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Forearm & Hand Muscles Flashcards

(54 cards)

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1
Q

Brachialis (Origin/Insertion)

A

Origin:
- Distal half of anterior surface of humerus

Insertion:
- Tuberosity and coronoid process of ulna

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2
Q

Brachialis (Action/Innervation)

A

Action:
- Flex the elbow (Humeroulnar joint)

Innervation:
- Musculocutaneous & small branch from radius (C5,6)

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3
Q

Extensor Carpi Radialis Longus & Brevis (Origin/Insertion)

A

Origin:
1. Longus:
- Distal one-third of the lateral supracondylar ridge of the humerus
2. Brevis:
- Common extensor tendon from the lateral epicondyle of the humerus

Insertion:
1. Longus:
- Base of the second metacarpal
2. Brevis:
- Base of the third metacarpal

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4
Q

Extensor Carpi Radialis Longus & Brevis (Action/Innervation)

A

Action:
- Extend the wrist (Radiocarpal joint)
- ABduct the wrist (R/C joint)
- Assist to flex the elbow (Humeroulnar joint)

Innervation:
1. Longus:
- Radial (C5,6,7,8)
2. Brevis:
- Radial (C6,7,8)

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5
Q

Extensor Carpi Ulnaris (Origin/Insertion)

A

Origin:
- Common extensor tendon from the lateral epicondyle of the humerus

Insertion:
- Base of the fifth metacarpal

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6
Q

Extensor Carpi Ulnaris (Action/Innervation)

A

Action:
- Extend the wrist (Radiocarpal joint)
- Adduct the wrist (R/C joint)

Innervation:
- Radial (C6,7,8)

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7
Q

Extensor Digitorum (Origin/Insertion)

A

Origin:
- Common extensor tendon from the lateral epicondyle of the humerus

Insertion:
- Bases of middle and distal phalanges of second through fifth fingers

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8
Q

Extensor Digitorum (Action/Innervation)

A

Action:
- Extend the second through fifth fingers (Metacarpophalangeal and interphalangeal joints)
- Assist the extend the wrist (Radiocarpal joint)

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9
Q

Anconeus (Origin/Insertion)

A

Origin:
- Lateral epicondyle of the humerus

Insertion:
- Olecranon process and posterior, proximal surface of the ulna

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10
Q

Anconeus (Action/Innervation)

A

Action:
- Extend the elbow (Humeroulnar joint)

Innervation:
- Radial (C7,8)

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11
Q

Extensor Indicis (Origin/Insertion)

A

Origin:
- Posterior surface of distal shaft of ulna and interosseous membrane

Insertion:
- Tendon of the extensor digitorum at the level of the second metacarpal

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12
Q

Extensor Indicis (Action/Innervation)

A

Action:
- Extend the second finger (Metacarpophalangeal joint)
- Adduct the second finger
- May assist to extend the wrist (Radiocarpal joint)

Innervation:
- Radial (C6,7,8)

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13
Q

Flexor Carpi Radialis (Origin/Insertion)

A

Origin:
- Common flexor tendon from the medial epicondyle of the humerus

Insertion:
- Bases of the second and third metacarpals

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14
Q

Flexor Carpi Radialis (Action/Innervation)

A

Action:
- Flex the wrist (Radiocarpal joint)
- ABduct the wrist (R/C joint)
- May assist to flex the elbow (Humeroulnar joint)

Innervation:
- Median (C6,7,8)

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15
Q

Palmaris Longus (Origin/Insertion)

A

Origin:
- Common flexor tendon from the medial epicondyle of the humerus

Insertion:
- Flexor retinaculum and palmar aponeurosis

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16
Q

Palmaris Longus (Action/Innervation)

A

Action:
- Tense the palmar fascia
- Flex the wrist (Radiocarpal joint)
- May assist to flex the elbow (Humeroulnar joint)

Innervation:
- Median (C6,7,8 & T1)

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17
Q

Flexor Carpi Ulnaris (Origin/Insertion)

A

Origin:
1. Humeral Head:
- Common flexor tendon from the medial epicondyle of the humerus
2. Ulnar Head:
- Posterior surface of proximal two-thirds of ulna

Insertion:
- Pisiform, hook of the hamate, and base of the fifth metacarpal

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18
Q

Flexor Carpi Ulnaris (Action/Innervation)

