Morphological characteristics and electrophysiological properties of CA1 pyramidal neurons in macaque monkeys

Details

Serval ID
serval:BIB_58F7A7E2CD3B
Type
Article: article from journal or magazin.
Collection
Publications
Title
Morphological characteristics and electrophysiological properties of CA1 pyramidal neurons in macaque monkeys
Journal
Neuroscience
Author(s)
Altemus K.L., Lavenex P., Ishizuka N., Amaral D.G.
ISSN
0306-4522 (Print)
1873-7544 (Electronic)
ISSN-L
0306-4522
Publication state
Published
Issued date
2005
Peer-reviewed
Oui
Volume
136
Number
3
Pages
741-756
Language
english
Notes
Publication types: Comparative Study ; In Vitro ; Journal Article ; Research Support, N.I.H., Extramural Publication Status: ppublish
Abstract
Little is known about the morphological characteristics and intrinsic electrophysiological properties of individual neurons in the nonhuman primate hippocampus. We have used intracellular recording and biocytin-labeling techniques in the in vitro hippocampal slice preparation to provide quantitative evaluation of the fundamental morphological and intrinsic electrophysiological characteristics of macaque monkey CA1 pyramidal neurons. These neurons have previously been studied in the rat in our laboratory. Monkey CA1 pyramidal neurons have an average soma volume of 3578 microm3, 4.71 basal dendrites with 53 terminal branches for a dendritic length of about 10,164 microm, 1.13 apical dendrites with 47 terminal branches for a dendritic length of about 10,678 microm. In comparison, rat CA1 pyramidal neurons have an average soma volume of 2066 microm3, 3.35 basal dendrites with 29 terminal branches for a dendritic length of about 4,586 microm, 1.43 apical dendrites with 62 terminal branches for a dendritic length of about 8,838 microm. The basic intrinsic electrophysiological properties of CA1 pyramidal cells are similar in monkeys and rats. Monkey CA1 pyramidal neurons have a resting membrane potential of about -62 mV (rat: -62 mV), an input resistance of 35 MOmega (rat: 34-49 MOmega), a rheobase of 0.17 nA (rat: 0.12-0.20 nA) and an action potential amplitude of 83 mV (rat: 71-89 mV). Although morphological differences such as the increased dendritic length may translate into differences in neural processing between primates and rodents, the functional significance of these morphological differences is not yet clear. Quantitative studies of the primate brain are critical in order to extrapolate information derived from rodent studies into better understanding of the normal and pathological function of the human hippocampus.
Keywords
Animals, Cell Size, Dendrites/metabolism, Dendrites/ultrastructure, Dose-Response Relationship, Radiation, Electric Stimulation/methods, Electrophysiology, Female, Hippocampus/cytology, Imaging, Three-Dimensional/instrumentation, Lysine/analogs & derivatives, Lysine/metabolism, Macaca/anatomy & histology, Male, Membrane Potentials/physiology, Membrane Potentials/radiation effects, Pyramidal Cells/anatomy & histology, Pyramidal Cells/physiology, Rats, Silver Staining/methods
Pubmed
Create date
13/10/2014 17:48
Last modification date
20/08/2019 14:12
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