Table 2.

Isthmus delay

Contraction delay (ms)Relaxation delay (ms)
WormMeanRangeNMeanRangeN
143±817−67527±717−505
240±817−1171446±517−8312
  • Measurements from two worms of the delay of isthmus motions relative to corpus motions.

    Contraction delay is the delay between the first visible metacorpus contraction and the first visible anterior isthmus contraction in a pump.

    Relaxation delay is defined analogously.

    Values are means ± s.e.m.