Arm Muscles. 440 - Flashcards Preview

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Flashcards in Arm Muscles. 440 - Deck (28)
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Transverse humeral ligament

Passes from the lesser to the greater tubercle of humerus and converts the intertubercular groove into a canal for the tendon of the long head of the biceps

1

Cubital fossa boundaries

Superiorly - an imaginary line connecting the medial and lateral epicondyles
Medially- the pronator teres
Laterally- the brachioradialis


2

The contents of the cubital fossa

brachial artery
Bicep brachii tendon
Median nerve
Radial nerve, dividing into superficial and deep branches

3

Cubital fossa roof

Roof- brachial and antebrachial(deep) fascia

reinforced by the bicipitalvaponeurosis, subcutaneous tissue, and skin

4

Cubital fossa floor

Floor- brachialis and supinator muscles

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Biceps brachii (short head) proximal attachment

Tip of coracoid process of scapula

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Biceps brachii(long head) proximal attachment

Supraglenoid tubercle of scapula

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Biceps brachii innervation

Musculocutaneous nerve (c5,c6)

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Bicep brachii action

Supinates forearm
Flexes forearm when already supinated
Flexes arm

9

Brachialis proximal attachment

Distal half of the anterior Surface of the humerus

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Brachialis distal attachment

Ulnar tuberosity and coronoid process

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Brachialis innervation

Musculocutaneous nerve(c5 c6)

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Brachialis action

Flexes forearm in all positions

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Coracobrachialis proximal attachment

Tip of the coracoid process of scapula

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Coracobrachialis distal attachment

Middle third of medial surface of humerus

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Cocacobrachialis innervation

Musculocutaneous nerve (c5,c6,c7)

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Coracobrachialis action

Helps flex and adduct arm

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Biceps brachii distal attachment

Radial tuberosity
Fascia of forearm via bicipital aponeurosis

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Triceps brachii (long head) proximal attachment

Infraglenoid tubercle of scapula

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Triceps brachii (lateral head) proximal attachment

Posterior surface of humerus, superior to radial groove

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Triceps brachii (medial head) proximal attachment

Posterior surface of humerus, inferior to radial groove

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Triceps brachii distal attachment

Proximal end of olecranon of ulna
Fascia of forearm

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Triceps brachii innervation

Radial nerve (c6,c7,c8) will keep your triceps great

23

Triceps brachii action

Extends forearm
During abduction long head resists dislocation of humerus

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Anconeus proximal attachment

Lateral epicondyle of humerus

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Anconeus distal attachment

Lateral surface of olecranon and superior part of posterior surface of ulna

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Anconeus innervation

Radial nerve (c7,c8,t1)

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Anconeus action

Assist triceps in extending forearm; stabilizes elbow joint; abducts ulna during pronation