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MSAK-1 > Muscles of the Anterior/Posterior Compartment of the Arm > Flashcards

Muscles of the Anterior/Posterior Compartment of the Arm Flashcards

1
Q

What nerve innervates all muscles in the anterior/flexor compartment?

A

musculocutaneous

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2
Q

What muscles does the anterior/flexor compartment contain?

A

biceps brachii, coracobrachialis, brachialis

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3
Q

What is the origin of the biceps brachii?

A

Short head: coracoid process of scapula

Long head: supraglenoid tubercle of the scapula

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4
Q

What is the insertion of the biceps brachii?

A

radial tuberoidity and bicipital aponeurosis

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5
Q

What are the functions of the biceps brachii?

A
  1. flex of the arm @ GHJ
  2. flex of forearm @ elbow joint
  3. supination of forearm @ radioulnar joints
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6
Q

What nerve innervates the biceps brachii?

A

musculocutaneous nerve

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7
Q

What is the origin of the coracobrachialis?

A

coracoid process of scapula

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8
Q

What is the insertion of the coracobrachialis

A

middle portion of the medial surface of the humerus

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9
Q

What are the functions of the coracobrachialis?

A
  1. flex of arm @ GHJ

2. add of arm @ GHJ

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10
Q

What nerve innervates the coracobrachialis?

A

musculocutaneous nerve

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11
Q

What is the origin of the brachialis?

A

distal half of the anterior surface of the humerus

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12
Q

What is the insertion of the brachialis?

A

ulnar tuberosity

coronoid process of ulna

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13
Q

What are the functions of the brachialis?

A

flex of forearm @ elbow joint

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14
Q

What nerve innervates the brachialis?

A

musculocutaneous nerve

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15
Q

What is the origin of the long head of the triceps brachii?

A

infraglenoid tubercle of scapula

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16
Q

What is the origin of the lateral head of the triceps brachii?

A

lateral posterior humerous (superior to radial groove)

17
Q

What is the origin of the medial head of the triceps brachii?

A

rest of posterior surface of humerus (inferior to radial groove)

18
Q

What is the insertion of the triceps brachii?

A

olecranon process of ulna

19
Q

What are the functions of the triceps brachii

A
  1. ext of forearm @ elbow joint

2. ext of arm @ GHJ (long head)

20
Q

What movement does only the long head of the triceps brachii that the other heads do not?

A

extension of the arm @ GHJ

21
Q

What nerve innervates the triceps brachii

A

radial nerve

MSAK-1 (19 decks)

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