Figure 2.9 | Homunculi for the Motor Cortex and the Somatosensory Cortex | These homunculi are for the left hemisphere. This means that the motor strip controls the right side of the body, and the somatosensory strip receives signals from the right side of the body. The amount of space for each body part in the motor strip is based on the complexity and precision of movement for that part, and the amount of space for each body part in the somatosensory strip is related to the part’s sensitivity. For both strips, the body is arranged from foot to head starting from the top of the hemisphere.
(Adapted from Penfield/Rasmussen, The Cerebral Cortex of Man ©1950, Gale, A part of Cengage Learning, Inc. Reproduced by permission www.cengage.com/permissions)