How does the nucleus for cranial nerve 7 receive higher cortical input?
The innervation to the muscles of facial expression can be separated into the muscles of the upper part of the face and the muscles of the lower part of the face.
The supranuclear input responsible for the movement of the upper facial musculature is a bilateral input from the cortex to the nucleus.
The supranuclear input responsible for the movement of the lower facial musculature is only a contralateral input from the cortex to the facial nucleus
