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Exam 6 A&P
Origin-Insertion-Action-Innervation of Arm
Question | Answer |
---|---|
Origin of Brachialis | Distal half of the anterior side of the humerus and intermuscular septa |
Insertion of Brachialis | Coronoid process and ulnar tuberosity |
Action of Brachialis | Flexion of the forearm at the elbow joint |
Innervation of Brachialis | Musculocutaneous and radial nerves |
Origin of Biceps brachii | Long head - Supraglenoid tubercle of the scapula Short head - apex of the Coracoid process of the scapula Mnemonic: 'You walk Shorter to a street Corner. You ride Longer on a Superhighway' |
Insertion of Biceps brachii | Radial tuberosity of the radius |
Action of Biceps brachii | Flexion of the forearm at the elbow joint, supinator of the forearm, accessory flexor of the arm at the glenohumeral joint |
Innervation of Biceps brachii | Musculocutaneous nerve |
Origin of Triceps brachii | Long head - infraglenoid tubercle of the scapula Medial head - posterior surface of the humerus Lateral head - posterior surface of the humerus |
Insertion of Triceps brachii | Olecranon |
Action of Triceps brachii | Extension of the forearm and elbow joint |
Innervation of Triceps brachii | Radial nerve |
mnemonics to remember arm muscles: 'Rule of 3s' | 3 in flexor compartment of arm: biceps, brachialis, coracobrachialis. |
mnemonic to remember arm muscle: 'Busy Bees CollaBorate well' | 3 in extensor compartment of arm: 3 heads of triceps (long, medial, lateral) |