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Elbow Muscle
Biceps Brachii, Brachialis, Brachioradialis, Triceps Brachii, Anconeus
| Question | Answer |
|---|---|
| Which muscle is called the "corkscrew" muscle? | Biceps Brachii |
| Which muscle has a tendon of the long head that passes within the intertubercle groove of the humerus and also through the capsule of the shoulder joint itself? | Biceps Brachii |
| Which muscle may have a an additional head attaching to the midshaft of the humerus (approximately 10% of cadavers) | Bicep Brachii |
| What are the origins of the Biceps Brachii? | supraglenoid tubercle of the scapula (long head) coracoid process of the scapula (short head) |
| What are the insertions of the Biceps Brachii? | radial tuberosity bicipital aponeurosis |
| What are the actions of the Biceps Brachii? | flexes the elbow supinates the forearm flexes the shoulder |
| What is the nerve for Biceps Brachii? | Musculocutaneous nerve. |
| Which muscle is the most effective arm flexor? | Brachialis |
| Which muscle pushes the biceps brachii up in arm flexion from underneath to make the biceps look bigger? | Brachialis |
| What is the origin of the Brachialis? | distal anterior humeral shaft |
| What is the insertions of the Brachialis? | ulnar tuberosity coracoid process of the ulna |
| What is the action of the Brachialis? | flexes the elbow |
| What is the nerve for the Brachialis? | Musculocutaneous nerve. |
| Which muscle can be palpated on the radial side of your forearm that appears to bulge? | Brachioradialis |
| Between which two tendons is the radial pulse located near the wrist? | Brachioradialis Flexor Carpi Radialis |
| What is the origin of Brachioradialis? | lateral supracondylar ridge of the humerus |
| What is the insertion of the Brachioradialis? | styloid process of the radius |
| What is the action of Brachioradialis? | flexes the elbow |
| what is the nerve of Brachioradialis? | radial nerve |
| Which two muscles are called the "Boxer's Muscle" because they deliver the straight arm knock out punch? | Serratus Anterior Triceps Brachii |
| Between which muscle's lateral and medial head dose the radial nerve sit virtually on the humerus, thus compression of this area can cause injury to the radial nerve? | Triceps Brachii |
| What are the origins of the Triceps Brachii? | infraglenoid tubercle of the scapula (long head) posterior proximal humeral shaft (lateral head) posterior distal humeral shaft (medial head) |
| What is the insertion of the Triceps Brachii? | Olecranon process |
| What are the actions of the Triceps Brachii? | extends the elbow extends the shoulder adducts the shoulder |
| What is the nerve for the Triceps Brachii? | radial nerve |
| What is the origin of the Anconeus? | lateral epicondyle of the humerus |
| What are the insertions of Anconeus? | olecranon process superior eight (1/8) of the ulnar shaft |
| What is the action of the Anconeus? | extends elbow |
| What is the nerve for Anconeus? | Radial nerve |
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