vinculum of tendons

n.
  1. Any of the fibrous bands that extend from the flexor tendons of the fingers and toes to the capsules of the interphalangeal joints and to the phalanges and convey small vessels to the tendons.synovial frenulum
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.