A

Action:
- Flex the wrist (Radiocarpal joint)
- Adduct the wrist (R/C joint)
- Assist to flex the elbow (Humeroulnar joint)

Innervation:
- Ulnar (C7,8 & T1)

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19
Q

Flexor Digitorum Superficialis (Origin/Insertion)

A

Origin:
- Common flexor tendon from the medial epicondyle of the humerus
- Ulnar collateral ligament
- Coronoid process of the ulna
- Interosseous membrane
- Proximal shaft of the radius

Insertion:
- Sides of middle phalanges of second through fifth fingers

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20
Q

Flexor Digitorum Superficialis (Action/Innervation)

A

Action:
- Flex the second through fifth fingers (MCP and PIP joints)
- Flex the wrist (Radiocarpal joint)

Innervation:
- Median (C7,8 & T1)

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21
Q

Flexor Digitorum Profundus (Origin/Insertion)

A

Origin:
- Anterior and medial surfaces of proximal three-quarters of ulna

Insertion:
- Bases of distal phalanges, palmar surface of second through fifth fingers

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22
Q

Flexor Digitorum Profundus (Action/Innervation)

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A

Action:
- Flex the second through fifth fingers (MCP & DIP joints)
- Assist to flex the wrist (Radiocarpal joint)

Innervation:
- Second and third fingers: Median (C7,8 & T1)
- Fourth and fifth fingers: Ulnar (C7,8 & T1)

23
Q

Pronator Teres (Origin/Insertion)

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A

Origin:
- Common flexor tendon from the medial epicondyle of the humerus
- Coronoid process of the ulna

Insertion:
- Middle of lateral surface of the radius

24
Q

Pronator Teres (Action/Innervation)

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A

Action:
- Pronate the forearm (Radioulnar joint)
- Assist to flex the elbow (Humeroulnar joint)

Innervation:
- Median (C6,7)

