Rats made hypothyroid by surgical thyroidectomy were compared with controls relative to the shortening velocity and maximum shortening ability of the intestinal smooth muscle and the gastrocnemius. Hypothyroidism showed some potentiation of maximum shortening, but no effect on the shortening velocity of the gastrocnemius. Intestinal smooth muscle maximum shortening as well as shortening velocity tend to be depressed. There is some evidence for a differential effect of thyroid hormone lack in the two muscle types.
Proceedings of the Iowa Academy of Science
©1967 Iowa Academy of Science, Inc.
Rulon, Russell R.
"Effect of Thyroidectomy on the Mechanics of Skeletal and Intestinal Smooth Muscle,"
Proceedings of the Iowa Academy of Science, 74(1), 210-213.
Available at: https://scholarworks.uni.edu/pias/vol74/iss1/33