Anterior and Posterior Components of the Arm Flashcards
What goes in the radial (spiral) groove of the humerus?
- Radial Nerve
2. Profunda Brachii Artery
What parts of the Lower Humerus are involved in the elbow joint?
- Trochlea
- Capitulum
- Coronoid Fossa
- Medial Epicondyle
- Lateral Epicondyle
- Olecranon Fossa
What parts of the Ulna are involved the elbow joint?
- Olecranon Process
2. Coronoid Process
What are the hinge joints of the elbow joint?
- Ulnohumeral Joint
2. Radiohumeral Joint
What movements do the hinge joints in the elbow permit?
Flexion and Extension
What are the pivot joints in the elbow joint?
Superior/Proximal Radioulnar joint
What movements does the pivot joint in the elbow permit?
Pronation and Supination
What are the Ligaments in the elbow joint?
- Anular Ligamnet
- Ulnar Collateral Ligament
- Radial Collateral Ligament
What is the shape of the angular ligament and what is its function?
- Donut Shape
- Keeps the head of the radius against the ulna
- Allows for pronation and supination
What is the structure of the Ulnar Collateral Ligament and its function?
3 Bands: Inferior, Anterior, Posterior
Function: Stabilise the ulna and keep it close to the humerus
What Muscles are in the Anterior Compartment of the arm?
The Flexors:
- Biceps Brachii
- Brachialis
- Coracobrachialis
- Brachioradialis
What are the origins of Biceps Brachii?
- Coracoid process of Scapula
2. Supraglenoid tubercle of Scapula
Where does the Biceps Brachii Attach?
- Radial Tuberosity
2. Becomes the Bicipital Aponeurosis
What is the nerve supply to the Biceps Brachii?
Musculocutaneous Nerve
What are the origins of Brachialis?
Lower half of the Humerus
Where does the Brachialis Attach?
Ulnar Tuberosity