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González Fuentes J, Cebada-Sánchez S, Arroyo-Jiménez MDM, Muñoz-López M, Rivas-Infante E, Lozano G, Mansilla F, Cortes F, Insausti R, Marcos P. Study of the human hippocampal formation: a method for histological and magnetic resonance correlation in perinatal cases. Brain Imaging Behav 2023; 17:403-413. [PMID: 37024762 PMCID: PMC10435394 DOI: 10.1007/s11682-023-00768-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2023] [Indexed: 04/08/2023]
Abstract
Little information is available on the magnetic resonance imaging (MRI) determination of the hippocampal formation (HF) during the perinatal period. However, this exploration is increasingly used, which requires defining visible HF landmarks on MRI images, validated through histological analysis. This study aims to provide a protocol to identify HF landmarks on MRI images, followed by histological validation through serial sections of the temporal lobe of the samples examined, to assess the longitudinal extent of the hippocampus during the perinatal period. We examined ex vivo MRI images from nine infant control brain samples. Histological validation of the hippocampal formation MRI images was obtained through serial sectioning and examination of Nissl-stained sections at 250 μm intervals along the entire length of the hippocampal formation. Up to six landmarks were identified both in MRI images and the serial histological sections. Proceeding in an anterior to posterior (rostrocaudal) direction, these were as follows: 1) the limen insulae (fronto-temporal junction); 2) the beginning of the amygdaloid complex; 3) the beginning of the lateral ventricle; 4) the caudal limit of the uncus, indicated by the start of the lateral geniculate nucleus (at the level of the gyrus intralimbicus); 5) the end of the lateral geniculate nucleus (beginning of the pulvinar); and 6) the beginning of the fornix. After histological validation of each of these landmarks, the full longitudinal length of the hippocampal formation and distances between landmarks were calculated. No statistically significant differences were found in total length or between landmarks. While the HF is anatomically organized at birth, its annotation is particularly challenging to perform. The histological validation of HF landmarks allows a better understanding of MRI images. The proposed protocol could be useful to assess MRI hippocampal quantification in children and possible variations due to different neurological diseases.
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Affiliation(s)
- Joaquín González Fuentes
- Centro Regional de Investigaciones Biomédicas (CRIB), Avenida de Almansa 14, 02006, Albacete, Spain.
- Department of Health Sciences, University of Castilla-La Mancha, School of Pharmacy, Albacete, Spain.
| | - Sandra Cebada-Sánchez
- Centro Regional de Investigaciones Biomédicas (CRIB), Avenida de Almansa 14, 02006, Albacete, Spain
- Human Neuroanatomy Laboratory, Department of Health Sciences, University of Castilla-La Mancha, School of Medicine, Albacete, Spain
| | - Maria Del Mar Arroyo-Jiménez
- Centro Regional de Investigaciones Biomédicas (CRIB), Avenida de Almansa 14, 02006, Albacete, Spain
- Human Neuroanatomy Laboratory, Department of Health Sciences, University of Castilla-La Mancha, School of Medicine, Albacete, Spain
| | - Mónica Muñoz-López
- Centro Regional de Investigaciones Biomédicas (CRIB), Avenida de Almansa 14, 02006, Albacete, Spain
- Human Neuroanatomy Laboratory, Department of Health Sciences, University of Castilla-La Mancha, School of Medicine, Albacete, Spain
| | - Eloy Rivas-Infante
- Servicio de Anatomía Patológica, Hospital Virgen del Rocío. Avenida Manuel Siurot, 41013, Sevilla, Spain
