Medicine, Université Libre de Bruxelles, 808, Route de Lennik, CP 630, 1070, Brussels, Belgium
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8
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The Association Between the Bared-Teeth Display and Social Dominance in Captive Chimpanzees ( Pan troglodytes). AFFECTIVE SCIENCE 2022; 3:749-760. [PMID: 36217408 PMCID: PMC9535227 DOI: 10.1007/s42761-022-00138-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 06/26/2022] [Indexed: 11/25/2022]
Abstract
Humans use smiles - widely observed emotional expressions - in a variety of social situations, of which the meaning varies depending on social relationship and the context in which it is displayed. The homologue of the human smile in non-human primates - both due to morphological and functional similarities - is the bared-teeth display (BT). According to the power asymmetry hypothesis (PAH), species with strict linear dominance hierarchies are predicted to produce distinct communicative signals to avoid escalations of social conflicts. Hence, while the BT in a despotic species is predicted to be expressed from low- to high-ranking individuals, signaling submission, the BT in a tolerant species is predicted to be expressed in multiple contexts, regardless of rank. We tested this hypothesis in a group of 8 captive chimpanzees (Pan troglodytes), a species commonly characterized as rather despotic. An investigation of 11,774 dyadic social interactions revealed this chimpanzee group to have a linear dominance hierarchy, with moderate steepness. A Bayesian GLMM - used to test the effects of social contexts and rank relationships of dyads on the use of the BT display - indicated multi-contextual use of the BT which is contingent on the rank relationship. We also found that slight morphological and/or acoustic variants (i.e., silent bared-teeth and vocalized bared-teeth) of the BT display may have different communicative meanings. Our findings are in line with the prediction derived from the PAH for a moderately despotic species, and the view that the human smile originated from the primate BT display. Supplementary Information The online version contains supplementary material available at 10.1007/s42761-022-00138-1.
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9
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Vlaeyen JMR, Heesen R, Kret ME, Clay Z, Bionda T, Kim Y. Bared-teeth displays in bonobos (Pan paniscus): An assessment of the power asymmetry hypothesis. Am J Primatol 2022; 84:e23419. [PMID: 35848310 DOI: 10.1002/ajp.23419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 06/22/2022] [Accepted: 06/26/2022] [Indexed: 11/10/2022]
Abstract
Facial expressions are key to navigating social group life. The Power Asymmetry Hypothesis of Motivational Emancipation predicts that the type of social organization shapes the meaning of communicative displays in relation to an individual's dominance rank. The bared-teeth (BT) display represents one of the most widely observed communicative signals across primate species. Studies in macaques indicate that the BT display in despotic species is often performed unidirectionally, from low- to high-ranking individuals (signaling submission), whereas the BT display in egalitarian species is usually produced irrespective of dominance (mainly signaling affiliation and appeasement). Despite its widespread presence, research connecting BT displays to the power asymmetry hypothesis outside the Macaca genus remains scarce. To extend this knowledge, we investigated the production of BT in relation to social dominance in dyadic interactions (N = 11,377 events) of 11 captive bonobos (Pan paniscus). Although adult bonobos were more despotic than previously suggested in the literature, BT displays were produced irrespective of dominance rank. Moreover, while adults produced the BT exclusively during socio-sexual interactions, especially during periods of social tension, immature bonobos produced the BT in a wider number of contexts. As such, the results indicate that the communicative meaning of the BT display is consistent with signaling appeasement, especially in periods of social tension. Moreover, the BT display does not seem to signal social status, supporting the prediction for species with a high degree of social tolerance. These results advance our understanding of the origins of communicative signals and their relation to species' social systems.
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Affiliation(s)
- Jolinde M R Vlaeyen
- Animal Behaviour and Cognition, Utrecht University, Utrecht, the Netherlands.,Institute of Cognitive Science Comparative BioCognition, University of Osnabrück, Osnabruck, Germany
| | | | - Mariska E Kret
- Cognitive Psychology Unit, Institute of Psychology, Leiden University, Leiden, the Netherlands
| | - Zanna Clay
- Department of Psychology, Durham University, Durham, UK
| | | | - Yena Kim
- Cognitive Psychology Unit, Institute of Psychology, Leiden University, Leiden, the Netherlands
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10
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Kehrer A, Ruewe M, Platz Batista da Silva N, Lonic D, Heidekrueger PI, Knoedler S, Jung EM, Prantl L, Knoedler L. Using High-Resolution Ultrasound to Assess Post-Facial Paralysis Synkinesis—Machine Settings and Technical Aspects for Facial Surgeons. Diagnostics (Basel) 2022; 12:diagnostics12071650. [PMID: 35885554 PMCID: PMC9322000 DOI: 10.3390/diagnostics12071650] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 07/05/2022] [Indexed: 12/27/2022] Open
Abstract
Background: Synkinesis of the facial musculature is a detrimental sequalae in post-paralytic facial palsy (PPFP) patients. Detailed knowledge on the technical requirements and device properties in a high-resolution ultrasound (HRUS) examination is mandatory for a reliable facial muscle assessment in PPFP patients. We therefore aimed to outline the key steps in a HRUS examination and extract an optimized workflow schema. Methods: From December 2020 to April 2021, 20 patients with unilateral synkinesis underwent HRUS. All HRUS examinations were performed by the first author using US devices with linear multifrequency transducers of 4–18 MHz, including a LOGIQ E9 and a LOGIQ S7 XDclear (GE Healthcare; Milwaukee, WI, USA), as well as Philips Affinity 50G (Philips Health Systems; Eindhoven, the Netherlands). Results: Higher-frequency and multifrequency linear probes ≥15 MHz provided superior imaging qualities. The selection of the preset program Small Parts, Breast or Thyroid was linked with a more detailed contrast of the imaging morphology of facial tissue layers. Frequency (Frq) = 15 MHz, Gain (Gn) = 25–35 db, Depth (D) = 1–1.5 cm, and Focus (F) = 0.5 cm enhanced the image quality and assessability. Conclusions: An optimized HRUS examination protocol for quantitative and qualitative facial muscle assessments was proposed.
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Affiliation(s)
- Andreas Kehrer
- Department of Plastic, Hand and Reconstructive Surgery, University Hospital Regensburg, 93053 Regensburg, Germany; (M.R.); (D.L.); (P.I.H.); (L.P.); (L.K.)
- Correspondence: ; Tel.: +49-941-944-6763
| | - Marc Ruewe
- Department of Plastic, Hand and Reconstructive Surgery, University Hospital Regensburg, 93053 Regensburg, Germany; (M.R.); (D.L.); (P.I.H.); (L.P.); (L.K.)
| | | | - Daniel Lonic
- Department of Plastic, Hand and Reconstructive Surgery, University Hospital Regensburg, 93053 Regensburg, Germany; (M.R.); (D.L.); (P.I.H.); (L.P.); (L.K.)
| | - Paul Immanuel Heidekrueger
- Department of Plastic, Hand and Reconstructive Surgery, University Hospital Regensburg, 93053 Regensburg, Germany; (M.R.); (D.L.); (P.I.H.); (L.P.); (L.K.)
| | - Samuel Knoedler
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany;
| | - Ernst Michael Jung
- Department of Radiology, University Hospital Regensburg, 93053 Regensburg, Germany; (N.P.B.d.S.); (E.M.J.)
| | - Lukas Prantl
- Department of Plastic, Hand and Reconstructive Surgery, University Hospital Regensburg, 93053 Regensburg, Germany; (M.R.); (D.L.); (P.I.H.); (L.P.); (L.K.)
| | - Leonard Knoedler
- Department of Plastic, Hand and Reconstructive Surgery, University Hospital Regensburg, 93053 Regensburg, Germany; (M.R.); (D.L.); (P.I.H.); (L.P.); (L.K.)
