In his view both were part of the same map , though area 6 tended to emphasize the muscles of the back and neck .
Wilder Penfield notably disagreed and suggested that there was no functional distinction between area 4 and area 6 .
In Wilder Penfield 's view both were part of the same map , though area 6 tended to emphasize the muscles of the back and neck .
Wilder Penfield notably disagreed and suggested that there was no functional distinction between area 4 and area 6 .