| | - Guillermo Lozano
- Centro Regional de Investigaciones Biomédicas (CRIB), Avenida de Almansa 14, 02006, Albacete, Spain
- Human Neuroanatomy Laboratory, Department of Health Sciences, University of Castilla-La Mancha, School of Medicine, Albacete, Spain
| | - Francisco Mansilla
- Radiology Department, University Hospital, Hermanos Falcó, 02006, Albacete, Spain
| | - Francisca Cortes
- Radiology Department, University Hospital, Hermanos Falcó, 02006, Albacete, Spain
| | - Ricardo Insausti
- Centro Regional de Investigaciones Biomédicas (CRIB), Avenida de Almansa 14, 02006, Albacete, Spain
- Human Neuroanatomy Laboratory, Department of Health Sciences, University of Castilla-La Mancha, School of Medicine, Albacete, Spain
| | - Pilar Marcos
- Centro Regional de Investigaciones Biomédicas (CRIB), Avenida de Almansa 14, 02006, Albacete, Spain
- Human Neuroanatomy Laboratory, Department of Health Sciences, University of Castilla-La Mancha, School of Medicine, Albacete, Spain
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Insausti R, Insausti AM, Muñoz López M, Medina Lorenzo I, Arroyo-Jiménez MDM, Marcos Rabal MP, de la Rosa-Prieto C, Delgado-González JC, Montón Etxeberria J, Cebada-Sánchez S, Raspeño-García JF, Iñiguez de Onzoño MM, Molina Romero FJ, Benavides-Piccione R, Tapia-González S, Wisse LEM, Ravikumar S, Wolk DA, DeFelipe J, Yushkevich P, Artacho-Pérula E. Ex vivo, in situ perfusion protocol for human brain fixation compatible with microscopy, MRI techniques, and anatomical studies. Front Neuroanat 2023; 17:1149674. [PMID: 37034833 PMCID: PMC10076536 DOI: 10.3389/fnana.2023.1149674] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Accepted: 02/28/2023] [Indexed: 04/11/2023] Open
Abstract
We present a method for human brain fixation based on simultaneous perfusion of 4% paraformaldehyde through carotids after a flush with saline. The left carotid cannula is used to perfuse the body with 10% formalin, to allow further use of the body for anatomical research or teaching. The aim of our method is to develop a vascular fixation protocol for the human brain, by adapting protocols that are commonly used in experimental animal studies. We show that a variety of histological procedures can be carried out (cyto- and myeloarchitectonics, histochemistry, immunohistochemistry, intracellular cell injection, and electron microscopy). In addition, ex vivo, ex situ high-resolution MRI (9.4T) can be obtained in the same specimens. This procedure resulted in similar morphological features to those obtained by intravascular perfusion in experimental animals, provided that the postmortem interval was under 10 h for several of the techniques used and under 4 h in the case of intracellular injections and electron microscopy. The use of intravascular fixation of the brain inside the skull provides a fixed whole human brain, perfectly fitted to the skull, with negligible deformation compared to conventional techniques. Given this characteristic of ex vivo, in situ fixation, this procedure can probably be considered the most suitable one available for ex vivo MRI scans of the brain. We describe the compatibility of the method proposed for intravascular fixation of the human brain and fixation of the donor's body for anatomical purposes. Thus, body donor programs can provide human brain tissue, while the remainder of the body can also be fixed for anatomical studies. Therefore, this method of human brain fixation through the carotid system optimizes the procurement of human brain tissue, allowing a greater understanding of human neurological diseases, while benefiting anatomy departments by making the remainder of the body available for teaching purposes.
