7 Strength of abductor pollicis brevis
+ 2 0 0 3 1.
Thus, carpal tunnel syndrome (CTS) is the entrapment neuropathy of the median nerve that causes paresthesia, pain, numbness, and weakness of the flexor pollicis brevis, opponens pollicis, and abductor pollicis brevis
in the innervation area of the median nerve because of its compression in the wrist (1).
Physical examination revealed proximal muscle weakness of the upper and lower limbs (muscle test 3/5), and weakness of the distal muscles of both hands, in the abductor pollicis brevis
, opponens pollicis, flexor pollicis and the first and second lumbricals particularly.
Median study, recording abductor pollicis brevis
and stimulating wrist and antecubital fossa
The atrophy and the weakness of the abductor pollicis brevis
and interosseous muscles had also increased.
right, ms: millisecond, mV: millivolt, m/s: meter/second, APB: abductor pollicis brevis
, ADM: abductor digiti minimi, EDB: extensor digitorum brevis, AH: abductor hallucis Table 1b.
11) Insertion of the tendon into abductor pollicis brevis
was observed by Valeria et al in 2007.
Bilateral median motor nerve conduction studies on the wrist-elbow segment recording from the abductor pollicis brevis
(APB) muscle, and bilateral ulnar motor nerve conduction studies on the wrist-elbow, across elbow, elbow-axilla and the axilla-erb segments recording from the abductor digiti minimi (ADM) muscle were done using superficial electrodes.
The tendon of this belly is divided in to 6 slips and these slips are attached to one slip to abductor pollicis Brevis
, 2 slips to the anterolateral aspects of the base of first metacarpal, one slip to Trapezium, one slip to base of proximal phalanx of thumb and one slip to dorsal digital expansion of thumb.
2ms) (9,10); 4) no spontaneous activity or markedly reduced firing frequency from the abductor pollicis brevis
(APB) muscle by electromyographic examination.
52 NCS: Nerve Conduction Study, APB: Abductor Pollicis Brevis
, ADM: Abductor Digiti Minimi, EDB: Extensor Digitorum Brevis, FHB: Flexor Hallucis Brevis