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Cebeiro A, Key A. Captive bonobos (Pan paniscus) apply precision grips when using flaked stone tools. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2024; 183:e24759. [PMID: 37218536 DOI: 10.1002/ajpa.24759] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 02/21/2023] [Accepted: 05/08/2023] [Indexed: 05/24/2023]
Abstract
OBJECTIVES Current evidence suggests that flaked stone tool technologies did not emerge until ~3.3-2.6 million-years-ago (Ma). It is often hypothesized that early hominin (principally Ardipithecus and early Australopithecus) manual anatomy may have prevented an earlier emergence, as the forceful precision grips essential to flake tool-use may have been ineffectively performed by these species. Marzke, Marchant, McGrew, and Reece (2015) observed potentially forceful pad-to-side precision grips being recruited by wild chimpanzees (Pan troglodytes) during feeding behaviors, indicating that Pan-like manual anatomy, and therefore potentially early hominin anatomy, may be capable of effectively securing flake stone tools during their use. MATERIALS AND METHODS Here, we report on the grips recruited by four captive, human-trained, bonobos (Pan paniscus) during the use of stone and organic tools, including flake stone tools during cutting behaviors. RESULTS It is revealed that pad-to-side precision grips are frequently recruited by these bonobos when securing stone flakes during cutting actions. In some instances, high forces could have been resisted and applied by the thumb and fingers. DISCUSSION While our analyzes are preliminary and limited to captive individuals, and Pan is not suggested to secure flakes with the same efficacy as Homo or Australopithecus, it points to early hominins potentially being able to perform the precision grips required to use flake stone tools. In turn, the ability to gain tangible benefits from the effective use of flake tools (i.e., gain energetic returns from processing food resources) may have been - at least anatomically - possible in early Australopithecus and other pre-Early Stone Age hominin species. In turn, hominin manual anatomy may not be a leading restriction on the emergence of the earliest stone tool technologies.
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Affiliation(s)
- Adela Cebeiro
- Department of Anthropology, New York University, New York, New York, USA
| | - Alastair Key
- Department of Archaeology, University of Cambridge, Cambridge, UK
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Salmi R, Le K, Silva JM, Conceição DP, Presotto A, Rodrigues Dos Santos R. Hand preference in wild crab-eating capuchin monkeys (Sapajus libidinosus) in the coastal area of Northest Brazil. Am J Primatol 2023; 85:e23546. [PMID: 37635447 DOI: 10.1002/ajp.23546] [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: 04/17/2023] [Revised: 08/01/2023] [Accepted: 08/16/2023] [Indexed: 08/29/2023]
Abstract
Handedness is a fundamental human trait, although recent research, especially on nonhuman primates, has shown that it is displayed by other animals as well (e.g., chimpanzees, gorillas). In this study, we explore hand preference in wild crab-eating tufted capuchin monkeys (Sapajus libidinosus) inhabiting a mangrove forest located on the coastal area of Northeast Brazil (Maranhão State). Tufted capuchin monkeys at our site use facultatively wooden tools to crack open crabs. We observed hand preference in 12 subjects who spontaneously participated in experiment sessions, in which we provided crabs and tools on wooden platforms. We recorded (using events and bouts) two unimanual tasks, (tool or crab) grabbing and (tool or crab) pounding, and one bimanual task, crab pulling, where one hand kept the crab in place while the other pulled off parts of the crab. Hand preference increased with greater strength needed to perform the task and its complexity. While only 17%-25% of capuchins showed hand preference during grabbing, 44%-64% showed hand preference during pounding, and most subjects 64%-80% displayed a right-hand preference when performing the bimanual task, for which all lateralized individuals were right-handed. Hand preference did not vary between adults and juvenile individuals and was not consistent across tasks. Group-level hand preference was found only for the bimanual task, for which all lateralized individuals were right-handed. Our findings are in concordance with those of other primate studies showing the emergence of hemispheric specialization for bimanual actions, highlight the importance of conducting such studies on diverse type of tasks, and show the feasibility to conduct experimental manipulation under natural conditions.
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Affiliation(s)
- Roberta Salmi
- Department of Anthropology, University of Georgia, Athens, Georgia, USA
- Mangrove Primate Center, Maranhão State, Brazil
| | - Kristie Le
- Department of Anthropology, University of Georgia, Athens, Georgia, USA
| | - Jardeani M Silva
- Programa de Pós-Graduação em Biodiversidade e Conservação, Universidade Federal do Maranhão, São Luís, Brazil
| | - Daiana P Conceição
- Programa de Pós-Graduação em Biodiversidade e Conservação, Universidade Federal do Maranhão, São Luís, Brazil
| | - Andrea Presotto
- Mangrove Primate Center, Maranhão State, Brazil
- Department of Geography and Geosciences, Salisbury University, Salisbury, Maryland, USA
| | - Ricardo Rodrigues Dos Santos
- Mangrove Primate Center, Maranhão State, Brazil
- Centro de Ciências Agrárias e Ambientais, Universidade Federal do Maranhão, Sao Luis, Brazil
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3
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Hernández-Arteaga E, Cruz-Aguilar MA, Hernández-González M, Guevara MA, Ramírez-Salado I, Rivera-García AP. New bands in the sleep stages of spider monkeys (Ateles geoffroyi): Electroencephalographic correlations and spatial distribution. Am J Primatol 2023; 85:e23541. [PMID: 37530429 DOI: 10.1002/ajp.23541] [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: 11/06/2022] [Revised: 07/10/2023] [Accepted: 07/24/2023] [Indexed: 08/03/2023]
Abstract
The study of electroencephalographic (EEG) signals in nonhuman primates has led to important discoveries in neurophysiology and sleep behavior. Several studies have analyzed digital EEG data from primate species with prehensile tails, like the spider monkey, and principal component analysis has led to the identification of new EEG bands and their spatial distribution during sleep and wakefulness in these monkeys. However, the spatial location of the EEG correlations of these new bands during the sleep-wake cycle in the spider monkey has not yet been explored. Thus, the objective of this study was to determine the spatial distribution of EEG correlations in the new bands during wakefulness, rapid eye movement (REM) sleep, and non-REM sleep in this species. EEG signals were obtained from the scalp of six monkeys housed in experimental conditions in a laboratory setting. Regarding the 1-21 Hz band, a significant correlation between left frontal and central regions was recorded during non-REM 2 sleep. In the REM sleep, a significant correlation between these cortical areas was seen in two bands: 1-3 and 3-13 Hz. This reflects a modification of the degree of coupling between the cortical areas studied, associated with the distinct stages of sleep. The intrahemispheric EEG correlation found between left perceptual and motor regions during sleep in the spider monkey could indicate activation of a neural circuit for the processing of environmental information that plays a critical role in monitoring the danger of nocturnal predation.