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11
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Correia-Caeiro C, Burrows A, Wilson DA, Abdelrahman A, Miyabe-Nishiwaki T. CalliFACS: The common marmoset Facial Action Coding System. PLoS One 2022; 17:e0266442. [PMID: 35580128 PMCID: PMC9113598 DOI: 10.1371/journal.pone.0266442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 03/21/2022] [Indexed: 11/19/2022] Open
Abstract
Facial expressions are subtle cues, central for communication and conveying emotions in mammals. Traditionally, facial expressions have been classified as a whole (e.g. happy, angry, bared-teeth), due to automatic face processing in the human brain, i.e., humans categorise emotions globally, but are not aware of subtle or isolated cues such as an eyebrow raise. Moreover, the same facial configuration (e.g. lip corners pulled backwards exposing teeth) can convey widely different information depending on the species (e.g. humans: happiness; chimpanzees: fear). The Facial Action Coding System (FACS) is considered the gold standard for investigating human facial behaviour and avoids subjective interpretations of meaning by objectively measuring independent movements linked to facial muscles, called Action Units (AUs). Following a similar methodology, we developed the CalliFACS for the common marmoset. First, we determined the facial muscular plan of the common marmoset by examining dissections from the literature. Second, we recorded common marmosets in a variety of contexts (e.g. grooming, feeding, play, human interaction, veterinary procedures), and selected clips from online databases (e.g. YouTube) to identify their facial movements. Individual facial movements were classified according to appearance changes produced by the corresponding underlying musculature. A diverse repertoire of 33 facial movements was identified in the common marmoset (15 Action Units, 15 Action Descriptors and 3 Ear Action Descriptors). Although we observed a reduced range of facial movement when compared to the HumanFACS, the common marmoset's range of facial movements was larger than predicted according to their socio-ecology and facial morphology, which indicates their importance for social interactions. CalliFACS is a scientific tool to measure facial movements, and thus, allows us to better understand the common marmoset's expressions and communication. As common marmosets have become increasingly popular laboratory animal models, from neuroscience to cognition, CalliFACS can be used as an important tool to evaluate their welfare, particularly in captivity.
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Affiliation(s)
| | - Anne Burrows
- Department of Physical Therapy, Duquesne University, Pittsburgh, Pennsylvania, United States of America
- Department of Anthropology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Duncan Andrew Wilson
- Primate Research Institute, Kyoto University, Inuyama, Japan
- Graduate School of Letters, Kyoto University, Kyoto, Japan
| | - Abdelhady Abdelrahman
- School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, United Kingdom
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12
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Usui K, Khannoon ER, Tokita M. Facial muscle modification associated with chiropteran noseleaf development: insights into the developmental basis of a movable rostral appendage in mammals. Dev Dyn 2022; 251:1368-1379. [DOI: 10.1002/dvdy.472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 03/12/2022] [Accepted: 03/17/2022] [Indexed: 11/05/2022] Open
Affiliation(s)
- Kaoru Usui
- Department of Biology, Faculty of Science Toho University, 2‐2‐1 Miyama, Funabashi Chiba JAPAN
| | - Eraqi R. Khannoon
- Biology Department College of Science, Taibah University, Al Madinah Al Munawwarah KSA
- Zoology Department, Faculty of Science Fayoum University Fayoum Egypt
| | - Masayoshi Tokita
- Department of Biology, Faculty of Science Toho University, 2‐2‐1 Miyama, Funabashi Chiba JAPAN
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13
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Kienle SS, Cuthbertson RD, Reidenberg JS. Comparative examination of pinniped craniofacial musculature and its role in aquatic feeding. J Anat 2022; 240:226-252. [PMID: 34697793 PMCID: PMC8742965 DOI: 10.1111/joa.13557] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 08/20/2021] [Accepted: 09/15/2021] [Indexed: 12/12/2022] Open
Abstract
Secondarily aquatic tetrapods have many unique morphologic adaptations for life underwater compared with their terrestrial counterparts. A key innovation during the land-to-water transition was feeding. Pinnipeds, a clade of air-breathing marine carnivorans that include seals, sea lions, and walruses, have evolved multiple strategies for aquatic feeding (e.g., biting, suction feeding). Numerous studies have examined the pinniped skull and dental specializations for underwater feeding. However, data on the pinniped craniofacial musculoskeletal system and its role in aquatic feeding are rare. Therefore, the objectives of this study were to conduct a comparative analysis of pinniped craniofacial musculature and examine the function of the craniofacial musculature in facilitating different aquatic feeding strategies. We performed anatomic dissections of 35 specimens across six pinniped species. We describe 32 pinniped craniofacial muscles-including facial expression, mastication, tongue, hyoid, and soft palate muscles. Pinnipeds broadly conform to mammalian patterns of craniofacial muscle morphology. Pinnipeds also exhibit unique musculoskeletal morphologies-in muscle position, attachments, and size-that likely represent adaptations for different aquatic feeding strategies. Suction feeding specialists (bearded and northern elephant seals) have a significantly larger masseter than biters. Further, northern elephant seals have large and unique tongue and hyoid muscle morphologies compared with other pinniped species. These morphologic changes likely help generate and withstand suction pressures necessary for drawing water and prey into the mouth. In contrast, biting taxa (California sea lions, harbor, ringed, and Weddell seals) do not exhibit consistent craniofacial musculoskeletal adaptations that differentiate them from suction feeders. Generally, we discover that all pinnipeds have well-developed and robust craniofacial musculature. Pinniped head musculature plays an important role in facilitating different aquatic feeding strategies. Together with behavioral and kinematic studies, our data suggest that pinnipeds' robust facial morphology allows animals to switch feeding strategies depending on the environmental context-a critical skill in a heterogeneous and rapidly changing underwater habitat.
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Affiliation(s)
| | - Roxanne D. Cuthbertson
- Department of Biology and Marine BiologyUniversity of North Carolina WilmingtonWilmingtonNorth CarolinaUSA
| | - Joy S. Reidenberg
- Icahn School of Medicine at Mount SinaiCenter for Anatomy and Functional MorphologyNew YorkNew YorkUSA
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14
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Sliwa J, Mallet M, Christiaens M, Takahashi DY. Neural basis of multi-sensory communication in primates. ETHOL ECOL EVOL 2022. [DOI: 10.1080/03949370.2021.2024266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Julia Sliwa
- Paris Brain Institute–Institut du Cerveau, Inserm, CNRS, APHP, Hôpital Pitié-Salpêtrière, Sorbonne Université, Paris, France
| | - Marion Mallet
- Paris Brain Institute–Institut du Cerveau, Inserm, CNRS, APHP, Hôpital Pitié-Salpêtrière, Sorbonne Université, Paris, France
| | - Maëlle Christiaens
- Paris Brain Institute–Institut du Cerveau, Inserm, CNRS, APHP, Hôpital Pitié-Salpêtrière, Sorbonne Université, Paris, France
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15
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Correia-Caeiro C, Holmes K, Miyabe-Nishiwaki T. Extending the MaqFACS to measure facial movement in Japanese macaques (Macaca fuscata) reveals a wide repertoire potential. PLoS One 2021; 16:e0245117. [PMID: 33411716 PMCID: PMC7790396 DOI: 10.1371/journal.pone.0245117] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 12/23/2020] [Indexed: 02/01/2023] Open
Abstract
Facial expressions are complex and subtle signals, central for communication and emotion in social mammals. Traditionally, facial expressions have been classified as a whole, disregarding small but relevant differences in displays. Even with the same morphological configuration different information can be conveyed depending on the species. Due to a hardwired processing of faces in the human brain, humans are quick to attribute emotion, but have difficulty in registering facial movement units. The well-known human FACS (Facial Action Coding System) is the gold standard for objectively measuring facial expressions, and can be adapted through anatomical investigation and functional homologies for cross-species systematic comparisons. Here we aimed at developing a FACS for Japanese macaques, following established FACS methodology: first, we considered the species' muscular facial plan; second, we ascertained functional homologies with other primate species; and finally, we categorised each independent facial movement into Action Units (AUs). Due to similarities in the rhesus and Japanese macaques' facial musculature, the MaqFACS (previously developed for rhesus macaques) was used as a basis to extend the FACS tool to Japanese macaques, while highlighting the morphological and appearance changes differences between the two species. We documented 19 AUs, 15 Action Descriptors (ADs) and 3 Ear Action Units (EAUs) in Japanese macaques, with all movements of MaqFACS found in Japanese macaques. New movements were also observed, indicating a slightly larger repertoire than in rhesus or Barbary macaques. Our work reported here of the MaqFACS extension for Japanese macaques, when used together with the MaqFACS, comprises a valuable objective tool for the systematic and standardised analysis of facial expressions in Japanese macaques. The MaqFACS extension for Japanese macaques will now allow the investigation of the evolution of communication and emotion in primates, as well as contribute to improving the welfare of individuals, particularly in captivity and laboratory settings.
