Abstract：
:Field potentials preceding vocalization were recorded with electrodes chronically implanted on the surface and at 2.0-3.0 mm depth in various cortical areas in three monkeys. Surface-negative, depth-positive (s-N, d-P) slow potentials prior to vocalization were recorded in the premotor (including the Broca's homology), motor and somatosensory cortices in both hemispheres, and the supplementary motor area in the cerebral hemisphere. Such premovement potentials were recorded also in the cingulate and prefrontal cortices when a monkey uttered with intense motivation for reward. Cerebellar hemispherectomy on the right side eliminated the s-N, d-P premovement potentials in the motor cortex and in the posterior bank of inferior limb of the arcuate sulcus (homolog of Broca's area) in the left hemisphere. Vocal tone contained less components in different frequencies, and its duration became more variable than before the operation. These facts suggest that the neocortical area homologous to the human speech area takes part in generation and control of monkey vocalization together with the cerebellum, possibly through cerebro-cerebellar interactions, against ideas so far offered on nonhuman primate vocalization.
journal_name
Brain Resjournal_title
Brain researchauthors
Gemba H,Miki N,Sasaki Kdoi
10.1016/0006-8993(95)00797-tsubject
Has Abstractpub_date
1995-10-30 00:00:00pages
143-51issue
1-2eissn
0006-8993issn
1872-6240pii
0006-8993(95)00797-Tjournal_volume
697pub_type
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