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Affiliation(s)
| | - Manuel A Cruz-Aguilar
- Laboratorio de Cronobiología y Sueño, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Dirección de Investigaciones en Neurociencias, CDMX, México
| | - Marisela Hernández-González
- Laboratorio de Neurofisiología de la Conducta Reproductiva, Instituto de Neurociencias, CUCBA, Universidad de Guadalajara, Guadalajara, México
| | - Miguel A Guevara
- Laboratorio de Correlación Electroencefalográfica y Conducta, Instituto de Neurociencias, CUCBA, Universidad de Guadalajara, Guadalajara, México
| | - Ignacio Ramírez-Salado
- Laboratorio de Cronobiología y Sueño, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Dirección de Investigaciones en Neurociencias, CDMX, México
| | - Ana P Rivera-García
- Laboratorio de Cronobiología y Sueño, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Dirección de Investigaciones en Neurociencias, CDMX, México
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Ocklenburg S, El Basbasse Y, Ströckens F, Müller-Alcazar A. Hemispheric asymmetries and brain size in mammals. Commun Biol 2023; 6:521. [PMID: 37188844 PMCID: PMC10185570 DOI: 10.1038/s42003-023-04894-z] [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: 12/16/2022] [Accepted: 05/02/2023] [Indexed: 05/17/2023] Open
Abstract
Hemispheric asymmetries differ considerably across species, but the neurophysiological base of this variation is unclear. It has been suggested that hemispheric asymmetries evolved to bypass interhemispheric conduction delay when performing time-critical tasks. This implies that large brains should be more asymmetric. We performed preregistered cross-species meta-regressions with brain mass and neuron number as predictors for limb preferences, a behavioral marker of hemispheric asymmetries, in mammals. Brain mass and neuron number showed positive associations with rightward limb preferences but negative associations with leftward limb preferences. No significant associations were found for ambilaterality. These results are only partly in line with the idea that conduction delay is the critical factor that drives the evolution of hemispheric asymmetries. They suggest that larger-brained species tend to shift towards more right-lateralized individuals. Therefore, the need for coordination of lateralized responses in social species needs to be considered in the context of the evolution of hemispheric asymmetries.
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Affiliation(s)
- Sebastian Ocklenburg
- Department of Psychology, MSH Medical School Hamburg, Hamburg, Germany.
- Institute for Cognitive and Affective Neuroscience, MSH Medical School Hamburg, Hamburg, Germany.
- Biopsychology, Institute for Cognitive Neuroscience, Ruhr University Bochum, Bochum, Germany.
| | - Yasmin El Basbasse
- Biopsychology, Institute for Cognitive Neuroscience, Ruhr University Bochum, Bochum, Germany
| | - Felix Ströckens
- C. & O. Vogt Institute for Brain Research, University Hospital Düsseldorf, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Anett Müller-Alcazar
- Department of Psychology, MSH Medical School Hamburg, Hamburg, Germany
- Institute for Cognitive and Affective Neuroscience, MSH Medical School Hamburg, Hamburg, Germany
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Fu W, Xu J, Wang X, Li Y, He S, Wang C, Ren Y, Yang B, Wu T, Wang Y, Li B. Consistency of limb preference across unimanual feeding, bipedal locomotion, and social grooming in golden snub-nosed monkeys ( Rhinopithecus roxellana). Laterality 2023; 28:32-47. [PMID: 36859828 DOI: 10.1080/1357650x.2022.2141251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The golden snub-nosed monkey (Rhinopithecus roxellana) is a typical arboreal group-living Old World primate. While limb preference has been extensively studied in this species, limb preference consistency has not yet been explored. Here, based on 26 R. roxellana adults, we investigated whether individuals exhibit consistent motor biases in manual- (e.g., unimanual feeding and social grooming) and foot-related (e.g., bipedal locomotion) tasks and whether limb preference consistency is influenced by increased social interactions during social grooming. Results showed no consistency in the direction or strength of limb preference among tasks, except for lateral strength in handedness for unimanual feeding and footedness in the initiation of locomotion. Population-level foot preference was only found among right-handers. Marked lateral bias was found in unimanual feeding, indicating that it may be a sensitive behavioural measure for assessing manual preference, especially for provisioned populations. This study not only improves our understanding of the relationship between hand and foot preference in R. roxellana but also reveals potential differential hemispheric regulation of limb preference and the influence of increased social interaction on handedness consistency.