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Affiliation(s)
| | - Kathryn Holmes
- School of Psychology, University of Lincoln, Lincoln, Lincolnshire, United Kingdom
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16
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Emotional expressions in human and non-human great apes. Neurosci Biobehav Rev 2020; 115:378-395. [DOI: 10.1016/j.neubiorev.2020.01.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 01/17/2020] [Accepted: 01/22/2020] [Indexed: 11/23/2022]
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17
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Dickinson E, Atkinson E, Meza A, Kolli S, Deutsch AR, Burrows AM, Hartstone-Rose A. Visualization and quantification of mimetic musculature via DiceCT. PeerJ 2020; 8:e9343. [PMID: 32587802 PMCID: PMC7304424 DOI: 10.7717/peerj.9343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 05/21/2020] [Indexed: 01/14/2023] Open
Abstract
The muscles of facial expression are of significant interest to studies of communicative behaviors. However, due to their small size and high integration with other facial tissues, the current literature is largely restricted to descriptions of the presence or absence of specific muscles. Using diffusible iodine-based contrast-enhanced computed tomography (DiceCT) to stain and digitally image the mimetic mask of Eulemur flavifrons (the blue-eyed black lemur), we demonstrate-for the first time-the ability to visualize these muscles in three-dimensional space and to measure their relative volumes. Comparing these data to earlier accounts of mimetic organization with the face of lemuroidea, we demonstrate several novel configurations within this taxon, particularly in the superior auriculolabialis and the posterior auricularis. We conclude that DiceCT facilitates the study these muscles in closer detail than has been previously possible, and offers significant potential for future studies of this anatomy.
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Affiliation(s)
- Edwin Dickinson
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America
| | - Emily Atkinson
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America
| | - Antonio Meza
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America
| | - Shruti Kolli
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America
| | - Ashley R. Deutsch
- Department of Anthropology, University of Florida, Gainesville, FL, United States of America
| | - Anne M. Burrows
- Department of Physical Therapy, Duquesne University, Pittsburgh, PA, United States of America
- Department of Anthropology, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Adam Hartstone-Rose
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America
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18
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The Role of Sexual Selection in the Evolution of Facial Displays in Male Non-human Primates and Men. ADAPTIVE HUMAN BEHAVIOR AND PHYSIOLOGY 2020. [DOI: 10.1007/s40750-020-00139-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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19
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Iwanaga J, Watanabe K, Kikuta S, Hirasaki E, Yamaki KI, Bohm RP, Dumont AS, Tubbs RS. Anatomical study of the incisivus labii superioris and inferioris muscles in non-human primates. Anat Rec (Hoboken) 2020; 304:366-371. [PMID: 32420698 DOI: 10.1002/ar.24406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/02/2020] [Accepted: 02/08/2020] [Indexed: 11/11/2022]
Abstract
The facial muscles have significant roles for vocalization, feeding, and facial expression in both human and non-human primates. Of these, the anatomy of the incisivus labii superioris (ILS) and incisivus labii inferioris (ILI), which are considered as the accessory bundle of the orbicularis oris (OO) in humans, has rarely been documented in the literature. Our current understanding of the function of the ILS and ILI is that they probably retract the upper and lower lips. Also, there is no account of these muscles in non-human primates in the current literature. The aim of this study was to reveal the ILS and ILI in non-human primates. Five Macaca fascicularis, one Macaca fuscata, one Macaca fuscata yakui, and one Pan troglodytes were dissected. Seven formalin-fixed cadavers and one fresh cadaver were included. Both the ILS and ILI were observed in all specimens. The ILS originated from the incisive fossa of the maxilla and inserted into the OO. The mentalis (MT) and ILI arose from the incisive fossa of the mandible and inserted into the OO and the skin of the chin area. The MT and ILI in the P. troglodytes examined were thicker than in the other three non-human species, and the ILS and ILI in the three macaques were similar in shape to those of humans. The difference of these muscles may result in different functions of the lip such as during vocalization, feeding, and facial expression.
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Affiliation(s)
- Joe Iwanaga
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, Louisiana, USA.,Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume, Japan.,Dental and Oral Medical Center, Kurume University School of Medicine, Kurume, Japan
| | - Koichi Watanabe
- Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume, Japan
| | - Shogo Kikuta
- Dental and Oral Medical Center, Kurume University School of Medicine, Kurume, Japan
| | - Eishi Hirasaki
- Evolutionary Morphology Section, Primate Research Institute, Kyoto University, Inuyama, Japan
| | - Koh-Ichi Yamaki
- Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume, Japan
| | - Rudolf P Bohm
- Division of Veterinary Medicine, Tulane National Primate Research Center, New Orleans, Louisiana, USA
| | - Aaron S Dumont
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, Louisiana, USA
| | - R Shane Tubbs
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, Louisiana, USA.,Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, Louisiana, USA.,Department of Anatomical Sciences, St. George's University, St. George's, Grenada
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20
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Differences in facial expressions during positive anticipation and frustration in dogs awaiting a reward. Sci Rep 2019; 9:19312. [PMID: 31848389 PMCID: PMC6917793 DOI: 10.1038/s41598-019-55714-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 11/29/2019] [Indexed: 02/06/2023] Open
Abstract
Facial expressions are considered sensitive indicators of emotional states in humans and many animals. Identifying facial indicators of emotion is a major challenge and little systematic research has been done in non-primate species. In dogs, such research is important not only to address fundamental and applied scientific questions but also for practical reasons, since many problem behaviours are assumed to have an emotional basis, e.g. aggression based on frustration. Frustration responses can occur in superficially similar contexts as the emotional state of positive anticipation. For instance, the anticipated delivery of a food reward may induce the state of positive anticipation, but over time, if the food is not delivered, this will be replaced by frustration. We examined dogs’ facial expressions in contexts presumed to induce both positive anticipation and frustration, respectively, within a single controlled experimental setting. Using DogFACS, an anatomically-based method for coding facial expressions of dogs, we found that the “Ears adductor” action was more common in the positive condition and “Blink”, “Lips part”, “Jaw drop”, “Nose lick”, and “Ears flattener” were more common in the negative condition. This study demonstrates how differences in facial expression in emotionally ambiguous contexts may be used to help infer emotional states of different valence.
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21
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Cain BW, Reynolds T, Sarko DK. Superficial, suprahyoid, and infrahyoid neck musculature in naked mole-rats (Heterocephalus glaber): Relative size and potential contributions to independent movement of the lower incisors. J Morphol 2019; 280:1185-1196. [PMID: 31180596 DOI: 10.1002/jmor.21022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/22/2019] [Accepted: 05/24/2019] [Indexed: 11/06/2022]
Abstract
Naked mole-rats (Heterocephalus glaber) are fossorial, eusocial rodents that exhibit the unusual capability of moving their lower incisors independently in lateral and rostroventral directions. The evolution of this trait would presumably also involve concurrent alterations in neck musculature to support and control movements of the lower incisors. In order to assess morphological adaptations that might facilitate these movements, we performed detailed dissections of the neck musculature of adult naked mole-rats. In addition to characterizing attachment sites of superficial, suprahyoid, and infrahyoid musculature, we also quantified muscle mass and mandibular features thought to be associated with gape (condyle height, condyle length, and jaw length). Based on muscle attachment sites, the platysma myoides may contribute to lateral movement of the lower incisor and hemi-mandible in naked mole-rats. The large digastric muscle is likely to be a main contributor to rostroventral movement of each lower incisor. The geniohyoid and mylohyoid muscles also likely contribute to rostroventral movements of the lower incisors, and the mylohyoid may also produce lateral spreading of the hemi-mandibles. The transverse mandibular (intermandibularis) muscle likely serves to reposition the lower incisors back to a midline orientation following a movement.
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Affiliation(s)
- Blake W Cain
- Southern Illinois University School of Medicine, Department of Anatomy, Carbondale, Illinois
| | - Taylor Reynolds
- Southern Illinois University School of Medicine, Department of Anatomy, Carbondale, Illinois
| | - Diana K Sarko
- Southern Illinois University School of Medicine, Department of Anatomy, Carbondale, Illinois
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22
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Taylor D, Hartmann D, Dezecache G, Te Wong S, Davila-Ross M. Facial Complexity in Sun Bears: Exact Facial Mimicry and Social Sensitivity. Sci Rep 2019; 9:4961. [PMID: 30899046 PMCID: PMC6428817 DOI: 10.1038/s41598-019-39932-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 01/31/2019] [Indexed: 01/10/2023] Open
Abstract
Facial mimicry is a central feature of human social interactions. Although it has been evidenced in other mammals, no study has yet shown that this phenomenon can reach the level of precision seem in humans and gorillas. Here, we studied the facial complexity of group-housed sun bears, a typically solitary species, with special focus on testing for exact facial mimicry. Our results provided evidence that the bears have the ability to mimic the expressions of their conspecifics and that they do so by matching the exact facial variants they interact with. In addition, the data showed the bears produced the open-mouth faces predominantly when they received the recipient's attention, suggesting a degree of social sensitivity. Our finding questions the relationship between communicative complexity and social complexity, and suggests the possibility that the capacity for complex facial communication is phylogenetically more widespread than previously thought.
