The Arm Flashcards
Anterior Flexors of the Arm and their Innervation
Biceps brachii
Brachialis
Coracobrachialis
Innervated by musculocutaneous nerve
Posterior Extensor of the Arm and its Innervation
Triceps brachii
Innervated by radial nerve
Proximal Attachments of Biceps Brachii
Short head: Tip of coracoid process of scapula
Long head: supraglenoid tubercle of scapula
Held in place by transverse humeral ligament
Distal Attachments of Biceps Brachii
Tuberosity of radius and fascia of forearm via bicipital aponeurosis
Biceps Action
Flexion (when supinated)
Supination
Brachialis Action
Flexion of the forearm
Brachialis Distal Attachment
Coronoid process and tuberosity of ulna
Brachialis Proximal Attachment
Distal half of anterior surface of humerus
Coracobrachialis Action
Flexes arm
Adducts the arm
Stabilizes the glenohumeral joint
Coracobrachialis Proximal Attachment
Tip of coracoid process of scapula
Coracobrachialis Distal Attachment
Middle third of medial surface of humerus
Triceps Brachii Proximal Attachment
Long Head: Infraglenoid tubercle of scapula
Lateral Head: Posterior surface of humerus, superior to radial groove
Medial Head: Posterior surface of humerus, inferior to radial groove
Triceps Brachii Distal Attachment
Proximal end of olecranon of ulna and fascia of forearm
Anconeus Proximal Attachment
Lateral epicondyle of humerus
Anconeus Distal Attachment
Lateral surface of olecranon and superior part of posterior surface of ulna
Anconeus Action
Assists triceps in extension of forearm
Stabilizes elbow joint
What nerve accompanies the brachial artery?
The median nerve
Branches of the Brachial Artery
Profunda brachii (posterior to humerus)
Superior ulnar collateral artery
Inferior ulnar collateral artery
Humeral nutrient artery
The profunda brachii is accompanied by which nerve?
Radial nerve
The profunda brachii ends and divides into the _______ and _______
Middle and radial collateral arteries
The musculocutaneous nerve emerges lateral to the biceps and becomes the ______
Lateral cutaneous nerve of the forearm
Anterior to the lateral epicondyle, the radial nerve divides into ______ and ______
The deep branch of the radial nerve and the superficial branch of the radial nerve
The deep branch of the radial nerve is entirely _______, while the superficial branch is entirely _______.
The deep branch is entirely MUSCULAR and ARTICULAR, while the superficial branch is entirely CUTANEOUS