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Affiliation(s)
- Ricardo Insausti
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Ana María Insausti
- Department of Health, School of Medicine, Public University of Navarra, Pamplona, Spain
| | - Mónica Muñoz López
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Isidro Medina Lorenzo
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Maria del Mar Arroyo-Jiménez
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - María Pilar Marcos Rabal
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Carlos de la Rosa-Prieto
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - José Carlos Delgado-González
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Javier Montón Etxeberria
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Sandra Cebada-Sánchez
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Juan Francisco Raspeño-García
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - María Mercedes Iñiguez de Onzoño
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Francisco Javier Molina Romero
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
| | - Ruth Benavides-Piccione
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, and Instituto Cajal, CSIC, Madrid, Spain
| | - Silvia Tapia-González
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, and Instituto Cajal, CSIC, Madrid, Spain
| | | | - Sadhana Ravikumar
- Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States
| | - David A. Wolk
- Department of Neurology, University of Pennsylvania, Philadelphia, PA, United States
| | - Javier DeFelipe
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, and Instituto Cajal, CSIC, Madrid, Spain
| | - Paul Yushkevich
- Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States
| | - Emilio Artacho-Pérula
- Human Neuroanatomy Laboratory, Neuromax CSIC Associated Unit, Medical Sciences Department, School of Medicine and CRIB, University of Castilla La Mancha, Albacete, Spain
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Nam-Cha SH, Ocaña AV, Pérez-Tanoira R, Aguilera-Correa JJ, Domb AJ, Ruiz-Grao MC, Cebada-Sánchez S, López-Gónzalez Á, Molina-Alarcón M, Pérez-Martínez J, Pérez-Martínez FC. Methacrylate Cationic Nanoparticles Activity against Different Gram-Positive Bacteria. Antibiotics (Basel) 2023; 12:antibiotics12030533. [PMID: 36978400 PMCID: PMC10044577 DOI: 10.3390/antibiotics12030533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 02/26/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023] Open
Abstract
Nanotechnology is a developing field that has boomed in recent years due to the multiple qualities of nanoparticles (NPs), one of which is their antimicrobial capacity. We propose that NPs anchored with 2-(dimethylamino)ethyl methacrylate (DMAEMA) have antibacterial properties and could constitute an alternative tool in this field. To this end, the antimicrobial effects of three quaternised NPs anchored with DMAEMA were studied. These NPs were later copolymerized using different methylmethacrylate (MMA) concentrations to evaluate their role in the antibacterial activity shown by NPs. Clinical strains of Staphylococcus aureus, S. epidermidis, S. lugdunensis and Enterococcus faecalis were used to assess antibacterial activity. The minimal inhibitory concentration (MIC) was determined at the different concentrations of NPs to appraise antibacterial activity. The cytotoxic effects of the NPs anchored with DMAEMA were determined in NIH3T3 mouse fibroblast cultures by MTT assays. All the employed NPs were effective against the studied bacterial strains, although increasing concentrations of the MMA added during the synthesis process diminished these effects without altering toxicity in cell cultures. To conclude, more studies with other copolymers are necessary to improve the antibacterial effects of NPs anchored with DMAEMA.
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Affiliation(s)
- Syong H. Nam-Cha
- Department of Pathology, Complejo Hospitalario Universitario, 02006 Albacete, Spain
| | - Ana V. Ocaña
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), University of Castilla-La Mancha, 02001 Albacete, Spain
| | - Ramón Pérez-Tanoira
- Clinical Microbiology Department, Hospital Universitario Príncipe de Asturias, 28805 Madrid, Spain
- Biomedicine y Biotechnology Department, School of Medicine, University of Alcalá de Henares, 28054 Madrid, Spain
| | | | - Abraham J. Domb
- Institute of Drug Research, School of Pharmacy-Faculty of Medicine, Center for Nanoscience and Nanotechnology and The Alex Grass Center for Drug Design and Synthesis, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Marta C. Ruiz-Grao
- Department of Nursing, University of Castilla-La Mancha, 02071 Albacete, Spain
- Health and Social Research Center, University of Castilla-La Mancha, 16071 Cuenca, Spain
| | | | | | - Milagros Molina-Alarcón
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), University of Castilla-La Mancha, 02001 Albacete, Spain
- Department of Nursing, University of Castilla-La Mancha, 02071 Albacete, Spain
- Correspondence: (M.M.-A.); (F.C.P.-M.)
| | - Juan Pérez-Martínez
- BIOTYC Foundation, C/Blasco de Garay 27, 02003 Albacete, Spain
- Department of Nephrology, Complejo Hospitalario Universitario, 02006 Albacete, Spain
| | - Francisco C. Pérez-Martínez
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), University of Castilla-La Mancha, 02001 Albacete, Spain
- Department of Nursing, University of Castilla-La Mancha, 02071 Albacete, Spain
- BIOTYC Foundation, C/Blasco de Garay 27, 02003 Albacete, Spain
- Correspondence: (M.M.-A.); (F.C.P.-M.)
