thenar


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Related to thenar: hypothenar, thenar space

thenar

[′thē‚när]
(anatomy)
The ball of the thumb.
References in periodicals archive ?
Anastomosis between the deep branch of ulnar nerve and a branch of the median nerve (Cannieu-Riche anastomosis) and thenar muscles innervation.
Unilateral Type of Macrodystrophia Lipomatosa of the Thumb, Index Finger, and Thenar. Balkan Med J 2019;36:60-1
The defects were repaired with V-Y advancement flaps in 57% (45 patients - 51 fingers), kite flap in 15% (13 patients - 13 fingers), cross-finger flap in 12% (11 patients - 11 fingers), Kutler flap in 6% (4 patients - 5 fingers), digital artery perforator flap in 6% (4 patients - 5 fingers), and thenar flap in 4% (4 patients - 4 fingers) of the injuries [Figure 3].
On clinical examination, there was a single swelling located over the thenar crease (Figure 1A).
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.
Electrodes are placed on either two digits or the thenar and hypothenar eminences of the palm.
The use of improper gloves results in excessive tension on thenar eminence.
Our case is unique due to the multiple extraspinal manifestations identified in a single patient, including Sprengel deformity and significant left upper extremity deformities such as proximal radioulnar synostosis and a four-rayed hand without thenar musculature.
Patients with pathogenic variants in the GARS gene have typically presented with progressive bilateral weakness, vibratory sense impairment in extremities, and hand muscles atrophy, specifically the thenar and first dorsal interosseus muscles with relative sparing of the hypothenar eminence.
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.
Similarly, both hands were malformed, laterally rotated, abducted, and parallel to the upper arm with bilateral absence of thenar fold (figure 1A).