Upper Arm Flashcards
Where are the trunks of the brachial plexus located?
Where are the anterior and posterior divisions of the brachial plexus?
Where are the lateral, medial and posterior cords of the brachial plexus?
Identify the nerves of the brachial plexus and their nerve roots
Musculocutaneous Nerve (C5-7)
Axillary (C5-6)
Median Nerve (C6-T1)
Radial Nerve (C5-T1)
Ulnar Nerve (C8-T1)
Where is the axillary artery?
In human anatomy, the axillary artery is a large blood vessel that conveys oxygenated blood to the lateral aspect of the thorax, the axilla (armpit) and the upper limb. Its origin is at the lateral margin of the first rib, before which it is called the subclavian artery.
Where is the axillary vein?
Corachobrachialis. (Location, origin, insertion, innervation and action)
Origin: Coracoid process of the scapula
Insertion: Upper one third of the frontal humerus
Action: Flexion, adduction and internal rotation
Innervation: Musculocutaneous nerve
Which structures constitute the anatomical boundries of the axilla?
Anterior: pectoralis major and minor muscles.
Posterior : scapula, subscapularis muscle, teres major muscle, and latissimus dorsi muscle.
Medial: serratus anterior, thoracic wall
Lateral wall: Intertubecrcular sulcus of the humerus
Apex: cervico-axillary canal, axillary inlet - bound by first rib, clavicle and superior edge of scapula
Base: concave skin, subcutaneous tissue and axillary fascia
What are the contents of the axilla?
Axillary artery, axillary vein, axillary lymphatic vessesl and nodes, cords and braches of the brachial plexus.
Long head of the tricep (location, origin, insertion, innervation and action)
Origin: Infraglenoid tubercle of the scapula
Insertion: Olcranon process of the ulna via the triceps brachii tendon
Action: Extension and adduction of the shoulder joint, extension at the elbow joint
Innervation: Radial nerve (C6-8)
Lateral head of the tricep (location, origin, insertion, innervation and action)
Origin: Posterolateral humerus proximal to the radial groove and the lateral intermuscular septum
Insertion: Olecranon process of the ulna via the triceps brachii tendon
Action: Extension of the elbow joint
Innervation: Radial nerve (C6-8)
Medial head of the tricep (location, origin, insertion, innervation and action)
Origin: Posteromedial surface of the distal humerus below the radial groove and the medal intermuscular septum
Insertion: Olecranon process of the ulna via the triceps brachii tendon
Action: Extension of the elbow joint to extend the forearm
Innervation: Radial nerve (C6-8)
Short head of biceps (location, origin, insertion, innervation and action)
Origin: Caracoid process of the scapula
Insertion: Radial tuberosity
Action: Flexion of the elbow joint, supination, abduction and internal rotation of the humerus
Innervation: Musculocutaneous nerve
Long head of the biceps (location, origin, insertion, innervation and action)
Origin: Supraglenoid tubercle of the scapula
Insertion: Radial tuberosity
Action: Flexion of the elbow joint; supination, abduction and internal rotation of the humerus
Innervation: Musculocutaneous nerve
Brachialis (location, origin, insertion, innervation and action)
Origin: Distal anterior surface of the humerus
Insertion: Coronoid process of the ulna
Action: Flexion of the elbow joint to flex the forearm
Innervation: Musculocutaneous nerve
Brachial artery
Profunda brachii artery
Cephalic vein
Basilic vein
Identify the landmarks on the humerus