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Affiliation(s)
- Weiwei Fu
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an, People's Republic of China
| | - Jianghui Xu
- Shaanxi Key Laboratory for Animal Conservation, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Xiaowei Wang
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an, People's Republic of China
| | - Yongbo Li
- Shaanxi Key Laboratory for Animal Conservation, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Shujun He
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an, People's Republic of China
| | - Chengliang Wang
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an, People's Republic of China
| | - Yi Ren
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an, People's Republic of China
| | - Bin Yang
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an, People's Republic of China
| | - Tong Wu
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an, People's Republic of China
| | - Yan Wang
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an, People's Republic of China
| | - Baoguo Li
- Shaanxi Key Laboratory for Animal Conservation, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
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Caspar KR, Pallasdies F, Mader L, Sartorelli H, Begall S. The evolution and biological correlates of hand preferences in anthropoid primates. eLife 2022; 11:e77875. [PMID: 36454207 PMCID: PMC9714969 DOI: 10.7554/elife.77875] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 10/07/2022] [Indexed: 12/02/2022] Open
Abstract
The evolution of human right-handedness has been intensively debated for decades. Manual lateralization patterns in non-human primates have the potential to elucidate evolutionary determinants of human handedness, but restricted species samples and inconsistent methodologies have so far limited comparative phylogenetic studies. By combining original data with published literature reports, we assembled data on hand preferences for standardized object manipulation in 1786 individuals from 38 species of anthropoid primates, including monkeys, apes, and humans. Based on that, we employ quantitative phylogenetic methods to test prevalent hypotheses on the roles of ecology, brain size, and tool use in primate handedness evolution. We confirm that human right-handedness represents an unparalleled extreme among anthropoids and found taxa displaying population-level handedness to be rare. Species-level direction of manual lateralization was largely uniform among non-human primates and did not strongly correlate with any of the selected biological predictors, nor with phylogeny. In contrast, we recovered highly variable patterns of hand preference strength, which show signatures of both ecology and phylogeny. In particular, terrestrial primates tend to display weaker hand preferences than arboreal species. These results challenge popular ideas on primate handedness evolution, including the postural origins hypothesis. Furthermore, they point to a potential adaptive benefit of disparate lateralization strength in primates, a measure of hand preference that has often been overlooked in the past. Finally, our data show that human lateralization patterns do not align with trends found among other anthropoids, suggesting that unique selective pressures gave rise to the unusual hand preferences of our species.
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Affiliation(s)
- Kai R Caspar
- Department of General Zoology, University of Duisburg-EssenEssenGermany
- Department of Game Management and Wildlife Biology, Faculty of Forestry and Wood Sciences, Czech University of Life SciencesPrahaCzech Republic
| | - Fabian Pallasdies
- Institute for Theoretical Biology, Department of Biology, Humboldt-Universität zu BerlinBerlinGermany
| | - Larissa Mader
- Department of General Zoology, University of Duisburg-EssenEssenGermany
| | | | - Sabine Begall
- Department of General Zoology, University of Duisburg-EssenEssenGermany
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Laméris DW, Verspeek J, Salas M, Staes N, Torfs JRR, Eens M, Stevens JMG. Evaluating Self-Directed Behaviours and Their Association with Emotional Arousal across Two Cognitive Tasks in Bonobos ( Pan paniscus). Animals (Basel) 2022; 12:3002. [PMID: 36359126 PMCID: PMC9656221 DOI: 10.3390/ani12213002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/22/2022] [Accepted: 10/28/2022] [Indexed: 09/08/2024] Open
Abstract
Self-directed behaviours (SDBs) are widely used as markers of emotional arousal in primates, and are commonly linked to negative arousal, or are used as indicators of stress or poor welfare. However, recent studies suggest that not all SDBs have the same function. Moreover, lateralisation in the production of these behaviours has been suggested to be associated with emotional processing. Hence, a better understanding of the production and the asymmetry of these displacement behaviours is needed in a wider range of species in order to confirm their reliability as indicators of emotional arousal. In the current study, we experimentally evaluated the production and asymmetry of SDBs in zoo-housed bonobos during two cognitive touchscreen tasks. Overall, nose wipes were most commonly observed, followed by gentle self-scratches, and rough self-scratches. The rates of nose wipes and rough self-scratches increased with incorrect responses, suggesting that these behaviours indicate arousal and possibly frustration. Rough self-scratching was additionally more directed towards the left hemispace after incorrect responses. In contrast, gentle self-scratching increased after correct responses in one study, possibly linking it with positive arousal. We also tested if left-handed bonobos showed greater behavioural reactivity towards incorrect responses, but found no evidence to confirm this hypothesis. Our results shed light on potential different mechanisms behind separate SDBs. We therefore provide nuance to the use of SDBs as indicator of emotional arousal in bonobos.
