Finger joint muscles Flashcards
Flexion at MP joints:
- lumbricals
- interossesi
flexion at MP of little finger:
-flexor digit minimi
flexion at PIP joints:
- flexor digitorum superficialis
- lumbricals
flexion at DIP joints:
-flexor digitorum profundus
extension at MP joints of all fingers
-extensor digitorum
extension of index finger:
-extensor indicis
extension of little finger:
-extensor digiti minimi
Extension at IP joints:
- lumbricals
- intersossei
aBduction at MP joints:
- dorsal interossei
- aBductor digiti minimi
aDDuction at MP joints of all fingers except the middle:
-palmar interossei
opposition of little finger:
-opponens digiti minimi
flexion at all joints of the thumb:
-flexor pollicis longus
flexion at MP joint of thumb:
-flexor pollicis brevis
extension at all joints of the thumb:
-extensor pollicis longus
extension at MP joint of thumb:
-extensor pollicis brevis
aBduction of thumb:
- aBductor pollicis longus
- aBductor pollicis brevis
aDDuction of thumb:
-aDDuctor pollicis
opposition of thumb:
-opponens pollicis
lumbrical innervation
- median nerve: index and middle fingers (C8, T1)
- ulnar nerve (deep branch): ring and little (C8. T1)
interossei innervation:
-ulnar nerve deep branch (C8, T1)
flexor digitorum superficialis innervation:
-median nerve (C7, 8, T1)
flexor digitorum profundus innervation:
- Median (anterior interosseous nerve) to index and middle finger
- Ulnar (deep branch) to ring and little
both are C8
extensor digitorum innervation:
-radial (deep branch) C6, 7, 8
extensor indicis innervation:
-radial (deep branch) C7,8
