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Elbow Joint Paul

Elbow Joint 147-152

QuestionAnswer
What are the articulations of the elbow joint? The articulations of the humerus with the ulna and radius.
What parts of the humerus articulate with the ulna and radius? On the humerus, the trochlea articulates with the trochlear notch of the ulna, and the capitulum articulates with the head of the radius.
Describe the elbow joint type, and the type of movement of the joint, and range of motion. The elbow is a uniaxial joint that allows for only Flexion and extension. The joint has approximately 145 degrees of flexion.
Is there hyperextension in the elbow, and why or why not? No, this motion is blocked by the olicranon process. Any laxity is only due to loose ligaments.
What is the name of the articulation that allows for pronation and supination? What type of joint is this? The articulation between the radius and the ulna is known as the radioulnar joint. The articulation is both proximal and distal to the elbow, i.e., the superior and inferior radioulnar joint. A uniaxial joint (one type of motion)
What is the range of supination and pronation? What bone moves around the other? Measured from midpoint (neutral position) the range is 90 degrees of supination and 80 degrees of pronation. The radius moves on the ulna (the ulna is locked by the olecranon process).
What is the Carrying Angle for male and female? The longitudinal axes of the humerus and forearm for the angle, which is approx. 5 deg. for men and 10-15 for women.
What are the end feels for elbow flexion, extension, pronation and supination? Flexion - Soft tissue approximation (firm). Extension - hard (bony). Pronation - hard (bony). Supination - Soft tissue stretch (firm).
What are the attachment origin points of the bicep (both heads) and the insertion point? Long and short head origin - Supraglenoid Tubercle and Coracoid Process of the Scapula. Insertion on the Radial tuberosity (medial side of proximal radius)
Name the location where the long head of triceps attaches to the Scapula. Infraglenoid Tubercle (just below the inferior lip of the glenoid fossa.
What are the Trochlea and Capitulum, which is Medial/Lateral, and what do they articulate with? They are at the distal end of the humerus. The Trochlea is medial and articulates with the ulna, and the Capitulum is Lateral, and articulates with the radius.
Where are the Medial and Lateral Epicondyles. What type of elbow muscle attach to each Epicondyle? Which epicondyle is more prominent? Medial Epicondyle - pronator (teres). Lateral Epicondyle - (Supinator and Anconeus).
When the elbow is extended, what prominent point locks the elbow, and what is the name of the articulation in which this point locks? During full extension, the Olecranon Process of the ulna locks into the Olecranon Fossa of the humerus.
The Brachioradialis muscle attaches (originates) to what point above the lateral epicondyle? The Lateral Supracondylar Ridge.
What part of the Ulna articulates with the Trochlea of the humerus? The Trochlear Notch.
The name of the location on the proximal Ulna where the Radial head pivots during supination and pronation. The Radial Notch. This is located just distal to the Trochlear Notch.
Where is the Styloid Process located in the distal forearm. There are actually two styloid processes of the lower forearm on the medial and lateral outer surfaces of the ulna and radius.
What are the three ligaments of the elbow, their shape (if mentioned in text), and their attachments? The Med./Lat. Collateral Lig (triangular) and the Annular Lig. Medial- Med. Epicondyle to Coronoid Pro and Olecranon Pro of Ulna. Lateral-Lat. Epicondyle to the Annular Lig. and Lat. Side of Ulna. Annular Lig - Anterior/Posterior of Radial Notch of Ulna.
What is the Interosseous Membrane? It is a broad, flat membrane located between the radius and the ulna for most of their length. It holds the radioulnar articulation together and provides additional surface area for forearm/wrist muscles.
What can be palpated in the Cubital Fossa? The brachial pulse.
Created by: pbryant2019
 

 



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