the afferent and efferent connections of the dorsolateral precentral gyrus , the primary motor cortex for control of the upper extremity , were studied by using the retrograde and anterograde capabilities of the horseradish peroxidase ( hrp ) technique in three adult macaque monkeys that had received hrp gel implants in this cortical region .
C0152299
precentral gyrus
C3495441
primary motor cortex