Arm Flashcards
Articulation between the humerus (trochlea) and and ulna (trochlear notch).
Humeroulnar joint.
Articulation between the humerus (capitulum) and the radius (head).
Humeroradial joint.
Articulation between the radius (head) and ulna (radial notch).
Proximal radioulnar joint.
A two-headed muscle (long and short head) located superficially in the anterior compartment of the arm.
Biceps Brachii.
What is the origin of the long head of the biceps brachii?
Supraglenoid tubercle.
What is the origin of the short head of the biceps brachii?
Coracoid process.
What is the insertion of the biceps brachii?
Radial tuberosity (radius).
What are the actions of the biceps brachii?
Flexion of the glenohumeral joint/elbow and aids in supination of the radioulnar joint.
What innervates the biceps brachii?
Musculocutaneous nerve. (C5-C7).
Located deep to the biceps brachii muscle?
Brachialis.
What is the origin of brachialis?
Humeral midshaft.
What is the insertion of brachialis?
Ulna.
What is the action of brachialis?
Flexion of the glenohumeral joint/elbow.
What innervates the brachialis?
Musculocutaneous (C5-C6) and Radial (C7) nerve.
Located adjacent to the short head of the biceps brachii muscle.
Coracobrachialis.
What is the origin of the coracobrachialis?
Coracoid process.
What is the insertion of the coracobrachialis?
Humerus (midshaft).
What are the actions of the coracobrachialis?
Glenohumeral joint flexion.
What innervates the coracobrachialis?
Musculocutaneous nerve (C5-C7).
A three-headed muscle (long, lateral, and medial) located superficially in the posterior compartment of the arm.
Triceps Brachii.
What is the origin of the long head of the triceps brachii?
Infraglenoid tubercle.
What is the origin of the lateral head of the triceps brachii?
Posterior humerus.
What is the origin of the medial head of the triceps brachii?
Posterior humerus.
What is the insertion of the triceps brachii?
Olecranon process (ulna).
What is the action of the triceps brachii?
Extension of the glenohumeral joint/elbow.
What innervates the triceps brachii.
Radial nerve (C5-C7).
