Fig. 18.
Firing of PAS recorded in the PAn during different behaviors before and after cutting of the ipsilateral C-PL connective (n = 8). A, Recordings during head turns elicited by contact of food to the tentacles.Aa, Recording before the lesion of the C-PL connective. Strong firing of PAS occurred only with the largest turn (position 4). Ab, Recording after the lesion of the C-PL connective. Firing of PAS was not affected by the position of the head. Ac, Line drawing of the position of the head during various turns. The numberscorrespond to the numbers indicated in parts Aa andAb. B, Inhibition of PAS during head lifting (line) before (a) and after (b) cutting of the ipsilateral C-PL connective.C, Modulation of PAS activity during spontaneous buccal mass movements (backward movement indicated by broken lines) before (a) and after (b) cutting of the ipsilateral C-PL connective. D, Modulation of PAS activity during spontaneous stepping movements (neck shortening phase of step indicated by broken lines) before (a) and after (b) cutting of the ipsilateral C-PL connective.