Fig. 6.
B38 is most active in normal swallowing in vivo compared with other behaviors. All recordings shown are from the same animal. Note that the timing of RN activity relative to I2 protraction activity indicates the ingestive nature of the first 3 behaviors and the egestive nature of the 4th behavior. A: a biting pattern. B38 activity (gray box) is sparse, ending early in the protraction phase (protraction phase is indicated by the large burst of I2 activity). B: a normal swallowing pattern. B38 activity is very intense, continuing through the protraction phase. Note the large overlap between B38 activity and I2 activity. C: a visible radula swallow. B38 is more active than in the bite but less than in the normal swallow. B38 activity partially overlaps the I2 activity. D: a rejection pattern. B38 is not active.