Table 2.

Effects of proctolin, glutamic acid and tetanic electrical stimulation on force development by arterial rings and orbicularis ostii muscle

TissueInitial*PRNInitial*GLUNInitial*Electrical stimulationN
ALA0.502±0.0470.055±0.010 (10.9%)120.693±0.1680.011±0.004 (1.5%)203
HA0.201±0.0700.010±0.015 (5.1%)50.1730.165103
SA0.681±0.3320.136±0.163 (19.9%)120.613±0.1060.060±0.038 (9.7%)505
DAA1.588±1.2470.888±0.094 (5.7%)61.351±0.8920.205±0.225 (15.2%)82.073±0.4930.040±0.007 (1.9%)7
OOM0.585±0.1960.388±0.200 (66.3%)50.6790.112 (16.4%)10.226±0.1270.980±0.418 (433.6%)3
  • ALA, anterior lateral artery; HA, hepatic artery; SA, sternal artery; DAA, dorsal abdominal artery; OOM, orbicularis ostii muscle; PR, proctolin; GLU, glutamic acid

  • * The force (in mN) at the time of drug administration or electrical stimulation. Values in the adjacent columns to the right are the incremental responses to a particular stimulus; percentage change from initial value shown in parantheses. All force values (mean ± s.e.m.) are expressed in mN