Then, when you've completed the movement, the flexor relaxes and the extensor contracts to extend or straighten the limb at the same joint.
Further, the number of both synapses and active zones per length terminal is significantly larger for the tonic axon in the leg extensor muscle .
To offset well-established volume/area relationships limiting muscle force, larger animals walk on extended limbs and show allometric increases in extensor muscle lever arm lengths.
A deficit in isokinetic extensor muscle torque is known to appear after rupture of the ACL, even without any surgery.
The limb is supplied with a single extensor muscle and a single flexor, all other joints are considered rigid, and the objective of the CNS is to maintain the position of the limb.
The evolution of the modern name for the special extensor muscle of the index finger is provided by Cauldwell, et al. as follows: Albinus recognized the extensor muscle and noted it in his Historia musculorum hominis.
Recent work at the leg extensor muscle showed that quantal content at tonic boutons was less than 0.05, indicating that for every 100 stimuli applied, only 5 quanta on average were released.
The triangular fibrocartilage complex is completed by the ulnar extensor muscle subsheath and the ulnar collateral ligament.
Flexion force applied against long finger (third digit) extension distal to the proximal interphalangeal joint may provoke pain over the extensor muscle mass in the proximal forearm.
The anterior compartment flexor muscles of the arm are innervated by the musculocutaneous nerve, and the large posterior compartment extensor muscle is innervated by the radial nerve.