HTHSCI 2F03 Lecture Notes - Lecture 7: Anterior Interosseous Nerve, Nerve Conduction Study, Pronator Teres Muscle
26 Dec 2020
School
Department
Course
Professor
Document Summary
Carpal tunnel formed by flexor retinaculum and carpal bones. Median n. supplies lloaf (abductor pollicis brevis) Palmer cutaneous branch travels superficial to flexor retinaculum spares sensation over thenar area. Tingling / pain in thumb, index and middle fingers. Pain worse @ night or after repetitive actions. Carpal tunnel decompression by division of the flexor retinaculum. Scar formation: high risk for hypertrophic or keloid. Palmar cutaneous branch of the median nerve. Entrapment between two heads of pronator teres. Compression of the anterior interosseous branch by the deep head of pronator teres. Tendon nodule which catches on proximal side of tendon sheath triggering on forced extension. Rx: steroid injection (high recurrence) or surgery. Mucoid degeneration of joint capsule or tendon sheath. May be in communication c joint capsules / tendons. May cause pain or nerve pressure symptoms. Progressive, painless fibrotic thickening of palmar fascia. Fixed flexion contracture of ring and little fingers. E. g. when hand can"t be placed flat on the table.
