Radial fossa

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Radial fossa
Gray207.png
Left humerus. Anterior view. (Radial fossa visible at bottom right.)
Details
Identifiers
Latin fossa radialis humeri
TA98 A02.4.04.026
TA2 1206
FMA 23452
Anatomical terms of bone

The radial fossa is a slight depression found on the humerus above the front part of the capitulum. It receives the anterior border of the head of the radius when the forearm is flexed.

Contents

Structure

The joint capsule of the elbow attaches to the humerus just proximal to the radial fossa. [1] [2]

Additional images

Radial Fossa Radial-Fossa.jpg
Radial Fossa

Related Research Articles

Arm Proximal part of the free upper limb between the shoulder and the elbow

In human anatomy, the arm is the part of the upper limb between the glenohumeral joint and the elbow joint. In common usage, the arm extends through the hand. It can be divided into the upper arm, which extends from the shoulder to the elbow, the forearm which extends from the elbow to the hand, and the hand. Anatomically the shoulder girdle with bones and corresponding muscles is by definition a part of the arm. The Latin term brachium may refer to either the arm as a whole or to the upper arm on its own.

Humerus Long bone of the upper arm

The humerus is a long bone in the arm that runs from the shoulder to the elbow. It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes. The body is cylindrical in its upper portion, and more prismatic below. The lower extremity consists of 2 epicondyles, 2 processes, and 3 fossae. As well as its true anatomical neck, the constriction below the greater and lesser tubercles of the humerus is referred to as its surgical neck due to its tendency to fracture, thus often becoming the focus of surgeons.

Brachioradialis

The brachioradialis is a muscle of the forearm that flexes the forearm at the elbow. It is also capable of both pronation and supination, depending on the position of the forearm. It is attached to the distal styloid process of the radius by way of the brachioradialis tendon, and to the lateral supracondylar ridge of the humerus.

Radial nerve

The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb. It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.

Brachial artery Large blood vessel

The brachial artery is the major blood vessel of the (upper) arm. It is the continuation of the axillary artery beyond the lower margin of teres major muscle. It continues down the ventral surface of the arm until it reaches the cubital fossa at the elbow. It then divides into the radial and ulnar arteries which run down the forearm. In some individuals, the bifurcation occurs much earlier and the ulnar and radial arteries extend through the upper arm. The pulse of the brachial artery is palpable on the anterior aspect of the elbow, medial to the tendon of the biceps, and, with the use of a stethoscope and sphygmomanometer often used to measure the blood pressure.

Median nerve Nerve of the upper limb

The median nerve is a nerve in humans and other animals in the upper limb. It is one of the five main nerves originating from the brachial plexus.

Ulnar nerve

In human anatomy, the ulnar nerve is a nerve that runs near the ulna bone. The ulnar collateral ligament of elbow joint is in relation with the ulnar nerve. The nerve is the largest in the human body unprotected by muscle or bone, so injury is common. This nerve is directly connected to the little finger, and the adjacent half of the ring finger, innervating the palmar aspect of these fingers, including both front and back of the tips, perhaps as far back as the fingernail beds.

Cubital fossa

The cubital fossa,chelidon, or elbow pit is the triangular area on the anterior view of the elbow of a human or other hominid animal. It lies anteriorly to the elbow when in standard anatomical position.

Olecranon

The olecranon, from the Greekolene meaning elbow and kranon meaning head, is a large, thick, curved bony eminence of the ulna, a long bone in the forearm that projects behind the elbow. It forms the most pointed portion of the elbow and is opposite to the cubital fossa or elbow pit. The olecranon serves as a lever for the extensor muscles that straighten the elbow joint.

Supraclavicular nerves

The supraclavicular nerves arise from the third and fourth cervical nerves. They emerge beneath the posterior border of the sternocleidomastoideus, and descend in the posterior triangle of the neck beneath the platysma muscle and the deep cervical fascia. Together, they innervate skin over the shoulder. The supraclavicular nerve can be blocked during shoulder surgery.

Trochlea of humerus Articular surface of the elbow joint which articulates with the trochlear notch of the ulna

In the human arm, the humeral trochlea is the medial portion of the articular surface of the elbow joint which articulates with the trochlear notch on the ulna in the forearm.

Medial epicondyle of the humerus A rounded eminence on the medial side of the humerus

The medial epicondyle of the humerus is an epicondyle of the humerus bone of the upper arm in humans. It is larger and more prominent than the lateral epicondyle and is directed slightly more posteriorly in the anatomical position. In birds, where the arm is somewhat rotated compared to other tetrapods, it is called the ventral epicondyle of the humerus. In comparative anatomy, the more neutral term entepicondyle is used.

Olecranon fossa A deep triangular depression on the posterior end of the humerus

The olecranon fossa is a deep triangular depression on the posterior side of the humerus, superior to the trochlea. It provides space for the olecranon of the ulna during extension of the forearm.

Radial tuberosity

Beneath the neck of the radius, on the medial side, is an eminence, the radial tuberosity; its surface is divided into:

Radial collateral ligament of elbow joint Ligament of elbow

The radial collateral ligament (RCL), lateral collateral ligament (LCL), or external lateral ligament is a ligament in the elbow on the side of the radius.

Glenoid labrum

The glenoid labrum is a fibrocartilaginous structure rim attached around the margin of the glenoid cavity in the shoulder blade. The shoulder joint is considered a ball and socket joint. However, in bony terms the 'socket' is quite shallow and small, covering at most only a third of the 'ball'. The socket is deepened by the glenoid labrum, stabilizing the shoulder joint.

The coronoid process of the ulna is a triangular process projecting forward from the anterior proximal portion of the ulna.

Coronoid fossa of the humerus Anatomical feature

Superior to the anterior portion of the trochlea is a small depression, the coronoid fossa, which receives the coronoid process of the ulna during flexion of the forearm. It is directly adjacent to the radial fossa of the humerus.

Head of radius A bone of the arm

The head of the radius has a cylindrical form, and on its upper surface is a shallow cup or fovea for articulation with the capitulum of the humerus. The circumference of the head is smooth; it is broad medially where it articulates with the radial notch of the ulna, narrow in the rest of its extent, which is embraced by the annular ligament.

Elbow Joint between the upper and lower parts of the arm

The elbow is the visible joint between the upper and lower parts of the arm. It includes prominent landmarks such as the olecranon, the elbow pit, the lateral and medial epicondyles, and the elbow joint. The elbow joint is the synovial hinge joint between the humerus in the upper arm and the radius and ulna in the forearm which allows the forearm and hand to be moved towards and away from the body.

References

This article incorporates text in the public domain from page 212 of the 20th edition of Gray's Anatomy (1918)

  1. Greiwe, R. M. (2016-01-01), Greiwe, R. Michael (ed.), "4 - Distal humerus fractures: Open reduction and internal fixation", Shoulder and Elbow Trauma and its Complications, Woodhead Publishing Series in Biomaterials, Woodhead Publishing, pp. 65–97, ISBN   978-1-78242-450-5 , retrieved 2021-01-08
  2. Jacob, S. (2008-01-01), Jacob, S. (ed.), "Chapter 2 - Upper Limb", Human Anatomy, Churchill Livingstone, pp. 5–49, ISBN   978-0-443-10373-5 , retrieved 2021-01-08