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Affiliation(s)
- Daan W. Laméris
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Wilrijk, Belgium
- Antwerp ZOO Centre for Research & Conservation (CRC), Royal Zoological Society of Antwerp (RZSA), 2018 Antwerp, Belgium
| | - Jonas Verspeek
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Wilrijk, Belgium
- Antwerp ZOO Centre for Research & Conservation (CRC), Royal Zoological Society of Antwerp (RZSA), 2018 Antwerp, Belgium
| | - Marina Salas
- Antwerp ZOO Centre for Research & Conservation (CRC), Royal Zoological Society of Antwerp (RZSA), 2018 Antwerp, Belgium
| | - Nicky Staes
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Wilrijk, Belgium
- Antwerp ZOO Centre for Research & Conservation (CRC), Royal Zoological Society of Antwerp (RZSA), 2018 Antwerp, Belgium
| | - Jonas R. R. Torfs
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Wilrijk, Belgium
- Antwerp ZOO Centre for Research & Conservation (CRC), Royal Zoological Society of Antwerp (RZSA), 2018 Antwerp, Belgium
| | - Marcel Eens
- Antwerp ZOO Centre for Research & Conservation (CRC), Royal Zoological Society of Antwerp (RZSA), 2018 Antwerp, Belgium
| | - Jeroen M. G. Stevens
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, 2610 Wilrijk, Belgium
- SALTO, Agro- and Biotechnology, Odisee University College, 1000 Brussels, Belgium
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Limb Preference in Animals: New Insights into the Evolution of Manual Laterality in Hominids. Symmetry (Basel) 2022. [DOI: 10.3390/sym14010096] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Until the 1990s, the notion of brain lateralization—the division of labor between the two hemispheres—and its more visible behavioral manifestation, handedness, remained fiercely defined as a human specific trait. Since then, many studies have evidenced lateralized functions in a wide range of species, including both vertebrates and invertebrates. In this review, we highlight the great contribution of comparative research to the understanding of human handedness’ evolutionary and developmental pathways, by distinguishing animal forelimb asymmetries for functionally different actions—i.e., potentially depending on different hemispheric specializations. Firstly, lateralization for the manipulation of inanimate objects has been associated with genetic and ontogenetic factors, with specific brain regions’ activity, and with morphological limb specializations. These could have emerged under selective pressures notably related to the animal locomotion and social styles. Secondly, lateralization for actions directed to living targets (to self or conspecifics) seems to be in relationship with the brain lateralization for emotion processing. Thirdly, findings on primates’ hand preferences for communicative gestures accounts for a link between gestural laterality and a left-hemispheric specialization for intentional communication and language. Throughout this review, we highlight the value of functional neuroimaging and developmental approaches to shed light on the mechanisms underlying human handedness.
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Boulinguez-Ambroise G, Pouydebat E, Disarbois É, Meguerditchian A. Maternal cradling bias in baboons: The first environmental factor affecting early infant handedness development? Dev Sci 2021; 25:e13179. [PMID: 34626051 DOI: 10.1111/desc.13179] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 09/25/2021] [Accepted: 09/28/2021] [Indexed: 01/19/2023]
Abstract
The most emblematic behavioral manifestation of human brain asymmetries is handedness. While the precise mechanisms behind the development of handedness are still widely debated, empirical evidences highlight that besides genetic factors, environmental factors may play a crucial role. As one of these factors, maternal cradling behavior may play a key role in the emergence of early handedness in the offspring. In the present study we followed 41 Papio anubis infants living in social groups with their mother for which direction (e.g., left- or right-arm) and degree of maternal cradling-side bias were available from a previous published study. We assessed hand preferences for an unimanual grasping task at three developmental stages: (A) 0-4, (B) 4-6, and (C) 9-10 months of age. We found that individual hand preferences for grasping exist as soon as the first months of age, with a population-level left-handedness predominance, being stable until 6 months; to wit the period during which juveniles are mainly carried by their mothers. More importantly, this early postnatal handedness is positively correlated with maternal cradling lateralization. Interestingly, hand preferences assessed later in the development, once juveniles are no longer carried (i.e., from 9 to 10 months of age), are less dependent from the maternal cradling bias and less consistent with the earlier developmental stages, especially in infants initially cradled on the right maternal side. Our findings suggest that the ontogenetic dynamics of the infant's hand preference and its changes might ultimately rely on the degree of infant dependence from the mother across development.
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Affiliation(s)
- Grégoire Boulinguez-Ambroise
- Laboratoire de Psychologie Cognitive UMR7290, CNRS, Institut Language, Communication and the Brain, Aix-Marseille Univ, Paris, France.,Station de Primatologie CNRS, Rousset-sur-Arc, Paris, France.,Mecanismes Adaptatifs et Évolution UMR 7179-CNRS - National Museum of Natural History, Paris, France
| | - Emmanuelle Pouydebat
- Mecanismes Adaptatifs et Évolution UMR 7179-CNRS - National Museum of Natural History, Paris, France
| | - Éloïse Disarbois
- Laboratoire de Psychologie Cognitive UMR7290, CNRS, Institut Language, Communication and the Brain, Aix-Marseille Univ, Paris, France
| | - Adrien Meguerditchian
- Laboratoire de Psychologie Cognitive UMR7290, CNRS, Institut Language, Communication and the Brain, Aix-Marseille Univ, Paris, France.,Station de Primatologie CNRS, Rousset-sur-Arc, Paris, France
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Díaz S, Murray L, Roberts SG, Rodway P. Between-task consistency, temporal stability and the role of posture in simple reach and fishing hand preference in chimpanzees (Pan troglodytes). Appl Anim Behav Sci 2021. [DOI: 10.1016/j.applanim.2021.105417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Tamura M, Akomo-Okoue EF. Hand preference in unimanual and bimanual coordinated tasks in wild western lowland gorillas (Gorilla gorilla gorilla) feeding on African ginger (Zingiberaceae). AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2021; 175:531-545. [PMID: 33429467 DOI: 10.1002/ajpa.24227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 12/24/2020] [Accepted: 12/28/2020] [Indexed: 11/10/2022]
Abstract
OBJECTIVES Bimanual coordinated behaviors are critical for detecting robust individual hand preference in nonhuman primates but are particularly challenging to observe in the wild. This study focuses on spontaneous feeding behavior on African ginger (Aframomum sp. and Renealmia sp.), which involves a unimanual task (reaching and pulling out a ginger stem) and a bimanual coordinated task (extracting pith from a ginger stem) by wild western lowland gorillas. MATERIALS AND METHODS Study subjects were 21 gorillas in the Moukalaba-Doudou National Park, Gabon. We examined whether they exhibit significant hand preference at the individual and group levels for both tasks. RESULTS Sixteen gorillas showed significant hand preference in the unimanual task, whereas all 21 individuals showed significant hand preference in the bimanual coordinated task. Hand preference was significantly stronger in the bimanual coordinated task than in the unimanual task. It is noteworthy that gorillas showed a significant right-hand preference at the group level for the bimanual task (roughly 70% of the subjects). DISCUSSION This study confirmed that bimanual coordinated tasks are more sensitive in detecting hand preferences in nonhuman primates. In addition to the bimanual nature of the task, the precision grip for processing and the importance of African ginger as a food resource might influence the expression of hand preference. Evidence of a group-level right-hand preference may support the "postural origins theory." Because all wild African great apes feed on the pith of African ginger, comparing this task and its hand preferences can contribute toward a better understanding of the evolution of handedness in Hominidae.