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Affiliation(s)
- Derry Taylor
- Psychology Department, University of Portsmouth, King Henry Building, Portsmouth, PO1 2DY, United Kingdom
| | - Daniela Hartmann
- Justus Liebig University Gießen, Department of Special Needs and Clinical Child and Adolescent Psychology. Otto-Behaghelstraße 10E, D35394, Gießen, Germany
| | - Guillaume Dezecache
- Institut Jean Nicod, Département d'études cognitives, ENS, EHESS, CNRS, PSL Research University, Paris, France
| | - Siew Te Wong
- Bornean Sun Bear Conservation Centre, PPM 219, Elopura, Sandakan, 90000, Sabah, Malaysia
| | - Marina Davila-Ross
- Psychology Department, University of Portsmouth, King Henry Building, Portsmouth, PO1 2DY, United Kingdom.
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23
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Sliwa J, Takahashi D, Shepherd S. Mécanismes neuronaux pour la communication chez les primates. REVUE DE PRIMATOLOGIE 2018. [DOI: 10.4000/primatologie.2950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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24
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Ziermann JM, Diogo R, Noden DM. Neural crest and the patterning of vertebrate craniofacial muscles. Genesis 2018; 56:e23097. [PMID: 29659153 DOI: 10.1002/dvg.23097] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/22/2018] [Accepted: 02/25/2018] [Indexed: 12/17/2022]
Abstract
Patterning of craniofacial muscles overtly begins with the activation of lineage-specific markers at precise, evolutionarily conserved locations within prechordal, lateral, and both unsegmented and somitic paraxial mesoderm populations. Although these initial programming events occur without influence of neural crest cells, the subsequent movements and differentiation stages of most head muscles are neural crest-dependent. Incorporating both descriptive and experimental studies, this review examines each stage of myogenesis up through the formation of attachments to their skeletal partners. We present the similarities among developing muscle groups, including comparisons with trunk myogenesis, but emphasize the morphogenetic processes that are unique to each group and sometimes subsets of muscles within a group. These groups include branchial (pharyngeal) arches, which encompass both those with clear homologues in all vertebrate classes and those unique to one, for example, mammalian facial muscles, and also extraocular, laryngeal, tongue, and neck muscles. The presence of several distinct processes underlying neural crest:myoblast/myocyte interactions and behaviors is not surprising, given the wide range of both quantitative and qualitative variations in craniofacial muscle organization achieved during vertebrate evolution.
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Affiliation(s)
- Janine M Ziermann
- Department of Anatomy, Howard University College of Medicine, Washington, DC
| | - Rui Diogo
- Department of Anatomy, Howard University College of Medicine, Washington, DC
| | - Drew M Noden
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY
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25
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Affiliation(s)
- Jinguang Zhang
- Department of Communicology, University of Hawaii, Honolulu, HI, United States
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26
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Perry JMG, Prufrock KA. Muscle Functional Morphology in Paleobiology: The Past, Present, and Future of “Paleomyology”. Anat Rec (Hoboken) 2018; 301:538-555. [DOI: 10.1002/ar.23772] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/14/2017] [Accepted: 12/15/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Jonathan M. G. Perry
- Center for Functional Anatomy and Evolution; The Johns Hopkins University School of Medicine; Baltimore Maryland
| | - Kristen A. Prufrock
- Center for Functional Anatomy and Evolution; The Johns Hopkins University School of Medicine; Baltimore Maryland
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27
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Burrows AM. Functional Morphology of Mimetic Musculature in Primates: How Social Variables and Body Size Stack up to Phylogeny. Anat Rec (Hoboken) 2018; 301:202-215. [DOI: 10.1002/ar.23710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 07/13/2017] [Accepted: 08/18/2017] [Indexed: 12/29/2022]
Affiliation(s)
- Anne M Burrows
- Department of Physical Therapy; Duquesne University; Pittsburgh Pennsylvania
- Department of Anthropology; University of Pittsburgh; Pittsburgh Pennsylvania
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28
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Caeiro C, Guo K, Mills D. Dogs and humans respond to emotionally competent stimuli by producing different facial actions. Sci Rep 2017; 7:15525. [PMID: 29138393 PMCID: PMC5686192 DOI: 10.1038/s41598-017-15091-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 10/20/2017] [Indexed: 01/17/2023] Open
Abstract
The commonality of facial expressions of emotion has been studied in different species since Darwin, with most of the research focusing on closely related primate species. However, it is unclear to what extent there exists common facial expression in species more phylogenetically distant, but sharing a need for common interspecific emotional understanding. Here we used the objective, anatomically-based tools, FACS and DogFACS (Facial Action Coding Systems), to quantify and compare human and domestic dog facial expressions in response to emotionally-competent stimuli associated with different categories of emotional arousal. We sought to answer two questions: Firstly, do dogs display specific discriminatory facial movements in response to different categories of emotional stimuli? Secondly, do dogs display similar facial movements to humans when reacting in emotionally comparable contexts? We found that dogs displayed distinctive facial actions depending on the category of stimuli. However, dogs produced different facial movements to humans in comparable states of emotional arousal. These results refute the commonality of emotional expression across mammals, since dogs do not display human-like facial expressions. Given the unique interspecific relationship between dogs and humans, two highly social but evolutionarily distant species sharing a common environment, these findings give new insight into the origin of emotion expression.
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Affiliation(s)
- Cátia Caeiro
- School of Psychology, University of Lincoln, Lincoln, UK. .,School of Life Sciences, University of Lincoln, Lincoln, UK.
| | - Kun Guo
- School of Psychology, University of Lincoln, Lincoln, UK
| | - Daniel Mills
- School of Life Sciences, University of Lincoln, Lincoln, UK
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29
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Human attention affects facial expressions in domestic dogs. Sci Rep 2017; 7:12914. [PMID: 29051517 PMCID: PMC5648750 DOI: 10.1038/s41598-017-12781-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 09/18/2017] [Indexed: 11/13/2022] Open
Abstract
Most mammalian species produce facial expressions. Historically, animal facial expressions have been considered inflexible and involuntary displays of emotional states rather than active attempts to communicate with others. In the current study, we aimed to test whether domestic dog facial expressions are subject to audience effects and/ or changes in response to an arousing stimulus (e.g. food) alone. We presented dogs with an experimental situation in which a human demonstrator was either attending to them or turned away, and varied whether she presented food or not. Dogs produced significantly more facial movements when the human was attentive than when she was not. The food, however, as a non-social but arousing stimulus, did not affect the dogs’ behaviour. The current study is therefore evidence that dogs are sensitive to the human’s attentional state when producing facial expressions, suggesting that facial expressions are not just inflexible and involuntary displays of emotional states, but rather potentially active attempts to communicate with others.
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30
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Chapman HA, Lee DH, Susskind JM, Bartlett MS, Anderson AK. The Face of Distaste: A Preliminary Study. Chem Senses 2017; 42:457-463. [PMID: 28486601 DOI: 10.1093/chemse/bjx024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Distaste is a primitive rejection impulse triggered by the ingestion of unpleasant tasting substances, many of which are toxic. Theoretical work has suggested that distaste may be the evolutionary precursor for both physical disgust, which serves to defend against disease and other threats to biological fitness, and moral disgust, which defends against threats to the social order. Consistent with this proposal, recent work has found that the facial expression of distaste may be similar to that of disgust. Specifically, raising of the upper lip has been reported in distaste, physical disgust, and moral disgust. However, competing evidence suggests that distaste and disgust expressions may differ, and the facial expressions of adult humans in response to distasteful stimuli remain poorly specified. To address this issue, we conducted a preliminary experiment to investigate the upper lip raise in adult volunteers (N = 15) as they tasted unpleasant, pleasant, and neutral liquids. We found increased raising of the upper lip for bitter and salty tastes relative to water and sweet, suggesting that the upper lip raise is indeed part of the distaste expression. Given evidence that the upper lip raise is also present in physical and moral disgust, these results are consistent with the proposed origins of disgust in distaste.
