The claw is retracted when tension is applied to the extensor tendon above the center of rotation. This moves the claw upward and backward. When tension is applied below the center of rotation through the flexor tendon, the claw is extended. The cat’s ability to retract its claws prevents their becoming blunted by contact against the ground. To keep the front claws sharp, cats pull them against tree bark or other tough materials. The back claws are kept sharp through biting and normal use. New York Times News Service Send questions to Fixit in care of the Minneapolis Star and Tribune, 425 Portland Av. S., Minneapolis 55488. Fixit cannot supply individual replies. Fixit appears every day except Friday.
Full text: Minneapolis Star and Tribune, Jun 9, 1987
www.carpaltunnel-cure.com/