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Hands > Forearm & Hand Muscles > Flashcards

Forearm & Hand Muscles Flashcards

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)

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)

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)

A

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

Innervation:
- Median (C6,7)

25
Q

Pronator Quadratus (Origin/Insertion)

A

Origin:
- Medial, anterior surface of distal ulna

Insertion:
- Lateral, anterior surface of distal radius

26
Q

Pronator Quadratus (Action/Innervation)

A

Action:
- Pronate the forearm (Radioulnar joint)

Innervation:
- Median (C7,8 & T1)

27
Q

Supinator (Origin/Insertion)

A

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
Q

Supinator (Action/Innervation)

A

Action:
- Supinate the forearm (Radioulnar joint)

Innervation:
- Radial (C5,6,7)

29
Q

Abductor Pollicis Longus (Origin/Insertion)

A

Origin:
- Posterior surface of radius and ulna
- Interosseous membrane

Insertion:
- Base of the first metacarpal

30
Q

Abductor Pollicis Longus (Action/Innervation)

A

Action:
- ABduct the thumb (CMC joint)
- Extend the thumb (CMC joint)
- ABduct the wrist (Radiocarpal joint)

Innervation:
- Radial (C6,7,8)

31
Q

Extensor Pollicis Longus and Brevis (Origin/Insertion)

A

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
Q

Extensor Pollicis Longus and Brevis (Action/Innervation)

A

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
Q

Flexor Pollicis Longus (Origin/Insertion)

A

Origin:
- Anterior surface of radius
- Interosseous membrane

Insertion:
- Base of distal phalanx of thumb

34
Q

Flexor Pollicis Longus (Action/Innervation)

A

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
Q

Abductor Pollicis Brevis (Origin/Insertion)

A

Origin:
- Flexor retinaculum
- Trapezium
- Scaphoid tubercles

Insertion:
- Base of proximal phalanx of thumb

36
Q

Abductor Pollicis Brevis (Action/Insertion)

A

Action:
- ABduct the thumb (CMC and MCP joints)
- Assist in opposition of the thumb

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

37
Q

Flexor Pollicis Brevis (Origin/Insertion)

A

Origin:
1. Superficial Head:
- Flexor retinaculum
2. Deep Head:
- Trapezium
- Trapezoid
- Capitate

Insertion:
- Base of proximal phalanx of thumb

38
Q

Flexor Pollicis Brevis (Action/Innervation)

A

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
Q

Opponens Pollicis (Origin/Insertion)

A

Origin:
- Flexor retinaculum
- Tubercle of the trapezium

Innervation:
- Entire length of first metacarpal bone, radial side

40
Q

Opponens Pollicis (Action/Innervation)

A

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
Q

Adductor Pollicis (Origin/Insertion)

A

Origin:
- Capitate
- Second and third metacarpals

Insertion:
- Base of proximal phalanx of thumb

42
Q

Adductor Pollicis (Action/Innervation)

A

Action:
- Adduct the thumb (CMC and MCP joints)
- Assist to flex the thumb (MCP joint)

Innervation:
- Ulnar (C8 & T1)

43
Q

Lumbricals of the Hand (Origin/Insertion)

A

Origin:
- Surfaces of the flexor digitorum profundus tendons

Insertion:
- Extensor aponeurosis on dorsal surface of phalanges

44
Q

Lumbricals of the Hand (Action/Innervation)

A

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
Q

Palmar Interossei (Origin/Insertion)

A

Origin:
- Base of first, second, fourth and fifth metacarpals

Insertion:
- Base of the proximal phalanx of the related finger and the extensor aponeurosis

46
Q

Palmar Interossei (Action/Innervation)

A

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
Q

Dorsal Interossei (Origin/Insertion)

A

Origin:
- Adjacent sides of all metacarpals

Insertion:
- Base of the proximal phalanx of the second, third, and fourth fingers
- Extensor aponeurosis

48
Q

Dorsal Interossei (Action/Innervation)

A

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
Q

Abductor Digiti Minimi (Origin/Insertion)

A

Origin:
- Pisiform
- Tendon of the flexor carpi Ulnaris

Insertion:
- Base of proximal phalanx of the fifth finger, ulnar surface

50
Q

Abductor Digiti Minimi (Action/Innervation)

A

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
Q

Flexor Digiti Minimi Brevis (Origin/Insertion)

A

Origin:
- Hook of the hamate
- Flexor retinaculum

Insertion:
- Base of the proximal phalanx of fifth fingers, palmar surface

52
Q

Flexor Digiti Minimi Brevis (Action/Innervation)

A

Action:
- Flex the fifth finger (MCP joint)
- Assist in opposition of the fifth finger toward the thumb

Innervation:
- Ulnar (C7,8 & T1)

53
Q

Opponens Digiti Minimi (Origin/Insertion)

A

Origin:
- Hook of the hamate
- Flexor retinaculum

Insertion:
- Shaft of fifth metacarpal, ulnar surface

54
Q

Opponens Digiti Minimi (Action/Innervation)

A

Action:
- Opposition of the fifth finger at the CMC joint

Innervation:
- Ulnar (C7,8 & T1)

Hands (5 decks)

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