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Affiliation(s)
- Hanah A Chapman
- Department of Psychology, Brooklyn College, CUNY 2900 Bedford Ave., Brooklyn, NY 11225, USA
| | - Daniel H Lee
- Institute of Cognitive Science, UCB 344, MUEN PSYCH Building D414 University of Colorado, Boulder, CO 80309, USA
| | - Joshua M Susskind
- Institute for Neural Computation, University of California San Diego, 9500 Gilman Drive - 0523, La Jolla, CA 92093-0523, USA and
| | - Marni S Bartlett
- Institute for Neural Computation, University of California San Diego, 9500 Gilman Drive - 0523, La Jolla, CA 92093-0523, USA and
| | - Adam K Anderson
- Department of Human Development, G77 Martha Van Rensselaer Hall, Cornell University, Ithaca, NY 14853-4401, USA
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31
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Caeiro C, Burrows A, Waller B. Development and application of CatFACS: Are human cat adopters influenced by cat facial expressions? Appl Anim Behav Sci 2017. [DOI: 10.1016/j.applanim.2017.01.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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Dehbashi M, Kamali E, Vallian S. Comparative genomics of human stem cell factor (SCF). MOLECULAR BIOLOGY RESEARCH COMMUNICATIONS 2017; 6:1-11. [PMID: 28447043 PMCID: PMC5396809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Stem cell factor (SCF) is a critical protein with key roles in the cell such as hematopoiesis, gametogenesis and melanogenesis. In the present study a comparative analysis on nucleotide sequences of SCF was performed in Humanoids using bioinformatics tools including NCBI-BLAST, MEGA6, and JBrowse. Our analysis of nucleotide sequences to find closely evolved organisms with high similarity by NCBI-BLAST tools and MEGA6 showed that human and Chimpanzee (Pan troglodytes) were placed into the same cluster. By using JBrowse, we found that SCF in Neanderthal had a single copy number similar to modern human and partly conserved nucleotide sequences. Together, the results approved the gene flow and genetics similarity of SCF among human and P. troglodytes. This may suggest that during evolution, SCF gene transferred partly intact either on the basis of sequence or function from the same ancestors to P. troglodytes, the ancient human like Neanderthal, and then to the modern human.
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Affiliation(s)
| | | | - Sadeq Vallian
- Genetics Division, Department of Biology, Faculty of Science, University of Isfahan, Isfahan, Iran
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Guesgen MJ, Beausoleil NJ, Leach M, Minot EO, Stewart M, Stafford KJ. Coding and quantification of a facial expression for pain in lambs. Behav Processes 2016; 132:49-56. [PMID: 27693533 DOI: 10.1016/j.beproc.2016.09.010] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 07/05/2016] [Accepted: 09/27/2016] [Indexed: 11/17/2022]
Abstract
Facial expressions are routinely used to assess pain in humans, particularly those who are non-verbal. Recently, there has been an interest in developing coding systems for facial grimacing in non-human animals, such as rodents, rabbits, horses and sheep. The aims of this preliminary study were to: 1. Qualitatively identify facial feature changes in lambs experiencing pain as a result of tail-docking and compile these changes to create a Lamb Grimace Scale (LGS); 2. Determine whether human observers can use the LGS to differentiate tail-docked lambs from control lambs and differentiate lambs before and after docking; 3. Determine whether changes in facial action units of the LGS can be objectively quantified in lambs before and after docking; 4. Evaluate effects of restraint of lambs on observers' perceptions of pain using the LGS and on quantitative measures of facial action units. By comparing images of lambs before (no pain) and after (pain) tail-docking, the LGS was devised in consultation with scientists experienced in assessing facial expression in other species. The LGS consists of five facial action units: Orbital Tightening, Mouth Features, Nose Features, Cheek Flattening and Ear Posture. The aims of the study were addressed in two experiments. In Experiment I, still images of the faces of restrained lambs were taken from video footage before and after tail-docking (n=4) or sham tail-docking (n=3). These images were scored by a group of five naïve human observers using the LGS. Because lambs were restrained for the duration of the experiment, Ear Posture was not scored. The scores for the images were averaged to provide one value per feature per period and then scores for the four LGS action units were averaged to give one LGS score per lamb per period. In Experiment II, still images of the faces nine lambs were taken before and after tail-docking. Stills were taken when lambs were restrained and unrestrained in each period. A different group of five human observers scored the images from Experiment II. Changes in facial action units were also quantified objectively by a researcher using image measurement software. In both experiments LGS scores were analyzed using a linear MIXED model to evaluate the effects of tail docking on observers' perception of facial expression changes. Kendall's Index of Concordance was used to measure reliability among observers. In Experiment I, human observers were able to use the LGS to differentiate docked lambs from control lambs. LGS scores significantly increased from before to after treatment in docked lambs but not control lambs. In Experiment II there was a significant increase in LGS scores after docking. This was coupled with changes in other validated indicators of pain after docking in the form of pain-related behaviour. Only two components, Mouth Features and Orbital Tightening, showed significant quantitative changes after docking. The direction of these changes agree with the description of these facial action units in the LGS. Restraint affected people's perceptions of pain as well as quantitative measures of LGS components. Freely moving lambs were scored lower using the LGS over both periods and had a significantly smaller eye aperture and smaller nose and ear angles than when they were held. Agreement among observers for LGS scores were fair overall (Experiment I: W=0.60; Experiment II: W=0.66). This preliminary study demonstrates changes in lamb facial expression associated with pain. The results of these experiments should be interpreted with caution due to low lamb numbers.
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Affiliation(s)
- M J Guesgen
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand.
| | - N J Beausoleil
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand
| | - M Leach
- School of Agriculture, Food & Rural Development, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - E O Minot
- Institute of Agriculture and Environment, Massey University, Palmerston North, New Zealand
| | - M Stewart
- InterAg, Ruakura Research Centre, Hamilton, New Zealand
| | - K J Stafford
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand
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Burrows AM, Waller BM, Micheletta J. Mimetic Muscles in a Despotic Macaque (Macaca mulatta) Differ from Those in a Closely Related Tolerant Macaque (M. nigra). Anat Rec (Hoboken) 2016; 299:1317-24. [DOI: 10.1002/ar.23393] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/14/2016] [Accepted: 04/19/2016] [Indexed: 01/14/2023]
Affiliation(s)
- Anne M. Burrows
- Department of Physical Therapy; Duquesne University; Pittsburgh Pennsylvania
- Department of Anthropology; University of Pittsburgh; Pittsburgh Pennsylvania
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Diogo R, Bello‐Hellegouarch G, Kohlsdorf T, Esteve‐Altava B, Molnar JL. Comparative Myology and Evolution of Marsupials and Other Vertebrates, With Notes on Complexity, Bauplan, and “Scala Naturae”. Anat Rec (Hoboken) 2016; 299:1224-55. [DOI: 10.1002/ar.23390] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 05/06/2016] [Accepted: 05/09/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Rui Diogo
- Department of AnatomyHoward University College of MedicineWashington DC USA
| | | | - Tiana Kohlsdorf
- Department of BiologyFFCLRP, University of São Paulo, Avenida BandeirantesRibeirão Preto SP Brazil
| | - Borja Esteve‐Altava
- Department of AnatomyHoward University College of MedicineWashington DC USA
- Structure and Motion Laboratory Department of Comparative Biomedical SciencesRoyal Veterinary College, Hawkshead Lane, HatfieldHertfordshireAL9 7TA UK
| | - Julia L. Molnar
- Department of AnatomyHoward University College of MedicineWashington DC USA
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Touré G, Anzouan-Kacou E. The styloauricular muscle: clinical relevance and literature review of this rare muscle. Surg Radiol Anat 2016; 38:983-6. [PMID: 26846137 DOI: 10.1007/s00276-016-1633-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 01/18/2016] [Indexed: 11/30/2022]
Abstract
PURPOSE In humans, the styloauricularis is a rare muscle extending from the tragal cartilage of the auricle to the styloid process. When it contracts, by bearing on the styloid process, it increases the cephalo-auricular angle. It can be a landmark for the facial nerve. We report a case with bilateral presence of the styloauricularis. METHODS Bilateral presence of the styloauricularis was discovered during routine dissection of the head and neck. RESULTS In the presented case, styloauricularis muscles arose from the cartilage of the external acoustic meatus on both sides of the head, crossing halfway along the facial nerve trunk and inserting the styloid process. Both muscles were vascularized by a branch of the posterior auricular artery, and innervated by the facial nerve. CONCLUSIONS The ventral auricular muscle, formed by the auricular parotid and the styloauricular muscles, is a muscle that lowers and abducts the auricle in animals. There is generally considered to be no equivalent for these muscles in humans, however, this bilateral case reveals evidence to the contrary. There is a dearth of scientific literature about the styloauricularis. The study of this muscle demonstrated the usefulness of comparative anatomy in understanding its action in increasing the cephalo-auricular angle.
