Arteriole reactions to rhythmic displacement of the fibers of the submaxillary muscle
Sonina, R.S.; Khaiutin, V.M.
Biulleten' Eksperimental'noi Biologii i Meditsiny 102(12): 657-661
1986
ISSN/ISBN: 0365-9615 PMID: 3801612 Document Number: 282582
The fibers of acutely decentralized resting submaxillary muscle of anesthetized frogs were locally shifted by a piezoelectric device (frequency--about 4 Hz) in the direction of fiber shortening during muscular contractions. Arteriole configuration in the affected area changed and they became dilated. The maximum increase of the diameter was 16 to 126%. The latent period, the time during which peak reaction was reached, and the degree of arteriole dilatation during configuration changes were similar to those observed during 4 Hz muscle twitches. It is suggested that a mechanical factor, namely arteriole microdeformations, plays an essential role in the working hyperemia of skeletal muscles.