thenar muscle


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Related to thenar muscle: Hypothenar muscle

thenar muscle

The abductor or flexor muscle of the thumb.
See also: muscle
References in periodicals archive ?
Physical examination showed that he had thenar muscles and distal lower limbs atrophy, foot dorsiflexion weakness (scored 1/5 on Medical Research Council [MRC]), reduced vibration sense, absent tendon reflexes, pes cavus, and strephenopodia.
7] suggest that as motor fibers of median nerve to thenar muscles course more superficially and anteriorly than lumbrical motor fibers inside the carpal tunnel, they are more likely to be affected from the compression under the flexor retinaculum.
With more complex deformities, a varying decrease in thenar muscle mass and first webspace contracture can be appreciated.
Table 1 Overview of the rehabilitative exercises prescribed in this case EXERCISE INSTRUCTIONS * Thenar muscle group * 15-20 second holds, 8-10 reps stretches (Figure 1) for each respective stretch, * Forearm extensor/ 5 x/wk.
The numbness usually begins in the thick muscle just below the thumb, termed the thenar muscle, affecting primarily the dominant hand.
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.
The hand of each patient was placed in the supine position and a 25 mm length light probe was placed on the skin over the thenar muscle via a single-use patch.
Loss of control of the thenar muscles situated in the palm of the hand between thumb and index finger is generally one of the first signs of ALS.
For example, cortical motor-evoked potential facilitation has been reported following short duration (5 s), submaximal intensity contractions (50%) of the thenar muscles (Balbi et al.
Recordings were made simultaneously with four channels: C3' - Fz, Cz' - Fz, C4' - Fz, and the thenar muscles at rest.