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Affiliation(s)
- Gaoussou Touré
- Department of Maxillofacial Surgery (Head), CHI Villeneuve-Saint-Georges, 40 allée de la source, 94195, Villeneuve-Saint-Georges Cedex, France. .,Research and Development Unit, Imaging and Anatomy (URDIA EA 4465), Université Paris Descartes, 45 rue des Saints-Pères, 75006, Paris, France.
| | - Evelyne Anzouan-Kacou
- Department of Maxillofacial Surgery (Head), CHI Villeneuve-Saint-Georges, 40 allée de la source, 94195, Villeneuve-Saint-Georges Cedex, France.,Department of Stomatology and Maxillofacial Surgery, CHU de Treichville, Abidjan, Ivory Coast
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Somppi S, Törnqvist H, Kujala MV, Hänninen L, Krause CM, Vainio O. Dogs Evaluate Threatening Facial Expressions by Their Biological Validity--Evidence from Gazing Patterns. PLoS One 2016; 11:e0143047. [PMID: 26761433 PMCID: PMC4711950 DOI: 10.1371/journal.pone.0143047] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 10/30/2015] [Indexed: 01/21/2023] Open
Abstract
Appropriate response to companions' emotional signals is important for all social creatures. The emotional expressions of humans and non-human animals have analogies in their form and function, suggesting shared evolutionary roots, but very little is known about how animals other than primates view and process facial expressions. In primates, threat-related facial expressions evoke exceptional viewing patterns compared with neutral or positive stimuli. Here, we explore if domestic dogs (Canis familiaris) have such an attentional bias toward threatening social stimuli and whether observed emotional expressions affect dogs' gaze fixation distribution among the facial features (eyes, midface and mouth). We recorded the voluntary eye gaze of 31 domestic dogs during viewing of facial photographs of humans and dogs with three emotional expressions (threatening, pleasant and neutral). We found that dogs' gaze fixations spread systematically among facial features. The distribution of fixations was altered by the seen expression, but eyes were the most probable targets of the first fixations and gathered longer looking durations than mouth regardless of the viewed expression. The examination of the inner facial features as a whole revealed more pronounced scanning differences among expressions. This suggests that dogs do not base their perception of facial expressions on the viewing of single structures, but the interpretation of the composition formed by eyes, midface and mouth. Dogs evaluated social threat rapidly and this evaluation led to attentional bias, which was dependent on the depicted species: threatening conspecifics' faces evoked heightened attention but threatening human faces instead an avoidance response. We propose that threatening signals carrying differential biological validity are processed via distinctive neurocognitive pathways. Both of these mechanisms may have an adaptive significance for domestic dogs. The findings provide a novel perspective on understanding the processing of emotional expressions and sensitivity to social threat in non-primates.
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Affiliation(s)
- Sanni Somppi
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
- * E-mail:
| | - Heini Törnqvist
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
- Cognitive Science, Faculty of Behavioural Sciences, University of Helsinki, Helsinki, Finland
| | - Miiamaaria V. Kujala
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
- Department of Neuroscience and Biomedical Engineering, Aalto University, Espoo, Finland
| | - Laura Hänninen
- Department of Production Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
| | - Christina M. Krause
- Cognitive Science, Faculty of Behavioural Sciences, University of Helsinki, Helsinki, Finland
| | - Outi Vainio
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
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Diogo R, Smith CM, Ziermann JM. Evolutionary developmental pathology and anthropology: A new field linking development, comparative anatomy, human evolution, morphological variations and defects, and medicine. Dev Dyn 2015; 244:1357-74. [DOI: 10.1002/dvdy.24336] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 08/10/2015] [Accepted: 08/12/2015] [Indexed: 01/24/2023] Open
Affiliation(s)
- Rui Diogo
- Department of Anatomy; Howard University College of Medicine; Washington DC
| | | | - Janine M. Ziermann
- Department of Anatomy; Howard University College of Medicine; Washington DC
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Lecorps B, Féron C. Correlates between ear postures and emotional reactivity in a wild type mouse species. Behav Processes 2015; 120:25-9. [PMID: 26275830 DOI: 10.1016/j.beproc.2015.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 08/05/2015] [Accepted: 08/07/2015] [Indexed: 11/29/2022]
Abstract
Facial expressions have been extensively used to assess emotions in humans and thus could be extended to other species that also display facial movements. In mice both painful and fearful situations have been associated with particular shifts in facial expressions. Like other species, mice frequently show a great inter-individual variability when exposed to emotional situations, but so far no study has been conducted to investigate if facial expressions are related to these differences. The aim of this study is to explore if mice of wild origin (Mus spicilegus) express different facial expressions when confronted to novelty and to relate these mimics to their emotional reactivity profile. We used individual exploration scores in a novel odour test and in the elevated plus maze test as proxy measures of individual emotional reactivity. Our results showed that exploration scores in both tests were positively correlated, and both were related to the ear postures expressed by the individuals during their first exploration of the novel odour. This single component of facial expression was in fact a good indicator of inter-individual differences expressed in these two different tests suggesting a strong link between this marker and the individual emotional reactivity. These results highlight the great potential of facial expressions to assess emotional states in animals.
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Affiliation(s)
- Benjamin Lecorps
- Laboratoire d'Ethologie Expérimentale et Comparée, Université Paris 13, Sorbonne Paris Cité, Avenue JB Clément, Villetaneuse 93430, France.
| | - Christophe Féron
- Laboratoire d'Ethologie Expérimentale et Comparée, Université Paris 13, Sorbonne Paris Cité, Avenue JB Clément, Villetaneuse 93430, France
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40
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Wathan J, Burrows AM, Waller BM, McComb K. EquiFACS: The Equine Facial Action Coding System. PLoS One 2015; 10:e0131738. [PMID: 26244573 PMCID: PMC4526551 DOI: 10.1371/journal.pone.0131738] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 06/04/2015] [Indexed: 11/18/2022] Open
Abstract
Although previous studies of horses have investigated their facial expressions in specific contexts, e.g. pain, until now there has been no methodology available that documents all the possible facial movements of the horse and provides a way to record all potential facial configurations. This is essential for an objective description of horse facial expressions across a range of contexts that reflect different emotional states. Facial Action Coding Systems (FACS) provide a systematic methodology of identifying and coding facial expressions on the basis of underlying facial musculature and muscle movement. FACS are anatomically based and document all possible facial movements rather than a configuration of movements associated with a particular situation. Consequently, FACS can be applied as a tool for a wide range of research questions. We developed FACS for the domestic horse (Equus caballus) through anatomical investigation of the underlying musculature and subsequent analysis of naturally occurring behaviour captured on high quality video. Discrete facial movements were identified and described in terms of the underlying muscle contractions, in correspondence with previous FACS systems. The reliability of others to be able to learn this system (EquiFACS) and consistently code behavioural sequences was high—and this included people with no previous experience of horses. A wide range of facial movements were identified, including many that are also seen in primates and other domestic animals (dogs and cats). EquiFACS provides a method that can now be used to document the facial movements associated with different social contexts and thus to address questions relevant to understanding social cognition and comparative psychology, as well as informing current veterinary and animal welfare practices.