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Marcilla-Toribio I, Moratalla-Cebrián ML, Bartolomé-Guitierrez R, Cebada-Sánchez S, Galán-Moya EM, Martínez-Andrés M. Impact of Service-Learning educational interventions on nursing students: An integrative review. Nurse Educ Today 2022; 116:105417. [PMID: 35691112 DOI: 10.1016/j.nedt.2022.105417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 04/28/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Service learning is an innovative educational approach that enables nursing students to directly participate and engage in the community while providing them and the community with benefits. OBJECTIVES To summarise the evidence from service learning activities for nursing students, the educational and non-educational benefits derived through implementing this methodology, and the participating students' perceptions. DESIGN An integrative review including qualitative, quantitative, and mixed methods designs was conducted. DATA SOURCES The articles were identified through a systematic search in the following electronic databases: PubMed, Cochrane Library Plus, Scopus, CINAHL Complete (EBSCOHost), and Education Source (EBSCOHost). REVIEW METHODS The search for studies was conducted in December 2020 using the following search terms: "Service learning", "Service-learning partnership", "Nursing", "Benefits" and "Intervention". RESULTS A total of 22 articles were included. A positive relationship was found between the nursing students participating in service learning programmes and the acquisition of educational benefits, such as theoretical and practical learning, communication skills, and teamwork, and non-educational benefits, such as empathy, questioning prejudices, and commitment. In addition, a wide variety of activities and interventions were found to have been implemented using this academic approach, as well as a positive evaluation by the participating students. CONCLUSIONS Service learning programmes with the active participation of nursing students generate benefits for both them and the community. First, these interventions receive positive evaluations from participating students. Furthermore, the interventions developed using service learning are varied and require motivation and creativity to implement them. However, there is a need for more experimental studies and the use of larger samples in service learning programmes.
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Affiliation(s)
- I Marcilla-Toribio
- Universidad de Castilla- La Mancha, Faculty of Nursing, Edificio Benjamín Palencia, Campus Universitario s/n, 02071 Albacete, Spain.
| | - M L Moratalla-Cebrián
- Universidad de Castilla- La Mancha, Faculty of Nursing, Edificio Benjamín Palencia, Campus Universitario s/n, 02071 Albacete, Spain.
| | - R Bartolomé-Guitierrez
- Universidad of Castilla-La Mancha, Department of Psychology, Edificio Benjamín Palencia, Campus Universitario s/n, 02071 Albacete, Spain.
| | - S Cebada-Sánchez
- Universidad de Castilla- La Mancha, Faculty of Nursing, Edificio Benjamín Palencia, Campus Universitario s/n, 02071 Albacete, Spain.
| | - E M Galán-Moya
- Universidad de Castilla- La Mancha, Faculty of Nursing, Edificio Benjamín Palencia, Campus Universitario s/n, 02071 Albacete, Spain.
| | - M Martínez-Andrés
- Universidad de Castilla- La Mancha, Faculty of Nursing, Edificio Benjamín Palencia, Campus Universitario s/n, 02071 Albacete, Spain.
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Delgado-González JC, de la Rosa Prieto C, Vallejo-Calcerrada N, Tarruela-Hernández DL, Cebada-Sánchez S, Insausti R, Artacho-Pérula E. Quantitative assessment of amygdala in Macaca fascicularis monkeys. J Comp Neurol 2020; 529:2091-2098. [PMID: 33247432 DOI: 10.1002/cne.25074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 10/03/2020] [Accepted: 11/09/2020] [Indexed: 11/09/2022]
Abstract
The amygdaloid complex (AC) is involved in very relevant cognitive and emotional pathways and exhibits changes in aging and in some neurological and psychiatric disorders. The quantitative estimators of AC could be useful to understand the impact of amygdaloid pathology in these processes, both globally and for each nucleus in particular, and their neurons. The present study analyzes morphometric and stereological estimators in the whole AC and its three main nuclei (lateral [La], basal [Ba], and accessory basal [AB]) in six Macaca fascicularis monkeys. All the brains were fixed and sectioned in the coronal plane; Nissl-stained sections were used for estimation of size and form parameters in both, the AC, and the La, Ba, and AB nuclei separately. The study includes stereological estimates of the volume and surface area of the AC; also, volume of the neurons in the amygdaloid nuclei was estimated using the point-sampled intercepts method. Our results show that the AB nucleus is smaller than both the La and Ba nuclei in both morphometric and stereological estimators. Brain hemispheric side had not significant influence on any of quantitative estimates. The neuron volume was higher in the AB nucleus relative to LA and Ba of the nuclei. These data describe some quantitative parameters of the amygdaloid complex and their main nuclei that could help us to detect small changes in neurodegenerative and other pathological processes.
