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Arm muscle 2.0 Flashcards

1
Q

What is the origin of the Brachialis muscle?

A

Coronoid process of the ulna

The Brachialis muscle is primarily involved in flexing the forearm at the elbow.

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2
Q

What is the insertion point of the Brachialis?

A

Humerus

The Brachialis inserts on the humerus to facilitate elbow flexion.

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3
Q

What action does the Brachialis perform?

A

Flexes forearm at elbow

This muscle is crucial for bending the elbow joint.

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4
Q

What is the origin of the Coracobrachialis muscle?

A

Coracoid process of the scapula

This muscle originates from the scapula and plays a role in shoulder movements.

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5
Q

What are the actions of the Coracobrachialis muscle?

A
  • Flexes arm at shoulder
  • Adducts arm

The Coracobrachialis assists in moving the arm towards the body.

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6
Q

What is the origin of the Triceps brachii long head?

A

Infraglenoid tubercle of the scapula

The long head of Triceps brachii contributes to arm extension.

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7
Q

What is the insertion point of the Triceps brachii?

A

Olecranon process of the ulna

This insertion allows for effective extension of the forearm.

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8
Q

What action does the Triceps brachii perform?

A

Extends forearm at elbow

The Triceps brachii is the primary muscle responsible for extending the elbow.

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9
Q

What is the origin of the Pronator teres?

A

Medial epicondyle of the humerus

The Pronator teres originates from the humerus and aids in forearm rotation.

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10
Q

What action does the Pronator teres perform?

A

Pronates forearm

This muscle rotates the forearm so that the palm faces down.

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11
Q

What is the origin of the Flexor carpi radialis?

A

Medial epicondyle of the humerus

The Flexor carpi radialis also assists in wrist movements.

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12
Q

What are the actions of the Flexor carpi radialis?

A
  • Flexes hand at wrist
  • Abducts hand

It plays a key role in wrist flexion and lateral movement of the hand.

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13
Q

What is the insertion point of the Flexor carpi radialis?

A

2nd and 3rd metacarpals

This insertion allows the muscle to influence hand movement.

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14
Q
A
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15
Q

What is the origin of the Palmaris longus?

A

Medial epicondyle of the humerus

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16
Q

Where does the Palmaris longus insert?

A

Palmar aponeurosis

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17
Q

What action does the Palmaris longus perform?

A

Flexes hand at wrist

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18
Q

What is the origin of the Flexor carpi ulnaris?

A

Medial epicondyle of the humerus

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19
Q

Where does the Flexor carpi ulnaris insert?

A

Pisiform, Hamate, 5th metacarpal

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20
Q

What actions does the Flexor carpi ulnaris perform?

A

Flexes hand at wrist, Adducts hand

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21
Q

What is the origin of the Flexor digitorum superficialis?

A

Medial epicondyle of the humerus, Coronoid process of ulna, Shaft of radius

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22
Q

Where does the Flexor digitorum superficialis insert?

A

Middle phalanges of 2nd to 5th digit

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23
Q

What actions does the Flexor digitorum superficialis perform?

A

Flexes hand at wrist, Flexes proximal interphalangeal joints

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24
Q

What is the origin of the Flexor digitorum profundus?

A

Ulna, Interosseous membrane

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25
Q

Where does the Flexor digitorum profundus insert?

A

Distal phalanges of 2nd to 5th digit

26
Q

What action does the Flexor digitorum profundus perform?

A

Flexes distal interphalangeal joints

27
Q

What is the origin of the Flexor pollicis longus?

A

Anterior radius, Interosseous membrane

28
Q

Where does the Flexor pollicis longus insert?

A

Distal phalanx of pollex

29
Q

What action does the Flexor pollicis longus perform?

A

Flexes 1st interphalangeal joints

30
Q

What is the action of the pronator quadratus?

A

Pronates forearm

The pronator quadratus is located in the anterior compartment of the forearm.

31
Q

What is the origin of the brachioradialis?

A

Lateral supracondylar ridge of the humerus

The brachioradialis is part of the posterior compartment of the forearm.

32
Q

What is the insertion of the brachioradialis?