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Affiliation(s)
- Jen Wathan
- Mammal Communication and Cognition Research, School of Psychology, University of Sussex, Brighton, United Kingdom
- * E-mail: (JW); (KM)
| | - Anne M. Burrows
- Centre for Comparative and Evolutionary Psychology, Department of Psychology, University of Portsmouth, Portsmouth, United Kingdom
| | - Bridget M. Waller
- Department of Physical Therapy, Duquesne University, Pittsburgh, Pennsylvania, United States of America
| | - Karen McComb
- Mammal Communication and Cognition Research, School of Psychology, University of Sussex, Brighton, United Kingdom
- * E-mail: (JW); (KM)
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Natale G, Condino S, Stecco A, Soldani P, Belmonte MM, Gesi M. Is the cervical fascia an anatomical proteus? Surg Radiol Anat 2015; 37:1119-27. [PMID: 25946970 DOI: 10.1007/s00276-015-1480-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 04/25/2015] [Indexed: 11/28/2022]
Abstract
The cervical fasciae have always represented a matter of debate. Indeed, in the literature, it is quite impossible to find two authors reporting the same description of the neck fascia. In the present review, a historical background was outlined, confirming that the Malgaigne's definition of the cervical fascia as an anatomical Proteus is widely justified. In an attempt to provide an essential and a more comprehensive classification, a fixed pattern of description of cervical fasciae is proposed. Based on the morphogenetic criteria, two fascial groups have been recognized: (1) fasciae which derive from primitive fibro-muscular laminae (muscular fasciae or myofasciae); (2) fasciae which derive from connective thickening (visceral fasciae). Topographic and comparative approaches allowed to distinguish three different types of fasciae in the neck: the superficial, the deep and the visceral fasciae. The first is most connected to the skin, the second to the muscles and the third to the viscera. The muscular fascia could be further divided into three layers according to the relationship with the different muscles.
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Affiliation(s)
- Gianfranco Natale
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, via Roma 55, 56126, Pisa, Italy
| | - Sara Condino
- EndoCAS Center, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Antonio Stecco
- Department of Internal Medicine, Sport Medicine Unit, University of Padua, Padua, Italy.
| | - Paola Soldani
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, via Roma 55, 56126, Pisa, Italy
| | | | - Marco Gesi
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, via Roma 55, 56126, Pisa, Italy. .,EndoCAS Center, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy.
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Nieminen P, Ryökäs E, Mustonen AM. Experiential thinking in creationism--a textual analysis. PLoS One 2015; 10:e0118314. [PMID: 25734650 PMCID: PMC4348421 DOI: 10.1371/journal.pone.0118314] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 01/13/2015] [Indexed: 11/19/2022] Open
Abstract
Creationism is a religiously motivated worldview in denial of biological evolution that has been very resistant to change. We performed a textual analysis by examining creationist and pro-evolutionary texts for aspects of "experiential thinking", a cognitive process different from scientific thought. We observed characteristics of experiential thinking as follows: testimonials (present in 100% of sampled creationist texts), such as quotations, were a major form of proof. Confirmation bias (100% of sampled texts) was represented by ignoring or dismissing information that would contradict the creationist hypothesis. Scientifically irrelevant or flawed information was re-interpreted as relevant for the falsification of evolution (75-90% of sampled texts). Evolutionary theory was associated to moral issues by demonizing scientists and linking evolutionary theory to atrocities (63-93% of sampled texts). Pro-evolutionary rebuttals of creationist claims also contained testimonials (93% of sampled texts) and referred to moral implications (80% of sampled texts) but displayed lower prevalences of stereotypical thinking (47% of sampled texts), confirmation bias (27% of sampled texts) and pseudodiagnostics (7% of sampled texts). The aspects of experiential thinking could also be interpreted as argumentative fallacies. Testimonials lead, for instance, to ad hominem and appeals to authorities. Confirmation bias and simplification of data give rise to hasty generalizations and false dilemmas. Moral issues lead to guilt by association and appeals to consequences. Experiential thinking and fallacies can contribute to false beliefs and the persistence of the claims. We propose that science educators would benefit from the systematic analysis of experiential thinking patterns and fallacies in creationist texts and pro-evolutionary rebuttals in order to concentrate on scientific misconceptions instead of the scientifically irrelevant aspects of the creationist-evolutionist debate.
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Affiliation(s)
- Petteri Nieminen
- University of Eastern Finland, Faculty of Health Sciences, School of Medicine, Department of Biomedicine/Anatomy, P.O. Box 1627, FI-70211, Kuopio, Finland
- University of Eastern Finland, Philosophical Faculty, School of Theology, P.O. Box 111, FI-80101, Joensuu, Finland
- * E-mail:
| | - Esko Ryökäs
- University of Eastern Finland, Philosophical Faculty, School of Theology, P.O. Box 111, FI-80101, Joensuu, Finland
| | - Anne-Mari Mustonen
- University of Eastern Finland, Faculty of Health Sciences, School of Medicine, Department of Biomedicine/Anatomy, P.O. Box 1627, FI-70211, Kuopio, Finland
- University of Eastern Finland, Faculty of Science and Forestry, Department of Biology, P.O. Box 111, FI-80101, Joensuu, Finland
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Esteve-Altava B, Diogo R, Smith C, Boughner JC, Rasskin-Gutman D. Anatomical networks reveal the musculoskeletal modularity of the human head. Sci Rep 2015; 5:8298. [PMID: 25656958 PMCID: PMC5389032 DOI: 10.1038/srep08298] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 01/14/2015] [Indexed: 11/09/2022] Open
Abstract
Mosaic evolution is a key mechanism that promotes robustness and evolvability in living beings. For the human head, to have a modular organization would imply that each phenotypic module could grow and function semi-independently. Delimiting the boundaries of head modules, and even assessing their existence, is essential to understand human evolution. Here we provide the first study of the human head using anatomical network analysis (AnNA), offering the most complete overview of the modularity of the head to date. Our analysis integrates the many biological dependences that tie hard and soft tissues together, arising as a consequence of development, growth, stresses and loads, and motion. We created an anatomical network model of the human head, where nodes represent anatomical units and links represent their physical articulations. The analysis of the human head network uncovers the presence of 10 musculoskeletal modules, deep-rooted in these biological dependences, of developmental and evolutionary significance. In sum, this study uncovers new anatomical and functional modules of the human head using a novel quantitative method that enables a more comprehensive understanding of the evolutionary anatomy of our lineage, including the evolution of facial expression and facial asymmetry.
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Affiliation(s)
- Borja Esteve-Altava
- Theoretical Biology Research Group, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, 46071 Valencia, Spain
| | - Rui Diogo
- Department of Anatomy, Howard Univ. College of Medicine, Washington, DC, USA
| | - Christopher Smith
- Department of Anatomy, Howard Univ. College of Medicine, Washington, DC, USA
| | - Julia C Boughner
- Department of Anatomy and Cell Biology, Univ. of Saskatchewan, Saskatoon, SK, Canada
| | - Diego Rasskin-Gutman
- Theoretical Biology Research Group, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, 46071 Valencia, Spain
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Santana SE, Dobson SD, Diogo R. Plain faces are more expressive: comparative study of facial colour, mobility and musculature in primates. Biol Lett 2014; 10:20140275. [PMID: 24850898 DOI: 10.1098/rsbl.2014.0275] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Facial colour patterns and facial expressions are among the most important phenotypic traits that primates use during social interactions. While colour patterns provide information about the sender's identity, expressions can communicate its behavioural intentions. Extrinsic factors, including social group size, have shaped the evolution of facial coloration and mobility, but intrinsic relationships and trade-offs likely operate in their evolution as well. We hypothesize that complex facial colour patterning could reduce how salient facial expressions appear to a receiver, and thus species with highly expressive faces would have evolved uniformly coloured faces. We test this hypothesis through a phylogenetic comparative study, and explore the underlying morphological factors of facial mobility. Supporting our hypothesis, we find that species with highly expressive faces have plain facial colour patterns. The number of facial muscles does not predict facial mobility; instead, species that are larger and have a larger facial nucleus have more expressive faces. This highlights a potential trade-off between facial mobility and colour patterning in primates and reveals complex relationships between facial features during primate evolution.
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Affiliation(s)
- Sharlene E Santana
- Department of Biology and Burke Museum, University of Washington, Seattle, WA 98195, USA
| | - Seth D Dobson
- Department of Anthropology, Dartmouth College, Hanover, NH 03755, USA
| | - Rui Diogo
- Department of Anatomy, Howard University, Washington, DC 20059, USA
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45
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Haidarliu S, Kleinfeld D, Deschênes M, Ahissar E. The Musculature That Drives Active Touch by Vibrissae and Nose in Mice. Anat Rec (Hoboken) 2014; 298:1347-58. [PMID: 25408106 DOI: 10.1002/ar.23102] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/21/2014] [Accepted: 10/26/2014] [Indexed: 11/06/2022]
Abstract
Coordinated action of facial muscles during whisking, sniffing, and touching objects is an important component of active sensing in rodents. Accumulating evidence suggests that the anatomical schemes that underlie active sensing are similar across the majority of whisking rodents. Intriguingly, however, muscle architecture in the mystacial pad of the mouse was reported to be different, possessing only one extrinsic vibrissa protracting muscle (M. nasalis) in the rostral part of the snout. In this study, the organization of the muscles that move the nose and the mystacial vibrissae in mice was re-examined and compared with that reported previously in other rodents. We found that muscle distribution within the mystacial pad and around the tip of the nose in mice is isomorphic with that found in other whisking rodents. In particular, in the rostral part of the mouse snout, we describe both protractors and retractors of the vibrissae. Nose movements are controlled by the M. dilator nasi and five subunits of the M. nasolabialis profundus, with involvement of the nasal cartilaginous skeleton as a mediator in the muscular effort translation.
