Muscles of the Hand

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Undergraduate Phase 1 MBChB Karteikarten am Muscles of the Hand, erstellt von Melissa Denker am 19/04/2015.
Melissa Denker
Karteikarten von Melissa Denker, aktualisiert more than 1 year ago
Melissa Denker
Erstellt von Melissa Denker vor mehr als 9 Jahre
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Intrinsic hand muscles (11) Functions (3) Palmaris brevis m. Dorsal interosseous mm. Palmar interosseous mm. Lumbrical mm. Adductor pollicis m. Opponens pollicis m. Flexor pollicis brevis m. Abductor pollicis brevis m. Flexor digiti minimi brevis m. Adductor digiti minimi m. Opponens digiti minimi m. Functions: flexion, abduction, adduction
Palmaris brevis m. Origin? Innervation? (nerve + branch) Function? (1) Origin: palmar aponeurosis, flexor retinaculum --> dermis of skin on medial aspect of hand Innervation: ulnar nerve (superficial branch) Function: improves grip
Dorsal interosseous mm. (3) Origin? Innervation? (nerve + branch) Function? (1) Origin: adjacent sides of metacarpals --> extensor hoods and bases of proximal phalanges of index/middle/ring fingers Innervation: ulnar nerve (deep branch) Function: abduction of fingers at metacarpophalangeal joints
Palmar interosseous mm. Origin? Innervation? (nerve + branch) Function? (1) Origin: sides of metacarpals --> extensor hoods of thumb/index/ring/little fingers, proximal phalanx of thumb Innervation: ulnar nerve (deep branch) Function: adduction of fingers at metacarpophalangeal joints
Adductor pollicis m. Origin? (2) Innervation? Function? (1) Origin: TRANSVERSE HEAD: metacarpal 3 --> extensor hood and proximal phalanx of thumb OBLIQUE HEAD: capitate, bases of metacarpals 2 and 3 --> extensor hood and proximal phalanx of thumb Innervation: ulnar nerve (deep branch) Function: Adduction of thumb
Lumbrical mm. (4) Origin? Innervation? (2) Function? (1) Origin: tendons of flexor digitorum profundus m. --> extensor hoods of index/middle/ring/little fingers Innervation: MEDIAL 2 MUSCLES: ulnar nerve (deep branch) LATERAL 2 MUSCLES: median nerve (digital branch) Function: flexion of metacarpophalangeal joints PLUS extension of interphalangel joints
Thenar muscles (3) Opponens pollicis m. Abductor pollicis brevis m. Flexor pollicis brevis m.
Opponens pollicis m. Origin? Innervation? Function? Origin: trapezium, flexor retinaculum --> metacarpal 1 Innervation: median nerve (recurrent branch) Function: medial rotation of thumb
Abductor pollicis brevis m. Origin? Innervation? Function? (1) Origin: scaphoid, trapezium, flexor retinaculum --> proximal phalanx and extensor hood of thumb Innervation: median nerve (reccurent branch) Function: abduction of thumb
Flexor pollicis brevis m. Origin? Innervation? Function? (1) Origin: trapezium, flexor retinaculum --> proximal phalanx of thumb Innervation: median nerve (recurrent branch) Function: flexion of thumb at metacarpophalangeal joint
Hypothenar muscles (3) Opponens digiti minimi m. Adductor digiti minimi m. Flexor digiti minimi brevis m.
Opponens digiti minimi m. Origin? Innervation? Function? (1) Origin: hamulus, flexor retinaculum --> medial aspect of metacarpal 5 Innervation: ulnar nerve (deep branch) Function: lateral rotation of metacarpal 5
Abductor digiti minimi m. Origin? Innervation? Function? (1) Origin: pisiform, pisohamate ligament, flexor carpi ulnaris tendon --> proximal phalanx of little finger Innervation: ulnar nerve (deep branch) Function: abduction of little finger
Flexor digiti minimi brevis m. Origin? Innervation? Function? (1) Origin: hamulus, flexor retinaculum --> proximal phalanx of little finger Innervation: ulnar nerve (deep branch) Function: flexion of little finger
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