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Affiliation(s)
- Masaya Tamura
- Laboratory of Human Evolution Studies, Graduate School of Science, Kyoto University, Kyoto, Japan
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12
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Fu W, Wang C, Ren Y, Wang Y, Qiao M, Wang X, Li B. Laterality of tail wrapping in golden snub-nosed monkeys ( Rhinopithecus roxellana). Laterality 2021; 26:201-212. [PMID: 33616011 DOI: 10.1080/1357650x.2021.1887208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Behavioural laterality in nonhuman primates has been commonly studied in paired limb organs, and studies in unpaired organs such as tails are less common. The very limited investigations on tail laterality have focused on New World primates. We firstly investigated the lateral bias of tail wrapping in an Old World primate. From a wild group of one hundred of golden snub-nosed monkeys (Rhinopithecus roxellana), 14 adult monkeys, 7 males and 7 females, were chosen as focus animals. The data of tail wrapping in two different postures that were resting on the ground and climbing the tree trunk were collected and analyzed. The results demonstrated (1) that, when resting on the ground, the focus animals, 3 showed right-side tail-wrapping preference and 11 were ambipreferent; (2) that there was a population-level right tail-wrapping preference in climbing, and 9 of them showed right-side preference, 1 left-side preference and 4 were ambipreferent; (3) and that there were no significant sex differences on the direction and strength of tail wrapping laterality. These findings provide significant evidence for a difference of cerebral asymmetries in tail-wrapping control and would be valuable for further understanding the important function of tails in Old World primates.
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Affiliation(s)
- Weiwei Fu
- Shaanxi Key Laboratory for Animal Conservation, Institute of Zoology, Shaanxi Academy of Sciences, Xi'an, People's Republic of China
| | - Chengliang Wang
- Shaanxi Key Laboratory for Animal Conservation, Institute of Zoology, Shaanxi Academy of Sciences, Xi'an, People's Republic of China
| | - Yi Ren
- Shaanxi Key Laboratory for Animal Conservation, Institute of Zoology, Shaanxi Academy of Sciences, Xi'an, People's Republic of China
| | - Yan Wang
- Shaanxi Key Laboratory for Animal Conservation, Institute of Zoology, Shaanxi Academy of Sciences, Xi'an, People's Republic of China
| | - Mingwen Qiao
- School of Foreign Studies, Weinan Normal University, Weinan, People's Republic
| | - Xiaowei Wang
- Shaanxi Key Laboratory for Animal Conservation, Institute of Zoology, Shaanxi Academy of Sciences, Xi'an, People's Republic of China
| | - Baoguo Li
- Shaanxi Key Laboratory for Animal Conservation, College of Life Sciences, Northwest University, Xi'an, People's Republic of China.,Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, People's Republic of China
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Vallortigara G. Laterality for the next decade: Computational ethology and the search for minimal condition for cognitive asymmetry. Laterality 2021; 26:303-306. [PMID: 33413000 DOI: 10.1080/1357650x.2020.1870122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In this comment to Ocklenburg et al.'s paper I stressed the contribution that computational ethology can provide to the accurate tracking of lateralized behaviour in a variety of species; I also discussed how current interest in so-called «minimal cognition» may help to disentangle shared and species-specific mechanisms of brain and behavioural asymmetries.
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Abstract
While non-human primate studies have long been conducted in laboratories, and more recently at zoological parks, sanctuaries are increasingly considered a viable setting for research. Accredited sanctuaries in non-range countries house thousands of primates formerly used as subjects of medical research, trained performers or personal pets. In range countries, however, sanctuaries typically house orphaned primates confiscated from illegal poaching and the bushmeat and pet trafficking trades. Although the primary mission of these sanctuaries is to rescue and rehabilitate residents, many of these organizations are increasingly willing to participate in non-invasive research. Notably, from a scientific standpoint, most sanctuaries provide potential advantages over traditional settings, such as large, naturalistic physical and social environments which may result in more relevant models of primates' free-ranging wild counterparts than other captive settings. As a result, an impressive scope of research in the fields of primate behaviour, cognition, veterinary science, genetics and physiology have been studied in sanctuaries. In this review, we examine the range and form of research that has been conducted at accredited sanctuaries around the world. We also describe the potential challenges of sanctuary-based work and the considerations that external researchers may face when deciding to collaborate with primate sanctuaries on their research projects.