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Affiliation(s)
| | | | | | | | | | - Ricardo Insausti
- School of Medicine, University of Castilla-La Mancha, Albacete, Spain
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6
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Delgado-González JC, de la Rosa-Prieto C, Tarruella-Hernández DL, Vallejo-Calcerrada N, Cebada-Sánchez S, Insausti R, Artacho-Pérula E. Neuronal volume of the hippocampal regions in ageing. J Anat 2020; 237:301-310. [PMID: 32314379 DOI: 10.1111/joa.13189] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 03/02/2020] [Accepted: 03/02/2020] [Indexed: 11/30/2022] Open
Abstract
The hippocampal formation (HF) has an important role in different human capacities, such as memory processing and emotional expression. Both extensive changes and limited variations of its components can cause clinically expressed dysfunctions. Although there remains no effective treatment for diseases caused by pathological changes in this brain region, detection of these changes, even minimally, could allow us to develop early interventions and establish corrective measures. This study analysed the neuronal islands of layer II of the entorhinal cortex (EC), the neuronal clumps of the external principal layer of the presubiculum (PrS) and the dentate granule cells of the dentate gyrus (DG), which represent the prominent structural regions within the HF circuit. Subjects from two age groups (younger or older than 65 years) were studied and their neuronal size assessed by the point-sampled intercepts stereological method. The quantitative v ¯ v ( s o m a ) estimate was a volume of roughly 8,500 µm3 for EC layer II neurons, and DG granule neurons and presubicular neurons were five and 10 times smaller, respectively. The older age group showed a v ¯ v ( s o m a ) increase of 2%, 18% and 28% with respect to the younger group in the PrS, DG and EC regions, respectively. None of these regions showed interhemispheric differences. This quantitative estimation is relevant because the observed variance in the v ¯ v ( s o m a ) estimates suggests that biological variation is the main contributory factor, with intercepts and measurements having a smaller impact. Therefore, we suggest that age has a limited influence on neuronal volume variation in these HF regions, which needs to be compared with similar measurements in neurodegenerative disorders such as Alzheimer's.
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Affiliation(s)
| | - Carlos de la Rosa-Prieto
- Human Neuroanatomy Laboratory, School of Medicine, University of Castilla-La Mancha, Albacete, Spain
| | | | - Nuria Vallejo-Calcerrada
- Human Neuroanatomy Laboratory, School of Medicine, University of Castilla-La Mancha, Albacete, Spain
| | | | - Ricardo Insausti
- Human Neuroanatomy Laboratory, School of Medicine, University of Castilla-La Mancha, Albacete, Spain
| | - Emilio Artacho-Pérula
- Human Neuroanatomy Laboratory, School of Medicine, University of Castilla-La Mancha, Albacete, Spain
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Cebada-Sánchez S, Marcos Rabal P, Insausti AM, Insausti R. Postnatal Development of NPY and Somatostatin-28 Peptidergic Populations in the Human Angular Bundle. Front Neuroanat 2019; 12:116. [PMID: 30687024 PMCID: PMC6338036 DOI: 10.3389/fnana.2018.00116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 12/05/2018] [Indexed: 01/05/2023] Open
Abstract
The angular bundle is a white matter fiber fascicle, which runs longitudinally along the parahippocampal gyrus. It is best known for carrying fibers from the entorhinal cortex (EC) to the hippocampus through the perforant and alvear pathways, as well as for carrying hippocampal output to the neocortex, and distributing fibers to polysensory cortex. The angular bundle is already present prenatally at the beginning of the fetal period. Connections between the EC and the hippocampus are established by the 20th gestational week (gw). In the postnatal period, it shows increasing myelination. The angular bundle, as well as other white matter portions of gyral surfaces in the brain, presents interstitial neurons, a remnant of subplate neurons. Those interstitial neurons show neurochemical phenotypes both prenatally and postnatally, among which, neuropeptide Y (NPY) and Somatostatin-28 (SOM-28) peptidergic populations are noticeable, and accompany the fiber connections in the maturation of the