Abstract：
:Rhesus monkeys were taught to make identical wrist flexion and extension movements in response to either a visual cue or to vibratory cues. Changes in firing rates that were not stimulus-associated but preceded the movements were measured for each primary somatosensory cortical neuron recorded under the two stimulus cued conditions. The onset of the premovement activity changes and the magnitude of these changes differed when visually cued trials were compared with vibratory cued trials that resulted in the same behavioral response. In general, the magnitudes of premovement activity changes were less and the onset of these changes occurred earlier for vibratory cued trials than for the corresponding trials triggered by the visual stimulus. These findings support the hypothesis that centrally generated modulatory influences arriving at primary somatosensory cortical neurons prior to movement onset may differ, depending upon the modality of the stimulus which signals that a movement may be initiated.
journal_name
Brain Resjournal_title
Brain researchauthors
Nelson RJ,Douglas VDdoi
10.1016/0006-8993(89)90346-6subject
Has Abstractpub_date
1989-04-10 00:00:00pages
43-56issue
1-2eissn
0006-8993issn
1872-6240pii
0006-8993(89)90346-6journal_volume
484pub_type
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