Coronoid fossa of humerus. Humerus 3d Anatomy 2022-10-19
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The coronoid fossa is a small depression located on the anterior (front) aspect of the humerus, a long bone in the upper arm. It is named after the coronoid process of the ulna, which is a bony projection located in the forearm. The coronoid process fits into the coronoid fossa when the arm is flexed at the elbow joint.
The primary function of the coronoid fossa is to provide a surface for the coronoid process to articulate with when the arm is flexed. This allows for a smooth and stable movement at the elbow joint, which is essential for activities such as lifting, pushing, and pulling.
The coronoid fossa is also important for the stability of the elbow joint. When the arm is extended, the coronoid process fits snugly into the coronoid fossa, providing a strong connection between the humerus and the ulna. This helps to prevent the elbow from dislocating or moving out of place.
In addition to its role in elbow joint function, the coronoid fossa also serves as an attachment point for several muscles and ligaments. The brachialis muscle, which is responsible for flexing the elbow, inserts into the coronoid process and the adjacent area of the humerus. The ulnar collateral ligament, which helps to stabilize the elbow joint, also attaches to the coronoid fossa.
Overall, the coronoid fossa is a small but important structure that plays a crucial role in the function of the elbow joint. Its unique shape and location allow for smooth and stable movement at the elbow, and it provides attachment points for important muscles and ligaments that help to support and stabilize the joint.
Humerus 3d Anatomy
How do you palpate humeral Epicondyles? It receives the anterior border of the head of the radius when the forearm is flexed. This angle is known as the carrying angle and is more prominent in women than in men. The latter are of two types, tubular and ligulate. The Bicipital Sulcus The intertubercular groove or also known as the bicipital sulcus is a deep groove that begins between the two tubercles and extends longitudinally down the proximal shaft of the humerus. Moreover, just inferior to the coronoid fossa, the capitulum and the trochlea can be identified which promote articulation with the radius and the ulna. Page was generated in 0. Just above these bony areas are two small depressions.
The coronoid fossa is located superior to the trochlea and accommodates the coronoid process of the ulna and superior to the capitulum on the anterior surface of the condyle, which is the radial fossa which receives with the head of the radius, both upon flexion of the elbow joint. Lateral Epicondyle The lateral epicondyle is the non-articular lateral bulge of bone located superior and lateral to the capitulum. It has a base, apex and four surfaces. The bump on the outer side of the elbow is called the lateral epicondyle. Kenhub does not provide medical advice. The health care provider touches and feels your body to examine the size, consistency, texture, location, and tenderness of an organ or body part.
Why coronoid fossa of humerus? Explained by FAQ Blog
Consequently, during full elbow flexion, the hand tends to rest outside the shoulder. What portion of the radius articulates with the capitulum of the humerus? These spaces accommodate the forearm bones when the elbow is fully bent flexed. The most common cause of this fracture in these age groups is aÂ fall onto the acromion of the shoulder. The Lesser Tubercle The lesser tubercle is smaller, anterolaterally placed to the head of the humerus. Our experts have done a research to get accurate and detailed answers for you.
This is where the lateral head of triceps brachii is attached. Anatomy of the Elbow. Intertubercular sulcus Synonyms: Bicipital groove The intertubercular sulcus is an indentation located between the two tubercles. The larger projection is called the olecranon. The lateral border begins just distal to the greater tubercle of the humerus. Crest for triceps brachii The posterorsuperior part of the shaft has a crest, beginning just below the surgical neck of the humerus and extends till the superior tip of the deltoid tuberosity. Fracture of the capitellum is an intra-articular fracture of the elbow, analogous to the Hoffa fracture of the knee.
The head of the radius articulates with the capitulum of the humerus AND the radial notch of the ulna. Is the capitulum medial or lateral? Anatomical neck The anatomical neck is a slight narrowing below the articular surface of the head. The radial notch is a narrow, oblong, articular depression on the lateral side of the coronoid process; it receives the circumferential articular surface of the head of the radius. The florets are arranged in a centripetal fashion, e. It articulates with the head of the radius.
Spiral fracture A fall onto the outstretched hand can also cause a spiral fracture of the shaft of the humerus. Medial supracondylar crest This forms the sharp medial border of the distal humerus continuing superiorly from the medial epicondyle. Is the capitulum part of the ulna? Kenhub does not provide medical advice. The transverse ligament of the shoulder also attaches on its lateral part. The nutrient arteries enter the humerus through this foramen. Above the lateral supracondylar ridge, it is ill-defined nevertheless traceable to the posterior part of the greater tubercle.
Test your knowledge with our Surfaces The anterolateral surfaceÂ is an area limited between the anterior and lateral borders. It supplies connection to subscapularis muscle. Fractures Locations Fractures of the humerus are relatively common and can occur at any location on the humerus. It is the trochlea of the humerus which sits in the semi-lunar notch of the ulna to form this joint. The inflorescence is surrounded by one or more whorls of bracts called involucre. The elbow also may be stiff, swollen, and hurt to touch.
The proximal endÂ of the anterior border is continuous with theÂ lateral lip of the intertubercular sulcus. How do you fix a coronoid process? 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. ItÂ thickens distally to form the lateral supracondylar ridge. The shaft also contains three surfaces referred to as the anterolateral, anteromedial and posterior surfaces. The greater tubercle is where supraspinatus, infraspinatus and teres minor muscles are attached. Learn about this topic in these articles: humerus. It consists of three borders known as the anterior, lateral and medial borders.