Test 2 Anterior Forearm Muscles Flashcards
Pronator teres (PT) proximal attachment, origin
ulnar head:coronoid process of ulna
humeral head: medial epicondyle of the humerus
superficial (first) layer
anterior compartment of forearm
- Pronator teres (PT)
- flexor carpi radialis (FCR)
- palmaris longus
- flexor carpi ulnaris (FCU)
Pronator teres (PT) distal attachment, insertion
Middle of convexity of lateral surface of radius
pronator teres (PT) innervation
median nerve
C6 C7
pronator Teres (PT) action
pronates and flexes forearm(at elbow)
flexor carpi radialis (FCR) proximal attachment, origin
medial epicondyle of humerus
flexor carpi radialis (FCR) distal attachment insertion
base of 2nd (&3rd) metacarpal
flexor carpi radialis (FCR) innervation
median nerve
C6 C7
flexor carpi radialis (FCR) action
flexes and abducts hand (at wrist)
palmaris longus proximal attachment, origin
medial epicondyle of humerus
palmaris longus distal attachment insertion
- distal 1/2 of flexor retinaculum
- palmar aponeurosis
palmaris longus innervation
median nerve
C7 C8
palmaris longus action
flexes hand (at wrist) and tenses palmar aponeurosis
flexor carpi ulnaris (FCU) proximal attachment origin
olecranon and posterior border (via aponeurosis)
flexor carpi ulnaris (FCU) distal attachment insertion
- pisiform
- hook of the hammate
- 5th metacarpel
flexor carpi ulnaris (FCU) innervation
ulnar nerve C7 C8
flexor carpi ulnaris (FCU):(humeral head, ulnar head) action
flexes and adducts hand (at wrist)
intermediate (second) layer
anterior compartment of forearm
-flexor digitorum superficialis (FDS)
flexor digitorum superficialis (FDS) proximal attachment, origin
humero-ulnar head: medial epicondyle of humerus and corocoid process of ulna
radial head: oblique line of radius
flexor digitorum superficialis (FDS) distal attachment insertion
shafts (bodies) of middle phalanges of medial four digits
flexor digitorum superficialis (FDS) innervation
medial nerve
C7 C8 T1
flexor digitorum superficialis (FDS) action
- flexes proximal interphalangeal jooints of middle four digits; acting more strongly
- also flexes proximal phalanges at metacarpophalangeal joints
deep (third) layer anterior compartment of forearm
- flexor digitoum profundus (FDP)
- flexor pollicis longus (FPL)
- pronator quadratus
flexor digitoum profundus (FDP) proximal attachment, origin
proximal three quarters of medial and anterior surfaces of ulna and interosseou membrane
flexor digitoum profundus (FDP) distal attachment, insertion
base of distal phalanes of 2nd 3rd 4th and 5th digits
flexor digitoum profundus (FDP) innervation
lateral part (to digits 2 and 3): median nerve C8 T1(anterior onterosseous branch)
medial part(to digits 4 and 5):ulnar nerve C8 T1
flexor digitoum profundus (FDP) action
flexes interphalangeal joints of digits 2,3,4,5 assists with wrist flexion
flexor pollicis longus (FPL) proximal attachment origin
anterior surface of radius and adjacent interosseous membrane
flexor pollicis longus (FPL) distal attachment insertion
base of distal phalanx of thumb
flexor pollicis longus (FPL) innervation
anterior interosseous nerve from median nerve C8 T1
flexor pollicis longus (FPL) action
flaexes phalanges of first digit
thumb
Pronator quadratus proximal attachment origin
distal quarter of anterior surface of ulna
Pronator quadratus distal attachment insertion
distal quarter of anterior surface of radius
Pronator quadratus innervation
anterior interosseous nerve from median nerve C8 T1
Pronator quadratus action
- pronates forearm
- deep fibers bind radius and ulna together
