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Anatomy > Arm And Cubital Fossa Muscles > Flashcards

Arm And Cubital Fossa Muscles Flashcards

1
Q

Biceps brachii (short head) origin

A

Tip of coracoid process of scapula (w/coracobrachialis)

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2
Q

Biceps brachii insertion

A

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

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3
Q

Biceps brachii action

A
  • supinates the pronated forearm
  • flexes the supine forearm
  • flexes arm
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4
Q

Biceps brachii innervation

A

Musculocutaneous nerve (C5-7)

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5
Q

Biceps brachii (long head) origin

A

Supraglenoid tubercle of scapula

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6
Q

Brachialis origin

A

Distal 1/2 of anterior surface of humerus

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7
Q

Brachialis insertion

A

Coronoid process of ulna

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8
Q

Brachialis action

A

Flexes forearm in all positions (main flexor of forearm)

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9
Q

Brachialis innervation

A

Musculocutaneous nerve (C5-6)

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10
Q

Coracobrachialis origin

A

Tip of coracoid process of scapula (w/ short head of biceps brachii)

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11
Q

Coracobrachialis insertion

A

Middle 1/3 of medial surface of humerus

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12
Q

Coracobrachialis action

A

Helps flex and adduct the arm

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13
Q

Coracobrachialis innervation

A

Musculocutaneous nerve (C5-6)

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14
Q

Triceps brachii (long head) origin

A

Infraglenoid process of scapula

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15
Q

Triceps brachii (lateral head) origin

A

Posterior surface of humerus (superior to radial groove)

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16
Q

Triceps brachii (medial head) origin

A

Posterior surface of humerus (inferior to radial groove)

17
Q

Triceps brachii insertion

A

Proximal end of olecranon of ulna and fascia of forearm

18
Q

Triceps brachii action

A
  • extends forearm (chief extensor of forearm)

- long head steadies head of abducted humerus and assists in extension and adduction of arm

19
Q

Triceps brachii innervation

A

Radial nerve (C6-8)

20
Q

Anconeus origin

A

Lateral epicondyle of humerus

21
Q

Anconeus insertion

A
  • lateral surface of olecranon process

- superior part of posterior surface of ulna

22
Q

Anconeus action

A
  • assists triceps in extending forearm
  • stabilizes elbow joint
  • abducts ulna during pronation
23
Q

Anconeus innervation

A

Radial nerve (C7-T1)

Anatomy (11 decks)

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