[Arteriole reactions of the submaxillary muscle to stationary and periodically repetitive displacements of its fibers and to their contraction].

Stationary local displacement of resting fibers in the frog decentralized submaxillary muscle affected by a piezoelectric device did not usually result in persistent changes of the diameter of nearby arteries. During oscillatory displacement (4 s-1) the same arterioles, exposed to microdeformation of a similar form and amplitude, dilated with a mean diameter increase averaging 36%. During contraction of submaxillary muscle (incomplete tetanus with 4 s-1) the diameter of these vessels increased by 32.69%. Comparison of the data obtained made it possible to suggest that arteriolar myocytes responded with selective relaxation only to the dynamic component of microdeformation.