Upper Limb 2 Flashcards
What are the muscles of the arm?
Ant: pectoralis major, coracobrachialis
Post: teres major, latissimus dorsi, deltoid muscle
What is the origin, insertion, action, innervation of the pectoralis major?
O: clavicle, sternum, costal cartilage
I: intertubecular groove
A: flexion, adduction, medial rotation
IN: Lat/Med pectoral nerves
What is the origin, insertion, action, innervation of the coracobrachialis?
O: coracoid process
I: medial humerus
A: flexion and adduction
IN: musculocutaneous nerve
What is the origin, insertion, action, innervation of the teres major?
O: dorsal surface inferior angle of scapula
I: intertubecular groove
A: extension, adduction, medial rotation
IN: lower subscapular nerve
What is the origin, insertion, action, innervation of the latissimus dorsi?
O: T6-T12, illiac crest
I: intertubecular groove
A: extension, adduction, medial rotation
IN: throacodorsal nerve
What is the origin, insertion, action, innervation of the deltoid?
O: clavicle, acromium, spine of scapula
I: deltoid tuberosity
A: ANT = flexion/medially rotate
A: MID = abduction
A: POST = extension/laterally rotate
IN: axillary nerve
What are the anterior and posterior components of the arm?
Anterior: flexors
- biceps brachii | brachialis | coracobrachialis
Posterior: extensors
- triceps
What is the origin, insertion, action, innervation of the biceps brachii?
O: coracoid process (SH), supraglenoid tubercle (LH)
I: tuberosity of radius
A: supination, flexion (shoulder/elbow)
IN: musculocutaneous nerve
What is the origin, insertion, action, innervation of the brachialis?
O: distal surface of humerus
I: coronoid process, tuberosity ulna
A: flexion
IN: musculocutaneous nerve
What is the origin, insertion, action, innervation of the triceps brachii?
O: LH = infraglenoid tubercle
O: MH = humerus under radial groove
O: LATH = humerus above radial groove
I: olecranon process
A: extension
IN: radial nerve