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Affiliation(s)
- Stephen R Ross
- Lester E. Fisher Center for the Study and Conservation of Apes, Lincoln Park Zoo, 2001 North Clark St., Chicago, IL 60614, USA
| | - Jesse G Leinwand
- Lester E. Fisher Center for the Study and Conservation of Apes, Lincoln Park Zoo, 2001 North Clark St., Chicago, IL 60614, USA
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Short and long-term temporal consistency of hand preference in sanctuary chimpanzees (Pan troglodytes) for unimanual and bimanual coordinated tasks. Behav Processes 2019; 167:103911. [DOI: 10.1016/j.beproc.2019.103911] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 07/10/2019] [Accepted: 07/19/2019] [Indexed: 01/31/2023]
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16
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Fu WW, Wang XW, Wang CL, Zhao HT, Ren Y, Li BG. Effects of age, sex and manual task on hand preference in wild Rhinopithecus roxellana. Zool Res 2019; 40:129-138. [PMID: 30559334 PMCID: PMC6378565 DOI: 10.24272/j.issn.2095-8137.2019.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Golden snub-nosed monkeys (Rhinopithecus roxellana), as typical arboreal group-living Old World monkeys, provide an appropriate animal model to research manual laterality and explore the factors affecting hand preference in nonhuman primates. This study investigated hand preference based on 63 subjects and four spontaneous manual tasks (including unimanual and bimanual feeding and grooming), and assessed the effects of age, gender and type of task on handedness in R. roxellana. A population-level left-handedness was found not only in the bimanual coordinated tasks (bimanual feeding and grooming), but also in one unimanual reaching task (unimanual feeding). There were no significant differences between the sexes in either direction or strength of hand preference among any task. However, a significant difference between adults and juveniles was found in the unimanual feeding task. This is the first report on handedness in unimanual and bimanual feeding tasks that require bipedal posture in wild R. roxellana. Furthermore, this study demonstrated spontaneous feeding tasks reported previously only in the quadrupedal posture in this species, supporting the importance of factors such as posture and task complexity in the evolution of primate manual lateralization.
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Affiliation(s)
- Wei-Wei Fu
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an Shaanxi 710032, China
| | - Xiao-Wei Wang
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an Shaanxi 710032, China; E-mail:
| | - Cheng-Liang Wang
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an Shaanxi 710032, China
| | - Hai-Tao Zhao
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an Shaanxi 710032, China
| | - Yi Ren
- Shaanxi Key Laboratory for Animal Conservation, Shaanxi Institute of Zoology, Xi'an Shaanxi 710032, China
| | - Bao-Guo Li
- Shaanxi Key Laboratory for Animal Conservation, College of Life Sciences, Northwest University, Xi'an Shaanxi 710069, China; E-mail:.,Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming Yunnan 650223, China
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Ocklenburg S, Isparta S, Peterburs J, Papadatou-Pastou M. Paw preferences in cats and dogs: Meta-analysis. Laterality 2019; 24:647-677. [DOI: 10.1080/1357650x.2019.1578228] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Sebastian Ocklenburg
- Biopsychology, Department of Psychology, Institute of Cognitive Neuroscience, Ruhr-University Bochum, Bochum, Germany
| | - Sevim Isparta
- Biopsychology, Department of Psychology, Institute of Cognitive Neuroscience, Ruhr-University Bochum, Bochum, Germany
- Department of Genetics, Faculty of Veterinary Medicine, Ankara University, Ankara, Turkey
| | - Jutta Peterburs
- Biological Psychology, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Marietta Papadatou-Pastou
- School of Education, Department of Primary Education, National and Kapodistrian University of Athens, Athens, Greece
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18
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Prieur J, Lemasson A, Barbu S, Blois‐Heulin C. History, development and current advances concerning the evolutionary roots of human right‐handedness and language: Brain lateralisation and manual laterality in non‐human primates. Ethology 2018. [DOI: 10.1111/eth.12827] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jacques Prieur
- CNRS, EthoS (Ethologie animale et humaine) – UMR 6552 Universite de Rennes, Normandie Universite Paimpont France
| | - Alban Lemasson
- CNRS, EthoS (Ethologie animale et humaine) – UMR 6552 Universite de Rennes, Normandie Universite Paimpont France
| | - Stéphanie Barbu
- CNRS, EthoS (Ethologie animale et humaine) – UMR 6552 Universite de Rennes, Normandie Universite Paimpont France
| | - Catherine Blois‐Heulin
- CNRS, EthoS (Ethologie animale et humaine) – UMR 6552 Universite de Rennes, Normandie Universite Paimpont France
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19
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Regaiolli B, Spiezio C, Hopkins WD. Asymmetries in mother-infant behaviour in Barbary macaques ( Macaca sylvanus). PeerJ 2018; 6:e4736. [PMID: 29761052 PMCID: PMC5947039 DOI: 10.7717/peerj.4736] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 04/19/2018] [Indexed: 11/20/2022] Open
Abstract
Asymmetries in the maternal behaviour and anatomy might play an important role in the development of primate manual lateralization. In particular, early life asymmetries in mother’s and infant’s behaviour have been suggested to be associated with the development of the hand preference of the offspring. The aim of this study was to investigate the presence of behavioural asymmetries in different behavioural categories of mother-infant dyads of zoo-living Barbary macaques (Macaca sylvanus). The study subjects were 14 Barbary macaques involved in seven mother-infant dyads housed in Parco Natura Viva, Italy. For the mothers, bouts of hand preference for maternal cradling and infant retrieval were collected. For the infants, we focused on nipple preference and hand preference for clinging on mother ventrum. Moreover, we collected bouts of hand preference for food reaching in both groups. No significant group-level bias was found for any of the behavioural categories in either mothers or infants. However, at the individual level, six out of seven mothers showed a significant cradling bias, three toward the right hand and three toward the left hand. Moreover, all infants showed a significant nipple preference, six toward the mother’s right nipple, one toward the left nipple. Furthermore, a significant correlation was found between the infant nipple preference and their hand preference for food reaching, suggesting that maternal environment rather than behaviour might affect the development of hand preference in Old World monkeys. Our findings seem partially to add to previous literature on perceptual lateralization in different species of non-primate mammals, reporting a lateral bias in mother-infant interactions. Given the incongruences between our study and previous research in great apes and humans, our results seem to suggest possible phylogenetic differences in the lateralization of mothers and infants within the Primates order.