A

Styloid process of the radius

This muscle flexes the forearm at the elbow.

33
Q

What actions does the brachioradialis perform?

A
  • Flexes forearm at elbow
  • Stabilizes elbow during flexion and extension

The brachioradialis is key for elbow stability.

34
Q

What is the origin of the extensor carpi radialis longus?

A

Lateral supracondylar ridge of the humerus

This muscle is involved in extending and abducting the hand.

35
Q

What is the action of the extensor carpi radialis longus?

A
  • Extends hand at wrist
  • Abducts hand

It is located in the posterior compartment of the forearm.

36
Q

What is the origin of the extensor carpi radialis brevis?

A

Lateral epicondyle of the humerus

This muscle also contributes to wrist movements.

37
Q

What is the action of the extensor carpi radialis brevis?

A
  • Extends hand at wrist
  • Abducts hand

It works alongside the extensor carpi radialis longus.

38
Q

What is the origin of the extensor digitorum?

A

Lateral epicondyle of the humerus

This muscle is responsible for extending the fingers.

39
Q

What are the actions of the extensor digitorum?

A
  • Extends distal interphalangeal joints
  • Extends hand at wrist

It acts on the 2nd to 5th digits.

40
Q

Fill in the blank: The pronator quadratus inserts at the _______.

A

radius

It is located distally and anteriorly.

41
Q

Fill in the blank: The extensor carpi radialis longus inserts at the _______.

A

2nd metacarpal

This muscle is involved in wrist extension.

42
Q

True or False: The extensor digitorum only extends the proximal interphalangeal joints.

A

False

It extends both distal interphalangeal joints and the hand at the wrist.

43
Q

What is the origin of the extensor carpi ulnaris?

A

Lateral epicondyle of the humerus, posterior ulna

The extensor carpi ulnaris is a muscle located in the posterior compartment of the forearm.

44
Q

What is the insertion point of the extensor carpi ulnaris?

A

5th metacarpal

This muscle contributes to wrist movement.

45
Q

What actions does the extensor carpi ulnaris perform?

A
  • Extends hand
  • Adducts hand
  • Supinates forearm

These actions are essential for various hand movements.

46
Q

What is the origin of the supinator muscle?

A

Lateral epicondyle of the humerus, proximal ulna

The supinator muscle assists in the supination of the forearm.

47
Q

What is the action of the supinator muscle?

A

Abducts pollex

The supinator is crucial for thumb movement.

48
Q

What is the origin of the abductor pollicis longus?

A

Posterior radius, posterior ulna, interosseus membrane

This muscle plays a role in thumb abduction.

49
Q

What is the insertion point of the abductor pollicis longus?

A

Trapezium, 1st metacarpal

The abductor pollicis longus facilitates thumb movement.

50
Q

What is the origin of the extensor pollicis brevis?

A

Posterior radius, posterior ulna, interosseus membrane

This muscle is involved in thumb extension.

51
Q

What is the insertion point of the extensor pollicis brevis?

A

Proximal phalanx of pollex

It specifically extends the 1st metacarpal-phalangeal joint.

52
Q

What is the origin of the extensor pollicis longus?

A

Posterior radius, posterior ulna, interosseus membrane

This muscle is important for the extension of the thumb.

53
Q

What is the insertion point of the extensor pollicis longus?

A

Distal phalanx of pollex

It extends the 1st interphalangeal joint.

54
Q

What is the origin of the Extensor indicis muscle?

A

Posterior ulna and interosseus membrane

55
Q

What is the insertion point of the Extensor indicis?

A

Distal phalanx of 2nd digit

56
Q

What is the action of the Extensor indicis?

A

Extends 2nd distal interphalangeal joint

57
Q

What is the origin of the Extensor digiti minimi?

A

Lateral epicondyle of humerus

58
Q

What is the insertion point of the Extensor digiti minimi?

A

Distal phalanx of 5th digit

59
Q

What is the action of the Extensor digiti minimi?

A

Extends 5th distal interphalangeal joint

60
Q

What muscle abducts the pollex?

A

Abductor pollicis

Muscles (6 decks)

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