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Gross > pronator-flexor Muscles of forearm > Flashcards

pronator-flexor Muscles of forearm Flashcards

0
Q

muscles of anterior compartment of forearm

intermediate layer

A

flexor digitorum superficialis (FDS)

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1
Q

muscles of anterior compartment of forearm

superficial layer

A

pronator teres (PT)
flexor carpi radialis (FCR)
palmaris longus
Flexor carpi ulnaris (FCU): humeral head, ulnar head

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2
Q

muscles of anterior compartment of forearm

deep layer

A

flexor digitorum profundus (FDP)
flexor policis longus (FPL)
pronator quadratus

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3
Q

info about flexor, pronator muscles

A

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

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4
Q

info about superficial layer of flexor-pronator muscles

A

attached proximally by common flexor tendon to the medial epicondyle of the humerus which is the common flexor origin

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5
Q

pronator teres origin

A

ulnar head: coronoid process of ulna

humeral head: medial epicondyle of humerus

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6
Q

pronator teres insertion

A

middle of convexity of lateral surface of radius

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7
Q

pronator teres innervation

A

median nerve (C6, C7)

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8
Q

pronator teres action

A

pronates and flexes forearm

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9
Q

flexor carpi radialis origin

A

medial epicondyle of humerus

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10
Q

flexor carpi radialis insertion

A

base of 2nd (3rd) metacarpal

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11
Q

flexor carpi radialis innervation

A

Median nerve (c6, C7)

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12
Q

flexor carpi radialis action

A

flexes and abducts hand at wrist

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13
Q

palmaris longus origin

A

medial epicondyle of humerus

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14
Q

palmaris longus insertion

A

distal half of flexor retinaculum, palmar aponeurosis

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15
Q

palmaris longus innervation

A

median nerve (c7, c8)

16
Q

palmaris longus action

A

flexes hand (at wrist) and tenses palmar aponeurosis

17
Q

flexor carpi ulnaris: humeral head, ulnar head

origin

A

olecranon and posterior border of ulna (via aponeurosis)

18
Q

flexor carpi ulnaris insertion

A

pisiform, hook of hamate, 5th metacarpal

19
Q

flexor carpi ulnaris action

A

flexes and adducts hand at wrist

20
Q

flexor digitorum superficialis origin

A

humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
radial head: oblique line of radius

21
Q

flexor digitorum superficialis insertion

A

shafts (bodies) of middle phalanges of medial four digits

22
Q

flexor digitorum superficialis innervation

A

median nerve (c7, c8, t1)

23
Q

flexor digitorum superficialis action

A

flexes wrist joint
flexes proximal interphalangeal joints of middle four digits, acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints

24
Q

flexor digitorum profundus origin

A

proximal three quarters of medial and anterior surfaces of ulna and interosseus membrane

25
Q

flexor digitorum profundus insertion

A

bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits

26
Q

flexor digitorum profundus innervation

A 
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)
27
Q

flexor digitorum profundus action

A

flexes wrist joint
flexes distal interphalangeal joints of digits 2, 3, 4, and 5
assists with wrist flexion

28
Q

flexor policis longus origin

A

anterior surface of radius and adjacent interosseus membrane

29
Q

flexor policis longus insertion

A

base of distal phalanx of thumb

30
Q

flexor policis longus innervation

A

anterior interosseus nerve, from medial nerve (C8, T1)

31
Q

flexor policis longus action

A

flexes wrist

flexes metacarpophalangeal and interphalangeal joints of thumb

32
Q

pronator quadratus origin

A

distal quarter of anterior surface of ulna

33
Q

pronator quadratus insertion

A

distal quarter of anterior surface of radius

34
Q

pronator quadratus innervation

A

anterior interosseus nerve, from median nerve (c8, T1)

35
Q

pronator quadratus action

A

pronates forearm

deep fibers bind radius and ulna together

Gross (31 decks)

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