Muscles of the Upper Arm Flashcards
What are the muscles of the upper arm
Biceps brachii
Brachialis
Coracobrachialis
Triceps brachii
Which muscles are in the anterior compartment of the upper arm
Biceps brachii
Brachialis
Coracobrachialis
Which muscles are in the posterior compartment of the upper arm
Triceps brachii
Which nerve innervates the muscles of the anterior compartment of the upper arm
Musculocutaneous nerve
Which artery supplies the muscles of the anterior compartment of the upper arm
Muscular branches of the brachial artery
What is the bicipital aponeurosis
Connective tissue sheet given off as the tendon of biceps brachii enters the forearm
Forms the roof of the cubital fossa
Blends with the deep fascia of the anterior forearm
Where does the long head of biceps brachii originate
Supraglenoid tubercle of the scapula
Where does the short head of biceps brachii originate
Corcaoid process of the scapula
Where does biceps brachii insert
Radial tuberosity
Fascia of the forearm via the bicipital aponeurosis
What is the function of biceps brachii
Supination of the forearm
Flexion at the elbow and the shoulder
Which never innervates biceps brachii
Musculocutaneous nerve
What does bicep tendon reflex test
Spinal cord segment C6
Where does the coracobrachialis muscle lie in relation to biceps brachii
Deep to it
Where does corachobrachialis originate
Coracoid process of the scapula
Where does corachobrachialis insert
Medial side of the humeral shaft at the level of the deltoid tubercle
What is the action of coracobrachialis
Flexion at the shoulder
Weak adduction
Which nerve innervates coracobrachialis
Musculocutaneous nerve
Where does brachialis lie
Deep to biceps brachii
What forms the floor of the cubital fossa
Brachialis
Where does brachialis originate
Medial and lateral surfaces of the humeral shaft
Where does brachialis insert
Ulna tuberosity
What is the function of brachialis
Flexion at the elbow
Which nerve innervates brachialis
Musculocutaneous nerve
Contributions from radial nerve
Which is the most common tendon to rupture in the arm
Long head of biceps
What sign does rupture of long head of biceps cause
Popeye sign
Which muscle is in the posterior compartment of the upper arm
Triceps brachii
How many heads does triceps brachii have
3
Which head of triceps lies the deepest
Medial head
Which artery supplies the posterior compartment of the arm
Profunda brachii artery
Where does long head of triceps originate
Infraglenoid tubercle
Where does lateral head of triceps originate
Humerus, superior to the radial groove
Where does the medial head of triceps originate
Humerus, inferior to the radial groove
Where does triceps brachii insert
Olecranon of the ulna
What is the function of triceps brachii
Extension at the elbow
Which nerve innervates triceps brachii
Radial nerve
What does triceps reflex test
Spinal segment C7
What is long head of triceps innervated by in some people
Axillary nerve
