Figure 4.

Ocular dominance and orientation selectivity of the transcallosally activated units recorded in visual cortex of strabismic (CV₁ and CV₂) and normal (NR) cats. (A) Ocular dominance of transcallosal units recorded in A17, 17/18 TZ, A18, and the white matter (WM). Units were ranked into four classes according to the relative strength of response to contralateral (c) and ipsilateral (i) eye stimulation: c, units activated only through the stimulation of the contralateral eye; c > i, units activated preferentially through the contralateral eye; c = i, units activated equally through both eyes; i > c, units activated preferentially through the ipsilateral eye. Global, all units pulled together. n, number of units. (B) Orientation selectivity of transcallosal units recorded in A17, 17/18 TZ, A18, and WM. Orientation selective (S) and non-orientation selective (NS) units were distinguished. Global, all units pulled together, whatever their cortical location. n, number of units. Data from the CV₁ and the NR group have been reproduced with permission from Milleret and Houzel (2001).