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  • Title: Contrasting properties of neurons in two parts of the primary motor cortex of the awake rat.
    Author: Donoghue JP.
    Journal: Brain Res; 1985 Apr 29; 333(1):173-7. PubMed ID: 3995285.
    Abstract:
    Features of neuronal activity in two subdivisions of primary motor cortex (MI) were recorded in awake rats. Neurons in the caudal part of MI, which overlaps part of the somatic sensory cortex, discharge with brief bursts in conjunction with isometric bar pressing with the forelimb. Cells in this caudal region are activated by cutaneous stimuli. In the rostral part of MI, neurons discharge prior to and during forelimb force changes, begin to discharge earlier than in the caudal zone, and have non-cutaneous or unidentifiable receptive fields. These results suggest separate motor control functions for rostral and caudal parts of rat MI.
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