Symmetrical movements of paired facial structures,such as the lips,are made possible by the:
A)communication between hemispheres made possible by the corpus callosum
B)contralateral innervation of the lower motor neurons by upper motor neurons
C)same mechanisms that allow for coordinated movement of the hands
D)bilateral innervation of the lower motor neurons by upper motor neurons

Question

Quizplus · Accepted Answer

The bilateral upper motor neuron innervation of many of the paired facial muscles accounts for the symmetrical movement of these structures.

Symmetrical Movements of Paired Facial Structures,such as the Lips,are Made