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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
Origin: Pronator Quadratus
Distal quarter of anterior surface of ulna
26
Insertion: Pronator Quadratus
Distal quarter of anterior surface of radius
27
Innervation: Pronator Quadratus
Anterior interosseous nerve, from median nerve (C8, T1)
28
Action: Pronator Quadratus
Pronates forearm; deep fibers bind radius and ulna together
29
Origin: Biceps Brachii
Short Head: tip of coracoid process of scapula Long Head: supraglenoid tubercle of scapula
30
Insertion: Biceps Brachii
Tuberosity of radius and fascia of forearm via bicippital aponeurosis
31
Innervation: Biceps Brachii
Musculocutaneous nerve (C5, C6, C7)
32
Action: Biceps Brachii
Supinates forearm and, when it is supinated, flexes forearm; short head resists dislocation of shoulder
33
Origin: Coracobrachialis
Tip of coracoid process of scapula
34
Insertion: Coracobrachialis
Middle third of medial surface of humerus
35
Innervation: Coracobrachialis
Musculocutaneous nerve (C5, C6, C7)
36
Action: Coracobrachialis
Helps flex and adduct arm; resists dislocation of shoulder
37
Origin: Brachialis
Distal half of anterior surface of humerus
38
Insertion: Brachialis
coronoid process and tuberosity ulna
39
Innervation: Brachialis
musculocutaneous nerve (C5, C6) and radial nerve (C5, C7)
40
Action: Brachialis
flexes forearm in all positions
41
Origin: Flexor Pollicis Longus (FPL)
Anterior surface of radius and adjacent interosseous membrane
42
Insertion: Flexor Pollicis Longus (FPL)
Base of distal phalanx of thumb
43
Innervation: Flexor Pollicis Longus (FPL)
Anterior interosseous nerve, from median nerve (C8, T1)
44
Action: Flexor Pollicis Longus (FPL)
Flexes phalanges of 1st digit (thumb)
45
Origin: Palmaris Brevis
Medial aspect of the palmar aponeurosis
46
Insertion: Palmaris Brevis
skin over the hypothenar eminence
47
Innervation: Palmaris Brevis
Ulnar nerve
48
Action: Palmaris Brevis
wrinkles skin of medial palm

Anatomy (25 decks)

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