Superficial muscular aponeurotic system

Superficial muscular aponeurotic system (or superficial musculoaponeurotic system) (SMAS) is a thin yet tough unitary tissue plane of the face formed by facial fasciae, subcutaneous connective tissue, and facial muscles. Its composition varies, containing muscle fibres in some areas, and fibrous or fibroaponeurotic tissue in others.

This neuron ends here.