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Anatomy > O & I: Forearm Flexors > Flashcards

O & I: Forearm Flexors Flashcards

1
Q

Origin: Pronator Teres

A

Ulnar Head: Coronoid Process

Humeral Head: Medial epicondyle of humerus (common flexor origin)

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2
Q

Insertion: Pronator Teres

A

Middle of convexity of lateral surface of radius

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3
Q

Innervation: Pronator Teres

A

Median nerve (C6, C7)

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4
Q

Action: Pronator Teres

A

Pronates and flexes forearm (at elbow)

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5
Q

Origin: Flexor Carpi Radialis (FCR)

A

Medial epicondyle of humerus

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6
Q

Insertion: Flexor Carpi Radialis (FCR)

A

Base of 2nd metacarpal

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7
Q

Innervation: Flexor Carpi Radialis (FCR)

A

Median Nerve (C6, C7)

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8
Q

Action: Flexor Carpi Radialis (FCR)

A

Flexes and abducts hand (at wrist)

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9
Q

Origin: Palmaris Longus

A

Medial epicondyle of humerus

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10
Q

Insertion: Palmaris Longus

A

Distal half of flexor retinaculum and apex of palmar aponeurosis

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11
Q

Innervation: Palmaris Longus

A

Median nerve (C7, C8)

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12
Q

Action: Palmaris Longus

A

Flexes hand (at wrist) and tenses palmar aponeurosis

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13
Q

Origin: Flexor Carpi Ulnaris (FCU)

A

Humeral Head: Medial epicondyle of humerus

Ulnar Head: Olecranon and posterior border of ulna (via aponeurosis)

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14
Q

Insertion: Flexor Carpi Ulnaris (FCU)

A

Pisiform, hook of hamate, 5th metacarpal

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15
Q

Innervation: Flexor Carpi Ulnaris (FCU)

A

Ulnar Nerve (C7, C8)

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16
Q

Action: Flexor Carpi Ulnaris (FCU)

A

Flexes and adducts hand (at wrist)

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17
Q

Origin: Flexor Digitorum Superficialis (FDS)

A

Humero-ulnar Head: medial epicondyle and coronoid process

Radial Head: Superior half of anterior border

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18
Q

Insertion: Flexor Digitorum Superficialis (FDS)

A

Shafts of middle phalanges of medial four digits

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19
Q

Innervation: Flexor Digitorum Superficialis (FDS)

A

Median Nerve (C7, C8, T1)

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20
Q

Action: Flexor Digitorum Superficialis (FDS)

A

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

21
Q

Origin: Flexor Digitorum Profundus (FDP)

A

Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane

22
Q

Insertion: Flexor Digitorum Profundus (FDP)

A

Medial Part: Bases of distal phalanges of 4th and 5th digits

Lateral Part: Bases of distal phalanges of 2nd and 3rd digits

23
Q

Innervation: Flexor Digitorum Profundus (FDP)

A

Medial Part: Ulnar Nerve (C8, T1)

Lateral Part: Anterior interosseous nerve, from median nerve (C8, T1)

24
Q

Action: Flexor Digitorum Profundus (FDP)

A

Medial Part: Flexes distal phlanges 4 and 5 at distal interphlangeal joints

Lateral Part: Flexes distal phlanges 2 and 3 at distal interphalangeal joints

25
Q

Origin: Pronator Quadratus

A

Distal quarter of anterior surface of ulna

26
Q

Insertion: Pronator Quadratus

A

Distal quarter of anterior surface of radius

27
Q

Innervation: Pronator Quadratus

A

Anterior interosseous nerve, from median nerve (C8, T1)

28
Q

Action: Pronator Quadratus

A

Pronates forearm; deep fibers bind radius and ulna together

29
Q

Origin: Biceps Brachii

A

Short Head: tip of coracoid process of scapula

Long Head: supraglenoid tubercle of scapula

30
Q

Insertion: Biceps Brachii

A

Tuberosity of radius and fascia of forearm via bicippital aponeurosis

31
Q

Innervation: Biceps Brachii

A

Musculocutaneous nerve (C5, C6, C7)

32
Q

Action: Biceps Brachii

A

Supinates forearm and, when it is supinated, flexes forearm; short head resists dislocation of shoulder

33
Q

Origin: Coracobrachialis

A

Tip of coracoid process of scapula

34
Q

Insertion: Coracobrachialis

A

Middle third of medial surface of humerus

35
Q

Innervation: Coracobrachialis

A

Musculocutaneous nerve (C5, C6, C7)

36
Q

Action: Coracobrachialis

A

Helps flex and adduct arm; resists dislocation of shoulder

37
Q

Origin: Brachialis

A

Distal half of anterior surface of humerus

38
Q

Insertion: Brachialis

A

coronoid process and tuberosity ulna

39
Q

Innervation: Brachialis

A

musculocutaneous nerve (C5, C6) and radial nerve (C5, C7)

40
Q

Action: Brachialis

A

flexes forearm in all positions

41
Q

Origin: Flexor Pollicis Longus (FPL)

A

Anterior surface of radius and adjacent interosseous membrane

42
Q

Insertion: Flexor Pollicis Longus (FPL)

A

Base of distal phalanx of thumb

43
Q

Innervation: Flexor Pollicis Longus (FPL)

A

Anterior interosseous nerve, from median nerve (C8, T1)

44
Q

Action: Flexor Pollicis Longus (FPL)

A

Flexes phalanges of 1st digit (thumb)

45
Q

Origin: Palmaris Brevis

A

Medial aspect of the palmar aponeurosis

46
Q

Insertion: Palmaris Brevis

A

skin over the hypothenar eminence

47
Q

Innervation: Palmaris Brevis

A

Ulnar nerve

48
Q

Action: Palmaris Brevis

A

wrinkles skin of medial palm

Anatomy (25 decks)

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