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Affiliation(s)
- Barbara Regaiolli
- Research & Conservation Department, Parco Natura Viva-Garda Zoological Park, Verona, Italy
| | - Caterina Spiezio
- Research & Conservation Department, Parco Natura Viva-Garda Zoological Park, Verona, Italy
| | - William Donald Hopkins
- Neuroscience Institute and Language Research Center, Georgia State University, Atlanta, GA, United States of America
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Poindexter SA, Reinhardt KD, Nijman V, Nekaris KAI. Slow lorises (Nycticebus spp.) display evidence of handedness in the wild and in captivity. Laterality 2018; 23:705-721. [PMID: 29607706 DOI: 10.1080/1357650x.2018.1457046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
It has been suggested that strepsirrhines (lemurs, lorises, and galagos) retain the more primitive left-hand preference, whilst monkeys and apes more regularly display a right-hand preference at the individual-level. We looked to address questions of laterality in the slow loris (Nycticebus spp.) using spontaneous observations of 7 wild individuals, unimanual tests in 6 captive individuals, and photos of 42 individuals in a bilateral posture assessing handedness at the individual- and group-level. During the unimanual reach task, we found at the individual-level, only 4 slow lorises showed a hand use bias (R: 3, L: 1), Handedness index (HI) ranged from -0.57 to 1.00. In the wild unimanual grasp task, we found at the individual-level two individual showed a right-hand bias, the HI ranged from -0.19 to 0.70. The bilateral venom pose showed a trend toward a right-hand dominant grip in those photographed in captivity, but an ambiguous difference in wild individuals. There are many environmental constraints in captivity that wild animals do not face, thus data collected in wild settings are more representative of their natural state. The presence of right-handedness in these species suggests that there is a need to re-evaluate the evolution of handedness in primates.
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Affiliation(s)
- Stephanie A Poindexter
- a Department of Social Sciences , Oxford Brookes University , Oxford , UK.,b Nocturnal Primate Research Group , Oxford , UK.,c The Little Fireface Project , West Java , Indonesia
| | - Kathleen D Reinhardt
- a Department of Social Sciences , Oxford Brookes University , Oxford , UK.,b Nocturnal Primate Research Group , Oxford , UK.,c The Little Fireface Project , West Java , Indonesia
| | - Vincent Nijman
- a Department of Social Sciences , Oxford Brookes University , Oxford , UK.,b Nocturnal Primate Research Group , Oxford , UK
| | - K A I Nekaris
- a Department of Social Sciences , Oxford Brookes University , Oxford , UK.,b Nocturnal Primate Research Group , Oxford , UK.,c The Little Fireface Project , West Java , Indonesia
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Manns M, Ströckens F, Stavenhagen P, Ocklenburg S. Paw preferences in the Asian small-clawed otter - using an inexpensive, video-based protocol to study laterality of rare species in the zoo. Laterality 2018; 23:722-737. [PMID: 29580172 DOI: 10.1080/1357650x.2018.1457047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
It is still debated whether limb-use preferences represent a common trait in vertebrates, which is based on a shared phylogenetic history. Unravelling the evolutionary origin and pattern of paw preferences in vertebrates requires the analysis of a larger number of species within an ecologically relevant setting. We therefore investigated whether observations in a zoo enable the collection of reliable data sets by quantifying paw use in two independent groups of Asian small-clawed otters (Amblonyx cinerea). Employing a continuous focal animal sampling method, each day one of the ten individuals was video recorded from outside of the enclosure during usual activity. We selected four types of unimanual behaviour (reaching for food, reaching for non-food, reaching into a hole, carrying an object) and quantified paw use for each animal. Our study provides first evidences for individual paw preferences in otters, which were in line with previously reported forelimb use pattern in carnivoran species. Preferences differed between motor acts but for "reaching into a hole" a population-level right paw bias was detected. These data support that observations in a zoological setting are useful to explore task-dependent paw preferences and may facilitate future studies investigating paw preferences under experimentally controlled conditions.
