PRIMARY MOTOR CORTEX Largest of all motor areas Lies in the precentral Gyrus –> Area 4 of Brodmann extending from medial surface to lateral sulcus. low electrical –> Specific & repeatable movement. HOMONCULUS (little man) –> Drawn by Penfield & Rasmussen 1950. Body is upside down legs most medially pharynx lateral most. SIZE OF REPRESENTATIONContinue reading “MOTOR CORTEX”