In physiology, the slow-wave threshold is the potential which must be reached before a slow wave can be propagated in smooth muscle. Slow waves cause no smooth muscle contraction.
A depiction of a slow wave, contraction and electrical threshold in relation to smooth muscle tone and resting membrane potential
Gastrointestinal smooth muscle
In gastrointestinal smooth muscle, the slow-wave threshold can be altered by input from endogenous and exogenous innervation, as well as excitatory (acetylcholine and Substance P) and inhibitory (vasoactive intestinal peptide and nitric oxide) compounds.
- ^ Pathophysiology. Porth. 7th Ed. pg.875–878