hippocampal formation. We sought to investigate the topography of the postnatal distribution and relative density of neurons immunoreactive for NPY or SOM in the angular bundle along the rostrocaudal axis of the hippocampus. The study was carried out in 15 cases, ranging from 35 gws, up to 14 year old. All cases showed positive neurons showing a polygonal or spindle shaped morphology for both peptides, scattered throughout the angular bundle. The highest number of positive neurons appeared around birth and the ensuing weeks. Up to one and a half years, the density of both peptidergic populations decreased slightly. However, cases older than 2 years of age showed a substantial decrease in density of immunolabeled neurons, density that did not showed a minor decrease in density of positive neurons in cases older than 2 years. In addition, a topography from caudal to rostral levels of the angular bundle was detected at all ages. The functional significance of interstitial cells is unknown, but the existence of SOM and NPY peptidergic neurons, presumably inhibitory, in the white matter of the angular bundle, could contribute to the basic wiring of the hippocampal formation, through which autobiographical and spatial memories can begin to be stored in the infant brain.
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Affiliation(s)
| | - Pilar Marcos Rabal
- Human Neuroanatomy Laboratory, University of Castilla-La Mancha, Albacete, Spain
| | - Ana María Insausti
- Human Neuroanatomy Laboratory, University of Castilla-La Mancha, Albacete, Spain
| | - Ricardo Insausti
- Human Neuroanatomy Laboratory, University of Castilla-La Mancha, Albacete, Spain
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8
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Coveñas R, González-Fuentes J, Rivas-Infante E, Lagartos-Donate M, Mangas A, Geffard M, Arroyo-Jiménez M, Cebada-Sánchez S, Insausti R, Marcos P. Developmental study of vitamin C distribution in children's brainstems by immunohistochemistry. Ann Anat 2015; 201:65-78. [DOI: 10.1016/j.aanat.2015.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 06/22/2015] [Accepted: 06/23/2015] [Indexed: 01/26/2023]
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9
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Mohedano-Moriano A, Muñoz-López M, Sanz-Arigita E, Pró-Sistiaga P, Martínez-Marcos A, Legidos-Garcia ME, Insausti AM, Cebada-Sánchez S, Arroyo-Jiménez MDM, Marcos P, Artacho-Pérula E, Insausti R. Prefrontal cortex afferents to the anterior temporal lobe in theMacaca fascicularismonkey. J Comp Neurol 2015; 523:2570-98. [DOI: 10.1002/cne.23805] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 11/30/2014] [Accepted: 04/29/2015] [Indexed: 01/22/2023]
Affiliation(s)
| | - Mónica Muñoz-López
- Department of Health Sciences; University of Castilla-La Mancha; Albacete 02006 Spain
| | - Ernesto Sanz-Arigita
- Radiology and Image Analysis Center - Free University Medical center (VUmc); Amsterdam The Netherlands
| | | | - Alino Martínez-Marcos
- Department of Health Sciences; University of Castilla-La Mancha; Ciudad Real 13071 Spain
| | | | - Ana María Insausti
- Department of Health; Physical Therapy School; Public University of Navarre; Tudela Campus 31005 Tudela Spain
| | - Sandra Cebada-Sánchez
- Department of Health Sciences; University of Castilla-La Mancha; Albacete 02006 Spain
| | | | - Pilar Marcos
- Department of Health Sciences; University of Castilla-La Mancha; Albacete 02006 Spain
| | - Emilio Artacho-Pérula
- Department of Health Sciences; University of Castilla-La Mancha; Albacete 02006 Spain
| | - Ricardo Insausti
- Department of Health Sciences; University of Castilla-La Mancha; Albacete 02006 Spain
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Cebada-Sánchez S, Insausti R, González-Fuentes J, Arroyo-Jiménez MM, Rivas-Infante E, Lagartos MJ, Martínez-Ruiz J, Lozano G, Marcos P. Distribution of peptidergic populations in the human dentate gyrus (Somatostatin [SOM-28, SOM-12] and Neuropeptide Y [NPY]) during postnatal development. Cell Tissue Res 2014; 358:25-41. [DOI: 10.1007/s00441-014-1929-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 05/15/2014] [Indexed: 01/07/2023]
