Figure 14.

Receptive fields of neurons in penetrations through area 3b in the region where in addition to receptive fields on the chin we encountered neurons with responses to touch on the hand, arm, or occiput. The receptive fields of neurons in each penetration at the sites marked by letters are shown on the adjacent figurines. Note that the receptive fields on the arm were confined to the anterior upper arm. Only at one site (site “A” in penetration 7) did neurons respond to touch on the hand (digit 5). The locations of the electrode penetrations are shown on the inset on the bottom right (compare Fig. 12 A).