Hand Muscles Flashcards
Muscles inserting on distal phalanges 2-5
flexor digitorum profundus
Muscles inserting on middle phalanges 2-5
flexor digitorum superficialis
Muscle inserting on distal phalanx of the thumb
flexor pollicis longus
Muscles inserting on pisiform, hamate and 5th metacarple
flexor carpi ulnaris
innervated by ulnar nerve
Superficial structures of the palm
hypothenar eminence (pinky)
- AFO
thenar eminance (thumb)
- AFO
Tendon of palmaris longus
Palmar apneurosis
intermediate structures of the palm
Long Flexor Tendonds
- flexor digitorum superficialis
- flexor digitorum profundus
Lumbrical Muscles
Long flexor tendons travel
UNDER flexor retinaculum
Flexor digitorum superficialis and profundus attach
superficialis - middle metacarpals
profundus - distal metacarpals 2-5
Deep structures of the palm
Interosseus muscles
Palmar interossei - adduction
Dorsal interossei - abduction of fingers
Superficial branch ulnar nerve with respect to ‘flexor retinaculum’
OVER
Palmaris Brevis
- Above hypothenar AFO
- attached to palmer apneurosis and inserts on hypotenar skin
**only muscle innervated by the superficial branch of the ulnar nerve
Hypothenar eminence muscles
AFO
“ab”ductor digiti minimi (outside)
flexor digiti minimi (middle)
oppenens digit minimi (deep to)
Thenar eminence muscles
AFO
“ab”ductor pollicis brevis
flexor pollicis brevis
oppenenes pollicis brevis
Thenar eminence origin
- flexor retinaculum
- scaphoid and trapezium bone
Thenar eminence insertion
A - proximal phalanx of thumb
F - proximal phalanx of thumb
O - 1st metacarpal
Thenar eminence innervation
recurrent median nerve
Actions of thenar and hypothenar muscles
A - Abduction
F - Flexion
O - Opposition
(of thumb and 5th digit)
Opposition movement definition
bringing the thumb and pinky finger together
Hypothenar Eminence origins
A
- pisiform bone
F and O
- flexor retinaculum and hamate bone
Hypothenar Eminence insertions
A and F
- Proximal phalanx of digit 5
O
- 5th metacarpal
Hypothenar eminence innervation
deep branch of ulnar nerve
Adductor pollicis origin
oblique head:
- bases of 2nd and 3rd metacarpal
- capitate
transverse head:
- 3rd metacarpal
Adductor pollicis insertion
proximal phalanx of thumb - medial side
Addcutor pollicis innervation
deep branch of ulnar nerve
adductor pollicis action
adduction of thumb
Lumbercals origin
tendons of flexor digitorum profundus
muscles originating from tendons of flexor digitorum profundus?
lumbercals
Lumbercals insertion
extensor expansions
Lumbercals innervation
lateral 2:
median nerve
medial 2:
deep branch of ulnar nerve
Lumbercals action
flexion of digits at MCP joints
extension of digits at IP joints
interossei origin
metacarpal bones
interossei insertion
extensor expansions
bases of proximal phalanges
interossei innervation
deep branch ulnar nerve
dorsal interossei (1-4) action
ABduction of digits from axial line
flexion of digits at MCP joint
extension of digits at IP joints
palmer interossei (1-3) action
ADduction of digits from axial line
flexion of digits at MCP joint
extension of digits at IP joints
muscles that cause:
flexion of digits at MCP joint
extension of digits at IP joints
lumbercals interossei (dorsal and palmer)
Muscles of hand innervated by ‘median nerve’
Lateral 2 Lumbercals
Thenar Eminence Muscles - AFO
- reccurent median nerve