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Insausti R, Cebada-Sánchez S, Marcos P. Postnatal development of the human hippocampal formation. Adv Anat Embryol Cell Biol 2010; 206:1-86. [PMID: 20329667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The postnatal development of the human hippocampal formation (HF) is subject of increasing interest due to its implication in important pathologies that hamper the normal development of children. In this work, we present a glimpse of the main events that constitute important milestones in the development and shaping of some of the most important psychological capabilities such as autobiographical memory. We analyzed a total of 21 brains ranging from 27 gestational weeks to 14 years. Although we examined some cases in the last trimester of gestation, our description starts at birth, around 40 gestational weeks. Serial sections stained with thionin for Nissl analysis revealed that all fields of the HF were present and identifiable at birth. However, the relative growth of the cortical mantle was much higher relative to the HF. The main structural changes took place during the first postnatal year, in particular in the dentate gyrus and in the entorhinal cortex. At subsequent ages, a growth in size was noted in all components of the HF. This growth was more evident at the body and tail of the hippocampus, as evidenced by measurements of the neuroanatomical series. In addition, we examined in some cases the MRI appearance of the HF at different postnatal ages obtained by postmortem imaging. MRI neuroanatomical series provided anatomically identified landmarks useful for the MRI identification of different components of the HF during postnatal development.
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Affiliation(s)
- Ricardo Insausti
- Universidad Castilla-La Mancha, CRIB, Fac. Medicina, Albacete, Spain.
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Mohedano-Moriano A, Pro-Sistiaga P, Arroyo-Jimenez MM, Artacho-Pérula E, Insausti AM, Marcos P, Cebada-Sánchez S, Martínez-Ruiz J, Muñoz M, Blaizot X, Martinez-Marcos A, Amaral DG, Insausti R. Topographical and laminar distribution of cortical input to the monkey entorhinal cortex. J Anat 2007; 211:250-60. [PMID: 17573826 PMCID: PMC2375768 DOI: 10.1111/j.1469-7580.2007.00764.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Hippocampal formation plays a prominent role in episodic memory formation and consolidation. It is likely that episodic memory representations are constructed from cortical information that is mostly funnelled through the entorhinal cortex to the hippocampus. The entorhinal cortex returns processed information to the neocortex. Retrograde tracing studies have shown that neocortical afferents to the entorhinal cortex originate almost exclusively in polymodal association cortical areas. However, the use of retrograde studies does not address the question of the laminar and topographical distribution of cortical projections within the entorhinal cortex. We examined material from 60 Macaca fascicularis monkeys in which cortical deposits of either (3)H-amino acids or biotinylated dextran-amine as anterograde tracers were made into different cortical areas (the frontal, cingulate, temporal and parietal cortices). The various cortical inputs to the entorhinal cortex present a heterogeneous topographical distribution. Some projections terminate throughout the entorhinal cortex (afferents from medial area 13 and posterior parahippocampal cortex), while others have more limited termination, with emphasis either rostrally (lateral orbitofrontal cortex, agranular insular cortex, anterior cingulate cortex, perirhinal cortex, unimodal visual association cortex), intermediate (upper bank of the superior temporal sulcus, unimodal auditory association cortex) or caudally (parietal and retrosplenial cortices). Many of these inputs overlap, particularly within the rostrolateral portion of the entorhinal cortex. Some projections were directed mainly to superficial layers (I-III) while others were heavier to deep layers (V-VI) although areas of dense projections typically spanned all layers. A primary report will provide a detailed analysis of the regional and laminar organization of these projections. Here we provide a general overview of these projections in relation to the known neuroanatomy of the entorhinal cortex.
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Affiliation(s)
- A Mohedano-Moriano
- Human Neuroanatomy Laboratory, Department of Health Sciences and CRIB, School of Medicine, University of Castilla-La Mancha, Albacete, Spain
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