Reorganization in the macaque interoceptive-allostatic network following anterior cingulate cortex damage

Author:

Charbonneau Joey A12ORCID,Bennett Jeffrey L234ORCID,Chau Kevin2,Bliss-Moreau Eliza25ORCID

Affiliation:

1. Neuroscience Graduate Program, University of California Davis , 1544 Newton Court, Davis, CA 95618 , United States

2. California National Primate Research Center, University of California Davis , One Shields Avenue, Davis, CA 95616 , United States

3. Department of Psychiatry and Behavioral Sciences, University of California Davis School of Medicine , 2230 Stockton Blvd, Sacramento, CA 95817 , United States

4. The MIND Institute, University of California Davis , 2825 50th Street, Sacramento, CA 95817 , United States

5. Department of Psychology, University of California Davis , 135 Young Hall One Shields Avenue, Davis, CA 95616 , United States

Abstract

Abstract Accumulating evidence indicates that the adult brain is capable of significant structural change following damage—a capacity once thought to be largely limited to developing brains. To date, most existing research on adult plasticity has focused on how exteroceptive sensorimotor networks compensate for damage to preserve function. Interoceptive networks—those that represent and process sensory information about the body’s internal state—are now recognized to be critical for a wide range of physiological and psychological functions from basic energy regulation to maintaining a sense of self, but the extent to which these networks remain plastic in adulthood has not been established. In this report, we used detailed histological analyses to pinpoint precise changes to gray matter volume in the interoceptive-allostatic network in adult rhesus monkeys (Macaca mulatta) who received neurotoxic lesions of the anterior cingulate cortex (ACC) and neurologically intact control monkeys. Relative to controls, monkeys with ACC lesions had significant and selective unilateral expansion of the ventral anterior insula and significant relative bilateral expansion of the lateral nucleus of the amygdala. This work demonstrates the capacity for neuroplasticity in the interoceptive-allostatic network which, given that changes included expansion rather than atrophy, is likely to represent an adaptive response following damage.

Funder

National Institutes of Health

Publisher

Oxford University Press (OUP)

Subject

Cellular and Molecular Neuroscience,Cognitive Neuroscience

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