What is the function of the medial epicondyle of humerus?
The medial epicondyle protects the ulnar nerve, which runs in a groove on the back of this epicondyle. The ulnar nerve is vulnerable because it passes close to the surface along the back of the bone. Striking the medial epicondyle causes a tingling sensation in the ulnar nerve.
What does the medial epicondyle of the humerus articulate with?
It articulates with the radius and ulna bones of the forearm to form the elbow joint. Distally, the humerus becomes flattened. The prominent bony projection on the medial side is the medial epicondyle of the humerus.
What is the function of the lateral epicondyle?
Lateral epicondylitis, or tennis elbow, involves the muscles and tendons of your forearm that are responsible for the extension of your wrist and fingers.
What articulates with the lateral epicondyle of the humerus?
It articulates with both the ulna and radius and consists of a medial trochlea and a lateral capitulum, which are separated by a faint groove. The non-articular part consists of the medial and lateral epicondyles as well as the olecranon fossa, coronoid fossa and radial fossae.
What attaches at lateral epicondyle?
Description. The lateral epicondyle is a small, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow-joint, and to a tendon common to the origin of the Supinator and some of the Extensor muscles.
Where is the lateral epicondyle?
The elbow joint is made up of the bone in the upper arm (the humerus) and one of the bones in the lower arm (ulna). The bony prominences, or bumps, at the bottom of the humerus are called the epicondyles. The bump on the outer side of the elbow is called the lateral epicondyle.
What is the lateral part of the humerus?
capitulum
The lateral portion of this surface consists of a smooth, rounded eminence, named the capitulum of the humerus; it articulates with the cup-shaped depression on the head of the radius, and is limited to the front and lower part of the bone.
What is the medial epicondyle also known as?
Medial epicondylitis is also known as golfer’s elbow, baseball elbow, suitcase elbow, or forehand tennis elbow. It’s characterized by pain from the elbow to the wrist on the inside (medial side) of the elbow. The pain is caused by damage to the tendons that bend the wrist toward the palm.
Where is the medial epicondyle of the elbow?
A bony bump, called the medial epicondyle, is located along the inside of the elbow. Pain occurs on or near this bump, where the tendons of your forearm muscles connect to the bone.
What attaches to the olecranon process and the lateral epicondyle of the humerus?
extensor carpi ulnaris: This muscle arises from the lateral epicondyle of the humerus and the olecranon and is inserted into the base of the fifth metacarpal bone.
What articulates with the humerus?
The humerus is the largest bone of the upper extremity and defines the human brachium (arm). It articulates proximally with the glenoid via the glenohumeral (GH) joint and distally with the radius and ulna at the elbow joint.
Which of the following nerves passes near the medial epicondyle of the humerus?
The ulnar nerve
The ulnar nerve normally runs in the groove formed by the medial epicondyle of the humerus and the olecranon process of the ulna.
Which of the following muscles attach to the lateral epicondyle of the humerus quizlet?
The common flexor tendon attaches to the lateral epicondyle of the humerus. The thumb receives a tendon from the flexor digitorum superficialis and profundus muscles.
What is the epicondyle of humerus?
Is the head of the humerus medial or lateral?
Proximal Landmarks The upper end of the humerus consists of the head. This faces medially, upwards and backwards and is separated from the greater and lesser tuberosities by the anatomical neck. The greater tuberosity is located laterally on the humerus and has anterior and posterior surfaces.
What is the difference between medial and lateral epicondylitis?
Tennis elbow or lateral epicondylitis affects the outer or lateral side of your elbow. These are the muscles you use to bend your wrist backward and straighten your fingers. Golfer’s elbow or medial epicondylitis affects the inner or medial side of your elbow.
What is the function of the olecranon process?
The olecranon is the part of the ulna that cups the lower end of the humerus, creating a hinge for elbow movement.
What does the olecranon process articulate with?
The olecranon articulates with the humerus via the olecranon fossa on the humerus, which is situated over the posterior surface of the humerus. It is continuous with the coronoid process of the ulna via the trochlear or semilunar notch anteriorly. This forms the attachment site for the humerus over the ulnar surface.
What is lateral to the humerus?
The lateral epicondyle of the humerus is a large, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow joint, and to a tendon common to the origin of the supinator and some of the extensor muscles.
What are the Epicondyles?
An epicondyle is a special feature found on long bones. It serves as a point of attachment for tendons and ligaments. Tendons connect muscle to bone while ligaments connect bones to other bones. As with all bones, an epicondyle has the possibility of breaking.