What is the innervation of the thenar muscles?

What is the innervation of the thenar muscles?

The majority of the thenar muscles are innervated by the median nerve (T1). The exceptions are the deep head of flexor pollicis brevis and adductor pollicis muscle that receive their innervation via the ulnar nerve (C8, T1). The main function of the thenar muscles is to produce the movements of the thumb.

What is thenar atrophy?

Thenar muscle atrophy and impaired sensibility in the distribution of the median nerve are signs of severe and prolonged median nerve compression, according to Eversmann [2]. In 1970, Phalen [16] noted that thenar atrophy is an absolute indication for surgery.

What is the Opponens Pollicis?

Opponens pollicis is a short intrinsic muscle of the hand. It belongs to a group called thenar muscles, along with adductor pollicis, abductor pollicis and flexor pollicis brevis. The main function of this muscle is the opposition of the thumb in the first carpometacarpal joint.

What is thenar space?

The thenar space is one of the three deep palmar spaces. It is rarely the site of hand infections. The fibrofatty space contains the first lumbrical muscle. ulnarly: midpalmar septum from border of palmar aponeurosis to palmar border of third metacarpal bone. radially: fascia of adductor pollicis longus muscle.

Why does my Opponens Pollicis hurt?

Most often, thenar eminence pain occurs because you’ve developed overuse syndrome from repetitive thumb movements. The pain is located in your thenar eminence because the muscles that move your thumb are there.

What causes ulnar claw?

The causes of Claw Hand might include: Nerve damage in the arm e.g ulnar palsy, median palsy, ulnar tunnel syndrome, cubital tunnel syndrome. Congenital birth defect. Some genetic diseases such as Charcot-Marie-Tooth Disease.

Does everyone have a palmaris brevis?

The palmaris longus is a muscle visible as a small tendon located between the flexor carpi radialis and the flexor carpi ulnaris, although it is not always present. It is absent in about 14 percent of the population; however, this number can vary in African, Asian, and Native American populations.

What artery supplies palmaris brevis?

Palmaris brevis

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