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Affiliation(s)
- Sebastian Haidarliu
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
| | - David Kleinfeld
- Department of Physics and Section of Neurobiology, University of California at San Diego, La Jolla, California
| | - Martin Deschênes
- Department of Psychiatry and Neuroscience, Faculty of Medicine, Laval University, Québec City, Canada
| | - Ehud Ahissar
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
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Diogo R, Ziermann JM, Linde-Medina M. Specialize or risk disappearance - empirical evidence of anisomerism based on comparative and developmental studies of gnathostome head and limb musculature. Biol Rev Camb Philos Soc 2014; 90:964-78. [DOI: 10.1111/brv.12142] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 07/22/2014] [Accepted: 07/24/2014] [Indexed: 12/13/2022]
Affiliation(s)
- Rui Diogo
- Department of Anatomy; Howard University College of Medicine; Washington DC 20059 U.S.A
| | - Janine M. Ziermann
- Department of Anatomy; Howard University College of Medicine; Washington DC 20059 U.S.A
| | - Marta Linde-Medina
- Faculty of Life Sciences, University of Manchester; Manchester M3 9PT U.K
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Diogo R, Ziermann JM, Linde-Medina M. Is evolutionary biology becoming too politically correct? A reflection on the scala naturae, phylogenetically basal clades, anatomically plesiomorphic taxa, and 'lower' animals. Biol Rev Camb Philos Soc 2014; 90:502-21. [PMID: 24917249 DOI: 10.1111/brv.12121] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 04/28/2014] [Accepted: 05/13/2014] [Indexed: 11/30/2022]
Abstract
The notion of scala naturae dates back to thinkers such as Aristotle, who placed plants below animals and ranked the latter along a graded scale of complexity from 'lower' to 'higher' animals, such as humans. In the last decades, evolutionary biologists have tended to move from one extreme (i.e. the idea of scala naturae or the existence of a general evolutionary trend in complexity from 'lower' to "higher" taxa, with Homo sapiens as the end stage) to the other, opposite, extreme (i.e. to avoid using terms such as 'phylogenetically basal' and 'anatomically plesiomorphic' taxa, which are seen as the undesired vestige of old teleological theories). The latter view tries to avoid any possible connotations with the original anthropocentric idea of a scala naturae crowned by man and, in that sense, it can be regarded as a more politically correct view. In the past years and months there has been renewed interest in these topics, which have been discussed in various papers and monographs that tend to subscribe, in general, to the points defended in the more politically correct view. Importantly, most evolutionary and phylogenetic studies of tetrapods and other vertebrates, and therefore most discussions on the scala naturae and related issues have been based on hard tissue and, more recently, on molecular data. Here we provide the first discussion of these topics based on a comparative myological study of all the major vertebrate clades and of myological cladistic and Bayesian phylogenetic analyses of bony fish and tetrapods, including Primates. We specifically (i) contradict the notions of a scala naturae or evolutionary progressive trends leading to more complexity in 'higher' animals and culminating in Homo sapiens, and (ii) stress that the refutation of these old notions does not necessarily mean that one should not keep using the terms 'phylogenetically basal' and particularly 'anatomically plesiomorphic' to refer to groups such as the urodeles within the Tetrapoda, or the strepsirrhines and lemurs within the Primates, for instance. This review will contribute to improving our understanding of these broad evolutionary issues and of the evolution of the vertebrate Bauplans, and hopefully will stimulate future phylogenetic, evolutionary and developmental studies of these clades.
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Affiliation(s)
- Rui Diogo
- Department of Anatomy, Howard University College of Medicine, Washington, DC 20059, U.S.A
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Scheider L, Liebal K, Oña L, Burrows A, Waller B. A comparison of facial expression properties in five hylobatid species. Am J Primatol 2014; 76:618-28. [PMID: 24395677 DOI: 10.1002/ajp.22255] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 11/27/2013] [Accepted: 12/05/2013] [Indexed: 11/08/2022]
Abstract
Little is known about facial communication of lesser apes (family Hylobatidae) and how their facial expressions (and use of) relate to social organization. We investigated facial expressions (defined as combinations of facial movements) in social interactions of mated pairs in five different hylobatid species belonging to three different genera using a recently developed objective coding system, the Facial Action Coding System for hylobatid species (GibbonFACS). We described three important properties of their facial expressions and compared them between genera. First, we compared the rate of facial expressions, which was defined as the number of facial expressions per units of time. Second, we compared their repertoire size, defined as the number of different types of facial expressions used, independent of their frequency. Third, we compared the diversity of expression, defined as the repertoire weighted by the rate of use for each type of facial expression. We observed a higher rate and diversity of facial expression, but no larger repertoire, in Symphalangus (siamangs) compared to Hylobates and Nomascus species. In line with previous research, these results suggest siamangs differ from other hylobatids in certain aspects of their social behavior. To investigate whether differences in facial expressions are linked to hylobatid socio-ecology, we used a Phylogenetic General Least Square (PGLS) regression analysis to correlate those properties with two social factors: group-size and level of monogamy. No relationship between the properties of facial expressions and these socio-ecological factors was found. One explanation could be that facial expressions in hylobatid species are subject to phylogenetic inertia and do not differ sufficiently between species to reveal correlations with factors such as group size and monogamy level.
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Affiliation(s)
- Linda Scheider
- Department of Psychology, Freie Universität of Berlin, Berlin, Germany
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Haidarliu S, Kleinfeld D, Ahissar E. Mediation of muscular control of rhinarial motility in rats by the nasal cartilaginous skeleton. Anat Rec (Hoboken) 2013; 296:1821-32. [PMID: 24249396 PMCID: PMC4157211 DOI: 10.1002/ar.22822] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 08/29/2013] [Indexed: 11/12/2022]
Abstract
The rhinarium is the rostral-most area of the snout that surrounds the nostrils, and is hairless in most mammals. In rodents, it participates in coordinated behaviors, active tactile sensing, and active olfactory sensing. In rats, the rhinarium is firmly connected to the nasal cartilages, and its motility is determined by movements of the rostral end of the nasal cartilaginous skeleton (NCS). Here, we demonstrate the nature of different cartilaginous regions that form the rhinarium and the nasofacial muscles that deform these regions during movements of the NCS. These muscles, together with the dorsal nasal cartilage that is described here, function as a rhinarial motor plant.
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Affiliation(s)
- Sebastian Haidarliu
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
| | - David Kleinfeld
- Department of Physics and Section of Neurobiology, University of California at San Diego, La Jolla, CA 92093, USA
| | - Ehud Ahissar
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
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Cattaneo L, Pavesi G. The facial motor system. Neurosci Biobehav Rev 2013; 38:135-59. [PMID: 24239732 DOI: 10.1016/j.neubiorev.2013.11.002] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 10/18/2013] [Accepted: 11/02/2013] [Indexed: 12/23/2022]
Abstract
Facial movements support a variety of functions in human behavior. They participate in automatic somatic and visceral motor programs, they are essential in producing communicative displays of affective states and they are also subject to voluntary control. The multiplicity of functions of facial muscles, compared to limb muscles, is reflected in the heterogeneity of their anatomical and histological characteristics that goes well beyond the conventional classification in single facial muscles. Such parcellation in different functional muscular units is maintained throughout the central representation of facial movements from the brainstem up to the neocortex. Facial movements peculiarly lack a conventional proprioceptive feedback system, which is only in part vicariated by cutaneous or auditory afferents. Facial motor activity is the main marker of endogenous affective states and of the affective valence of external stimuli. At the cortical level, a complex network of specialized motor areas supports voluntary facial movements and, differently from upper limb movements, in such network there does not seem to be a prime actor in the primary motor cortex.
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Affiliation(s)
- Luigi Cattaneo
- Center for Mind/Brain Sciences, University of Trento, Via delle Regole 101, Mattarello, Trento 38123, Italy.
| | - Giovanni Pavesi
- Department of Neuroscience, University of Parma, Via Gramsci 14, Parma 43100, Italy
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