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Affiliation(s)
- Martina Manns
- a Department of Psychology , Institute of Cognitive Neuroscience, Biopsychology, Ruhr-University of Bochum , Bochum , Germany
| | - Felix Ströckens
- a Department of Psychology , Institute of Cognitive Neuroscience, Biopsychology, Ruhr-University of Bochum , Bochum , Germany
| | - Philipp Stavenhagen
- b Department of Psychology , Psychological Methodology and Evaluation, University of Hagen , Hagen , Germany
| | - Sebastian Ocklenburg
- a Department of Psychology , Institute of Cognitive Neuroscience, Biopsychology, Ruhr-University of Bochum , Bochum , Germany
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22
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Seth N, Simmons HA, Masood F, Graham WA, Rosene DL, Westmoreland SV, Cummings SM, Gwardjan B, Sejdic E, Hoggatt AF, Schalk DR, Abdullah HA, Sledge JB, Nesathurai S. Model of Traumatic Spinal Cord Injury for Evaluating Pharmacologic Treatments in Cynomolgus Macaques ( Macaca fasicularis). Comp Med 2018; 68:63-73. [PMID: 29460723 PMCID: PMC5824141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 07/03/2017] [Accepted: 08/14/2017] [Indexed: 06/08/2023]
Abstract
Here we present the results of experiments involving cynomolgus macaques, in which a model of traumatic spinal cord injury (TSCI) was created by using a balloon catheter inserted into the epidural space. Prior to the creation of the lesion, we inserted an EMG recording device to facilitate measurement of tail movement and muscle activity before and after TSCI. This model is unique in that the impairment is limited to the tail: the subjects do not experience limb weakness, bladder impairment, or bowel dysfunction. In addition, 4 of the 6 subjects received a combination treatment comprising thyrotropin releasing hormone, selenium, and vitamin E after induction of experimental TSCI. The subjects tolerated the implantation of the recording device and did not experience adverse effects due the medications administered. The EMG data were transformed into a metric of volitional tail moment, which appeared to be valid measure of initial impairment and subsequent natural or treatment-related recovery. The histopathologic assessment demonstrated widespread axon loss at the site of injury and areas cephalad and caudad. Histopathology revealed evidence of continuing inflammation, with macrophage activation. The EMG data did not demonstrate evidence of a statistically significant treatment effect.
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Affiliation(s)
- Nitin Seth
- School of Engineering, University of Guelph, Guelph, Ontario, Canada
| | - Heather A Simmons
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, Wisconsin
| | - Farah Masood
- School of Engineering, University of Guelph, Guelph, Ontario, Canada
| | - William A Graham
- Division of Physical Medicine and Rehabilitation, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Douglas L Rosene
- Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts
| | | | | | - Basia Gwardjan
- Division of Physical Medicine and Rehabilitation, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Ervin Sejdic
- Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Amber F Hoggatt
- Center of Comparative Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Dane R Schalk
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, Wisconsin
| | | | - John B Sledge
- Lafayette Bone and Joint Clinic, Lafayette, Louisiana
| | - Shanker Nesathurai
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, Wisconsin, Division of Physical Medicine and Rehabilitation, Department of Medicine, McMaster University, Canada, Department of Physical Medicine and Rehabilitation, Hamilton Health Sciences, St Joseph's Hamilton Healthcare, Hamilton, Ontario, Canada;,
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23
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Hopkins WD. A review of performance asymmetries in hand skill in nonhuman primates with a special emphasis on chimpanzees. PROGRESS IN BRAIN RESEARCH 2018; 238:57-89. [DOI: 10.1016/bs.pbr.2018.06.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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24
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Morino L, Uchikoshi M, Bercovitch F, Hopkins WD, Matsuzawa T. Tube task hand preference in captive hylobatids. Primates 2017; 58:403-412. [DOI: 10.1007/s10329-017-0605-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 03/08/2017] [Indexed: 11/30/2022]
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25
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Hopkins WD, Meguerditchian A, Coulon O, Misiura M, Pope S, Mareno MC, Schapiro SJ. Motor skill for tool-use is associated with asymmetries in Broca's area and the motor hand area of the precentral gyrus in chimpanzees (Pan troglodytes). Behav Brain Res 2017; 318:71-81. [PMID: 27816558 PMCID: PMC5459306 DOI: 10.1016/j.bbr.2016.10.048] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 10/27/2016] [Accepted: 10/31/2016] [Indexed: 01/16/2023]
Abstract
Among nonhuman primates, chimpanzees are well known for their sophistication and diversity of tool use in both captivity and the wild. The evolution of tool manufacture and use has been proposed as a driving mechanism for the development of increasing brain size, complex cognition and motor skills, as well as the population-level handedness observed in modern humans. Notwithstanding, our understanding of the neurological correlates of tool use in chimpanzees and other primates remains poorly understood. Here, we assessed the hand preference and performance skill of chimpanzees on a tool use task and correlated these data with measures of neuroanatomical asymmetries in the inferior frontal gyrus (IFG) and the pli-de-passage fronto-parietal moyen (PPFM). The IFG is the homolog to Broca's area in the chimpanzee brain and the PPFM is a buried gyrus that connects the pre- and post-central gyri and corresponds to the motor-hand area of the precentral gyrus. We found that chimpanzees that performed the task better with their right compared to left hand showed greater leftward asymmetries in the IFG and PPFM. This association between hand performance and PPFM asymmetry was particularly robust for right-handed individuals. Based on these findings, we propose that the evolution of tool use was associated with increased left hemisphere specialization for motor skill. We further suggest that lateralization in motor planning, rather than hand preference per se, was selected for with increasing tool manufacture and use in Hominid evolution.
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Affiliation(s)
- William D Hopkins
- Neuroscience Institute and Language Research Center, Georgia State University, Atlanta, GA 30302, United States; Division of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, 954 Gatewood Road, Atlanta, GA 30029, United States.
| | - Adrien Meguerditchian
- Laboratory of Cognitive Psychology, UMR 7290, Aix-Marseille University, CNRS, Marseille, France
| | - Olivier Coulon
- Aix-Marseille Université, LSIS, UMR CNRS 7296, Marseille, France
| | - Maria Misiura
- Neuroscience Institute and Language Research Center, Georgia State University, Atlanta, GA 30302, United States
| | - Sarah Pope
- Neuroscience Institute and Language Research Center, Georgia State University, Atlanta, GA 30302, United States
| | - Mary Catherine Mareno
- Department of Veterinary Sciences, The University of Texas MD Anderson Cancer Center, Bastrop, TX 78602, United States
| | - Steven J Schapiro
- Department of Veterinary Sciences, The University of Texas MD Anderson Cancer Center, Bastrop, TX 78602, United States
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