Exam 1 - Arm Flashcards
What muscles do the Musculocutaneous nerve innervate?
Coracobrachialis, Biceps brachii and Brachialis.
What muscles do the Median nerve innervate?
Pronator teres, Flexor carpi radialis, Palmaris longus, Flexor pollicis longus, Flexor digitorum superficialis, Pronator quadratus, Flexor digitorum profundus (lateral 1/2 to digits 2-3), Thenar muscles and Lumbricals to digits 2-3
What nerve innervates the anterior compartment of the forearm
Median nerve and Ulnar nerve
What nerve innervates the Posterior compartment of arm?
Radial nerve
What nerve innervates the Posterior compartment of forearm?
Radial nerve
What muscles do the Radial nerve innervate?
Triceps brachii (long, lateral and short head), Brachioradialis, Extensor carpi radialis longus, Extensor carpi radialis brevis, Anconeus, Supinator, Posterior interosseous, Abductor pollicis longus, Extensor carpi ulnaris, Extensor pollicis brevis, Extensor digiti minimi, Extensor pollicis longus, Extensor indicis, Extensor digitorum
What muscles do the Ulnar nerve innervate?
Flexor carpi ulnaris and Flexor digitorum profundus (medial 1/2 to digits 4,5), Palmar interossei, Adductor pollicis, Palmaris brevis, Hypothenar muscles, Lumbricals to digits 4,5, and Dorsal interossei
What type of muscles make up the Anterior compartment of the arm?
Flexors
What type of muscles make up the Posterior compartment of the arm?
Extensors
What muscles are in the posterior compartment of arm?
Triceps brachii and Aconius
What muscles are in the anterior compartment of arm?
Biceps brachii, Brachioradialis and Coracobrachialis.
What are the origins of Biceps brachii?
Short head - tip of the coracoid process of Scapula
Long head - supraglenoid tubercle of the Scapula
“You walk shorter to a street corner. You ride longer on a superhighway.”:
· Short head originates from coracoid process.
· Long head originates from the supraglenoid cavity.
What are the insertions of Biceps brachii?
Tuberosity of the Radius
What are the functions of Biceps brachii?
Flexes the forearm, flexes arm (long head) and supinates
What innervates Biceps brachii?
Musculocutaneous nerve
What supplies blood to Biceps brachii?
Brachial artery
What are the origins of Coracobrachialis?
Coracoid process of Scapula
What are the insertions of Coracobrachialis?
Medial side of Humerus at mid-shaft
What are the functions of Coracobrachialis?
Flexes and adducts arm
What innervates Coracobrachialis?
Musculocutaneous nerve
What supplies blood to Coracobrachialis?
Brachial artery
What are the origins of Brachialis?
Anterior surface of the lower 1/2 of the Humerus
What are the insertions of Brachialis?
Coronoid process of the Ulna
What are the functions of Brachialis?
Flexes the forearm
What innervates the Brachialis?
Musculocutaneous nerve
What supplies blood to Brachialis?
Brachial artery and Radial Recurrent artery
What are the origins or Anconeus?
Lateral epicondyle of Humerus
What are the insertions of Anconeus?
Lateral side of the Olecranon and the Upper 1/4 of the UIna
What are the functions of Anconeus?
Extends the forearm
What innervates Anconeus?
Radial nerve
What supplies blood to Anconeus?
Interosseous Recurrent artery
What are the origins of Triceps brachii?
Long head - infraglenoid tubercle of the Scapula
Lateral head - Posterolateral humerus
Medial head - Posteromedial surface of the inferior 1/2 of Humerus
What are the insertions of Triceps brachii?
Olecranon process of the UIna
What are the functions of Triceps brachii?
Extends the forearm; the long head extends and adducts arm
What innervates Triceps brachii?
Radial nerve
What supplies blood to Triceps brachii?
Deep brachial (profunda brachii) artery
What is the general path of arteries in the arm?
Brachial artery and these branches - Profunda brachii artery (middle and radial collateral branches), Superior Ulnar Collateral Artery, Inferior Ulnar Collateral Artery
What are the contents of the Cubital Fossa?
Median nerve, Brachial Artery, Tendon of Biceps, Radial nerve.
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