roughly equal numbers of neuons responsive to mechanical loads on shoulder, elbow, and both.
neural activity is also strongly influenced by the specific motor patterns used to perform a given task.
____References____
[0] Cabel DW, Cisek P, Scott SH, Neural activity in primary motor cortex related to mechanical loads applied to the shoulder and elbow during a postural task.J Neurophysiol 86:4, 2102-8 (2001 Oct)