thenar muscles


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Related to thenar muscles: Hypothenar muscles

thenar muscles

Anatomy The intrinsic muscles of the thumb: adductor pollicis brevis, adductor pollicis brevis, flexor pollicis brevis, opponens pollicis See Hand, Thumb. Cf Hypothenar muscles.
References in periodicals archive ?
[23,24] It has been shown that motor fibers innervating the thenar muscles are relatively protected, compared to motor branches of the lumbrical muscles.
Recovery in thenar muscle function was good, fair and poor in 5, 2 and 10 cases after median nerve repair, while all 12 patients with ulnar nerve lesion showed some degrees of clawing of 4th and 5th fingers.
This would manifest with muscle atrophy in the thenar muscles and/or difficulty approximating the tip of the thumb with the opposing fingertips (Figure 3).
Intraoperatively, an incision was made over the dorsal aspect of the thumb metacarpophalangeal (MCP) joint, coursed along the radial insertion of the thenar muscles, curving ulnarly along the distal wrist crease, and extending longitudinally over the flexor carpi radialis (FCR) and palmaris longus (PL) tendon.
In this technique, recording was performed in the middle point of the thenar muscles via a superficial electrode, and a stimulus was applied from 10 cm proximal and from the middle of the fore arm.
The superficial palmar branch passes through the thenar muscles and anastomoses with the superficial branch of the ulnar artery forming the superficial palmar arterial arch.
Prolongation of distal median motor and sensory latencies with abnormal EMG of median innervated thenar muscles only proved it to be a case of bilateral CTS.
Responses of thenar muscles to transcranial magnetic stimulation of the motor cortex in patients with incomplete spinal cord injury.