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Chronic Implantation of Whole-cortical Electrocorticographic Array in the Common Marmoset

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Published on: February 1, 2019

Cortical development in brown capuchin monkeys: a structural MRI study.

Kimberley A Phillips¹, Chet C Sherwood

¹Department of Psychology, Hiram College, Hiram OH 44234, USA. phillipsk@hiram.edu

|September 23, 2008

Summary

Capuchin monkeys exhibit rapid brain development, with significant changes in brain volume and white matter from birth to five years. Males and females show distinct patterns in brain structure development, particularly in the corpus callosum.

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Area of Science:

Neuroscience
Primate Biology
Developmental Biology

Background:

Capuchin monkeys (Cebus apella) show accelerated postnatal brain growth compared to other primates.
Neonatal capuchin brain size is a smaller proportion of adult weight than most primates, similar to humans and great apes.

Purpose of the Study:

To investigate brain development patterns in brown capuchin monkeys from birth to five years.
To analyze changes in total brain volume, gray and white matter, and corpus callosum area.
To identify potential sex-based differences in capuchin brain development.

Main Methods:

Utilized high-resolution structural magnetic resonance imaging (MRI) on a cross-sectional sample of 29 brown capuchin monkeys.
Focused on quantitative analysis of total brain volume, cortical gray and white matter, frontal lobe structures, and corpus callosum area.
Examined age-related and sex-related variations in brain metrics.

Main Results:

Detected non-linear age-related changes in total brain volume, cortical white matter, and frontal white matter from birth to five years.
Identified sex differences in the corpus callosum to brain ratio, with males having a smaller ratio (10%) than females.
Observed sex differences in cortical gray and frontal lobe gray matter volumes, with males exhibiting larger volumes.

Conclusions:

Capuchin monkeys undergo rapid and significant neurological development during early life.
Distinct developmental trajectories exist between male and female capuchins, particularly concerning white matter and corpus callosum development.
These findings highlight unique aspects of primate brain maturation in Cebus monkeys.