withdrawal reflex

It wasn't until the early 1980s, though, that convincing evidence for classical conditioning of the gill and siphon withdrawal reflexes could be obtained.

This is not the time for minor last-minute arrangements, sudden nationalistic reactions, or withdrawal reflexes that are in danger of making this Treaty lose all its coherence, by introducing lots of accommodating opt-outs.

Electroencephalography suggests the capacity for functional pain perception in premature infants probably does not exist before 29 or 30 weeks; this study asserted that withdrawal reflexes and changes in heart rates and hormone levels in response to invasive procedures are reflexes that do not indicate fetal pain.