Arm Flashcards
3 flexor muscles of the arm
biceps brachii
brachialis
coracobrachialis
Nerve innervating flexor muscles
Musculocutaneous
Biceps Brachii origin
Long Head:
supraglenoid tubercle of scapula
Short Head:
Coracoid process of scapula
Biceps Brachii insertion
- Radial tuberocity
- via bicipital aponeurosis into deep facia of the forearm
both long and short head
Biceps Brachii action
supination forearm
flexion of elbow
stability of shoulder joint
Biceps Brachii innervation
musculocutaneous nerve
long head of Biceps Brachii travels
through intertubercular grove
- long thin tendon
- lateral to short head
Brachialis origin
lower half of the anterior surface of the humerus
Brachialis insertion
Coranoid process of the ulna
Brachialis action
flexion at the elbow (pronated flexion)
Brachialis innervation
musculocutaneous nerve
Coracobrachialis origin
tip of the Coracoid Process
Coracobrachialis insertion
Middle of medial aspect of humerus
Coracobrachialis action
flexion at shoulder
adduction of humerus
Coracobrachialis innervation
Musculocutaneous Nerve
Posterior component of the arm
Tricep Brachii
Nerve innervating extensor muscles
Radial Nerve
Landmark where radial nerve travels
Travels down radial grove on the posterior surface of the humerus
Tricep Brachii insertion
COMMON TENDON
- into olecranon process of ulna
Tricep Brachii long head origin
infraglenoid tubercle of the scapula
Tricep Brachii long head action
- Extension and addition of the shoulder joint
- Extension elbow
Tricep Brachii lateral head origin
Posterior humerus ABOVE radial grove (mid humerus)
Tricep Brachii lateral head action
Extension of elbow
Tricep Brachii medial head origin
posterior humerus BELOW radial grove
Tricep brachii medial head action
extension of elbow
Tricep arterial supply
Deep brachial artery
Bicep Brachii arterial supply
Brachial Artery