25
Pronator Quadratus (Origin/Insertion)
Origin: - Medial, anterior surface of distal ulna Insertion: - Lateral, anterior surface of distal radius
26
Pronator Quadratus (Action/Innervation)
Action: - Pronate the forearm (Radioulnar joint) Innervation: - Median (C7,8 & T1)
27
Supinator (Origin/Insertion)
Origin: - Lateral epicondyle of the humerus - Radial collateral ligament - Annular ligament - Supinator crest of the ulna Insertion: - Anterior, lateral surface of proximal one-third of the Radial shaft
28
Supinator (Action/Innervation)
Action: - Supinate the forearm (Radioulnar joint) Innervation: - Radial (C5,6,7)
29
Abductor Pollicis Longus (Origin/Insertion)
Origin: - Posterior surface of radius and ulna - Interosseous membrane Insertion: - Base of the first metacarpal
30
Abductor Pollicis Longus (Action/Innervation)
Action: - ABduct the thumb (CMC joint) - Extend the thumb (CMC joint) - ABduct the wrist (Radiocarpal joint) Innervation: - Radial (C6,7,8)
31
Extensor Pollicis Longus and Brevis (Origin/Insertion)
Origin: 1. Longus: - Posterior surface of the ulna - Interosseous membrane 2. Brevis: - Posterior surface of the radius - Interosseous membrane Insertion: 1. Longus: - Base of distal phalanx of thumb 2. Brevis: - Base of proximal phalanx of thumb
32
Extensor Pollicis Longus and Brevis (Action/Innervation)
Action: - EPL Only: Extend the thumb (IP joint) - Extend the thumb (MCP and CMC joints) - ABduct the wrist (Radiocarpal joint) Innervation: - Radial (C6,7,8)
33
Flexor Pollicis Longus (Origin/Insertion)
Origin: - Anterior surface of radius - Interosseous membrane Insertion: - Base of distal phalanx of thumb
34
Flexor Pollicis Longus (Action/Innervation)
Action: - Flex the thumb (IP joint) - Flex the thumb (MCP and CMC joints) - Assist to flex the wrist (Radiocarpal joint) Innervation: - Median (C6,7,8 & T1)
35
Abductor Pollicis Brevis (Origin/Insertion)
Origin: - Flexor retinaculum - Trapezium - Scaphoid tubercles Insertion: - Base of proximal phalanx of thumb
36
Abductor Pollicis Brevis (Action/Insertion)
Action: - ABduct the thumb (CMC and MCP joints) - Assist in opposition of the thumb Innervation: - Median (C6,7,8 & T1)
37
Flexor Pollicis Brevis (Origin/Insertion)
Origin: 1. Superficial Head: - Flexor retinaculum 2. Deep Head: - Trapezium - Trapezoid - Capitate Insertion: - Base of proximal phalanx of thumb
38
Flexor Pollicis Brevis (Action/Innervation)
Action: - Flex the thumb (CMC and MCP joints) - Assist in opposition of the thumb Innervation: 1. Superficial Head: - Median (C6,7,8 & T1) 2. Deep Head: - Ulnar (C8 & T1)
39
Opponens Pollicis (Origin/Insertion)
Origin: - Flexor retinaculum - Tubercle of the trapezium Innervation: - Entire length of first metacarpal bone, radial side
40
Opponens Pollicis (Action/Innervation)
Action: - Opposition of the thumb at the CMC joint (bringing the pads of the thumb and fifth fingers together) Innervation: - Median (C6,7,8 & T1)
41
Adductor Pollicis (Origin/Insertion)
Origin: - Capitate - Second and third metacarpals Insertion: - Base of proximal phalanx of thumb
42
Adductor Pollicis (Action/Innervation)
Action: - Adduct the thumb (CMC and MCP joints) - Assist to flex the thumb (MCP joint) Innervation: - Ulnar (C8 & T1)
43
Lumbricals of the Hand (Origin/Insertion)
Origin: - Surfaces of the flexor digitorum profundus tendons Insertion: - Extensor aponeurosis on dorsal surface of phalanges
44
Lumbricals of the Hand (Action/Innervation)
Action: - Extend the second through fifth fingers at the IP joints - Flex the second through fifth fingers at the MCP joints Innervation: 1. Second and third fingers: - Median (C6,7,8 & T1) 2. Fourth and fifth fingers: - Ulnar (C7,8 & T1)
45
Palmar Interossei (Origin/Insertion)
Origin: - Base of first, second, fourth and fifth metacarpals Insertion: - Base of the proximal phalanx of the related finger and the extensor aponeurosis
46
Palmar Interossei (Action/Innervation)
Action: - Adduct the thumb, second, fourth, and fifth fingers toward the third finger - Assist to flex the thumb, second, fourth, and fifth fingers at the MCP joints - Assist to extend the thumb, second, fourth, and fifth fingers at the IP joints Innervation: - Ulnar (C8 & T1)
47
Dorsal Interossei (Origin/Insertion)
Origin: - Adjacent sides of all metacarpals Insertion: - Base of the proximal phalanx of the second, third, and fourth fingers - Extensor aponeurosis
48
Dorsal Interossei (Action/Innervation)
Action: - ABduct the second, third, and fourth fingers at the MCP joints - Assist to flex the second, third, and fourth fingers at the at the MCP joints - Assist to extend the second, third, and fourth fingers at the IP joints Innervation: - Ulnar (C8 & T1)
49
Abductor Digiti Minimi (Origin/Insertion)
Origin: - Pisiform - Tendon of the flexor carpi Ulnaris Insertion: - Base of proximal phalanx of the fifth finger, ulnar surface
50
Abductor Digiti Minimi (Action/Innervation)
Action: - ABduct the fifth finger (MCP joint) - Assist in opposition of the fifth fingers toward the thumb (MCP joint) Innervation: - Ulnar (C7,8 & T1)
51
Flexor Digiti Minimi Brevis (Origin/Insertion)
Origin: - Hook of the hamate - Flexor retinaculum Insertion: - Base of the proximal phalanx of fifth fingers, palmar surface
52
Flexor Digiti Minimi Brevis (Action/Innervation)
Action: - Flex the fifth finger (MCP joint) - Assist in opposition of the fifth finger toward the thumb Innervation: - Ulnar (C7,8 & T1)
53
Opponens Digiti Minimi (Origin/Insertion)
Origin: - Hook of the hamate - Flexor retinaculum Insertion: - Shaft of fifth metacarpal, ulnar surface
54
Opponens Digiti Minimi (Action/Innervation)
Action: - Opposition of the fifth finger at the CMC joint Innervation: - Ulnar (C7,8 & T1)

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