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González-Marrero I, Hernandez-Garcia JA, Gonzalez-Davila E, Carmona-Calero EM, Gonzalez-Toledo JM, Catañeyra-Ruiz L, Henandez-Abad LG, Castañeyra-Perdomo A. Variations of the grid and place cells in the entorhinal cortex and dentate gyrus of 6 individuals aged 56 to 87 years. Neurologia 2024; 39:244-253. [PMID: 37442425 DOI: 10.1016/j.nrleng.2023.07.007] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 04/27/2021] [Indexed: 07/15/2023] Open
Abstract
INTRODUCTION The relationship between the entorhinal cortex (EC) and the hippocampus has been studied by different authors, who have highlighted the importance of grid cells, place cells, and the trisynaptic circuit in the processes that they regulate: the persistence of spatial, explicit, and recent memory and their possible impairment with ageing. OBJECTIVE We aimed to determine whether older age causes changes in the size and number of grid cells contained in layer III of the EC and in the granular layer of the dentate gyrus (DG) of the hippocampus. METHODS We conducted post-mortem studies of the brains of 6 individuals aged 56-87 years. The brain sections containing the DG and the adjacent EC were stained according to the Klüver-Barrera method, then the ImageJ software was used to measure the individual neuronal area, the total neuronal area, and the number of neurons contained in rectangular areas in layer III of the EC and layer II of the DG. Statistical analysis was subsequently performed. RESULTS We observed an age-related reduction in the cell population of the external pyramidal layer of the EC, and in the number of neurons in the granular layer of the DG. CONCLUSION Our results indicate that ageing causes a decrease in the size and density of grid cells of the EC and place cells of the DG.
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Affiliation(s)
- I González-Marrero
- Unidad de Anatomía y Embriología Humana, Departamento de Ciencias Médicas Básicas, Facultad de Ciencias de la Salud, Universidad de La Laguna, Tenerife, Islas Canarias, Spain
| | - J A Hernandez-Garcia
- Unidad de Anatomía y Embriología Humana, Departamento de Ciencias Médicas Básicas, Facultad de Ciencias de la Salud, Universidad de La Laguna, Tenerife, Islas Canarias, Spain
| | - E Gonzalez-Davila
- Departamento de Matemáticas, Estadística e Investigación Operativa, Universidad de La Laguna, Tenerife, Islas Canarias, Spain
| | - E M Carmona-Calero
- Unidad de Anatomía y Embriología Humana, Departamento de Ciencias Médicas Básicas, Facultad de Ciencias de la Salud, Universidad de La Laguna, Tenerife, Islas Canarias, Spain; Instituto de Investigación y Ciencias, Puerto del Rosario, Fuerteventura, Islas Canarias, Spain
| | - J M Gonzalez-Toledo
- Unidad de Anatomía y Embriología Humana, Departamento de Ciencias Médicas Básicas, Facultad de Ciencias de la Salud, Universidad de La Laguna, Tenerife, Islas Canarias, Spain
| | - L Catañeyra-Ruiz
- Department of Neurological Surgery, Washington University School of Medicine and the St. Louis Children's Hospital, St. Louis, Missouri, United States
| | - L G Henandez-Abad
- Unidad de Anatomía y Embriología Humana, Departamento de Ciencias Médicas Básicas, Facultad de Ciencias de la Salud, Universidad de La Laguna, Tenerife, Islas Canarias, Spain; Instituto de Investigación y Ciencias, Puerto del Rosario, Fuerteventura, Islas Canarias, Spain
| | - A Castañeyra-Perdomo
- Unidad de Anatomía y Embriología Humana, Departamento de Ciencias Médicas Básicas, Facultad de Ciencias de la Salud, Universidad de La Laguna, Tenerife, Islas Canarias, Spain; Instituto de Investigación y Ciencias, Puerto del Rosario, Fuerteventura, Islas Canarias, Spain.
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