pronator-flexor Muscles of forearm Flashcards
muscles of anterior compartment of forearm
intermediate layer
flexor digitorum superficialis (FDS)
muscles of anterior compartment of forearm
superficial layer
pronator teres (PT)
flexor carpi radialis (FCR)
palmaris longus
Flexor carpi ulnaris (FCU): humeral head, ulnar head
muscles of anterior compartment of forearm
deep layer
flexor digitorum profundus (FDP)
flexor policis longus (FPL)
pronator quadratus
info about flexor, pronator muscles
tendons of most flexor muscles pass across anterior surface of the wrist and are held in place by the palmar carpal ligament and the flexor retinaculum or transverse carpal ligament which are thickenings of the antebrachial fascia
info about superficial layer of flexor-pronator muscles
attached proximally by common flexor tendon to the medial epicondyle of the humerus which is the common flexor origin
pronator teres origin
ulnar head: coronoid process of ulna
humeral head: medial epicondyle of humerus
pronator teres insertion
middle of convexity of lateral surface of radius
pronator teres innervation
median nerve (C6, C7)
pronator teres action
pronates and flexes forearm
flexor carpi radialis origin
medial epicondyle of humerus
flexor carpi radialis insertion
base of 2nd (3rd) metacarpal
flexor carpi radialis innervation
Median nerve (c6, C7)
flexor carpi radialis action
flexes and abducts hand at wrist
palmaris longus origin
medial epicondyle of humerus
palmaris longus insertion
distal half 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: humeral head, ulnar head
origin
olecranon and posterior border of ulna (via aponeurosis)
flexor carpi ulnaris insertion
pisiform, hook of hamate, 5th metacarpal
flexor carpi ulnaris action
flexes and adducts hand at wrist
flexor digitorum superficialis origin
humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
radial head: oblique line of radius
flexor digitorum superficialis insertion
shafts (bodies) of middle phalanges of medial four digits
flexor digitorum superficialis innervation
median nerve (c7, c8, t1)
flexor digitorum superficialis action
flexes wrist joint
flexes proximal interphalangeal joints of middle four digits, acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints
flexor digitorum profundus origin
proximal three quarters of medial and anterior surfaces of ulna and interosseus membrane
flexor digitorum profundus insertion
bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
flexor digitorum profundus innervation
lateral part (to digits 2 and 3): Median nerve (c8, t1) (anterior interosseus branch) medial part (to digits 4 and 5): ulnar nerve (c8, T1)
flexor digitorum profundus action
flexes wrist joint
flexes distal interphalangeal joints of digits 2, 3, 4, and 5
assists with wrist flexion
flexor policis longus origin
anterior surface of radius and adjacent interosseus membrane
flexor policis longus insertion
base of distal phalanx of thumb
flexor policis longus innervation
anterior interosseus nerve, from medial nerve (C8, T1)
flexor policis longus action
flexes wrist
flexes metacarpophalangeal and interphalangeal joints of thumb
pronator quadratus origin
distal quarter of anterior surface of ulna
pronator quadratus insertion
distal quarter of anterior surface of radius
pronator quadratus innervation
anterior interosseus nerve, from median nerve (c8, T1)
pronator quadratus action
pronates forearm
deep fibers bind radius and ulna together
