Where is the ulnar notch on the radius?

Where is the ulnar notch bone located?

The upper end of the ulna presents a large C-shaped notch—the semilunar, or trochlear, notch—which articulates with the trochlea of the humerus (upper arm bone) to form the elbow joint.

Where is radial notch located?

The radial notch is found on the ULNA and articulates with the head of the radius to form a pivot joint. It is located to the lateral side of the coronoid process. The coronoid and olecranon process articulate with the humerus to form the hinge joint of the elbow.

What notch is at the distal end of the radius?

Distal Radius Fractures

The distal radius has three articular surfaces: the scaphoid facet, the lunate facet, and the sigmoid notch, which articulate with the scaphoid, lunate, and distal ulna, respectively.

What does radial notch mean?

Medical Definition of radial notch

: a narrow depression on the lateral side of the coronoid process of the ulna that articulates with the head of the radius and gives attachment to the annular ligament of the radius.

Is the ulna lateral to the radius?

It extends from the lateral side of the elbow to the thumb side of the wrist and runs parallel to the ulna. The ulna is usually slightly longer than the radius, but the radius is thicker. Therefore the radius is considered to be the larger of the two.

Radius (bone)

FMA 23463
Anatomical terms of bone

Where is mandibular notch located?

ramus of the mandible

The mandibular notch is a concave groove at the top of the ramus of the mandible. It is the gap between the coronoid process anteriorly and the condyloid process posteriorly.

Which joint do the head of the ulna and the ulnar notch of the radius form?

distal radioulnar joint

On the medial side of the distal radius is the ulnar notch of the radius. This shallow depression articulates with the head of the ulna, which together form the distal radioulnar joint.

What does the radial notch of the ulna articulate with?

Slightly inferior and lateral to the trochlear notch is the radial notch, which articulates with the head of the radius to form the proximal radioulnar joint. Located distally on the ulna, the styloid process is a pointed projection of bone that arises from the ulnar head.

What is ulna trochlear notch?

The trochlear notch (/ˈtrɒklɪər/), also known as semilunar notch and greater sigmoid cavity, is a large depression in the upper extremity of the ulna that fits the trochlea of the humerus (the bone directly above the ulna in the arm) as part of the elbow joint.

What is ulna and radius?

The radius and ulna are long bones that make up the forearm, extending from the elbow to the wrist. In the anatomical position, the radius is found in the lateral forearm, while the ulna is found in the medial forearm.

What is the function of the trochlear notch?

The articulation of the humeral trochlea and the trochlear notch of the ulna is the major facilitator of flexion and extension about the elbow. The radiocapitellar articulation supports motion in both the flexion and extension of the elbow in addition to supination and pronation of the forearm.

Which part of the distal humerus articulates with trochlear notch ulna?

Trochlea of humerus

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.

What part of the humerus articulates with the radius?


capitulum: At the distal head of the humerus, it articulates with the radius of the forearm.

Where is the radius located?


radius, in anatomy, the outer of the two bones of the forearm when viewed with the palm facing forward. All land vertebrates have this bone. In humans it is shorter than the other bone of the forearm, the ulna.

How do the radius and ulna articulate with the humerus?

The radius articulates proximally at the elbow with the capitulum of the humerus and the radial notch of the ulna. It articulates at its distal end with the ulna at the ulnar notch and with the articular surfaces of the scaphoid and lunate carpal bones.

How do you find the radius and ulna?

The radius and the ulna are long, slightly curved bones that lie parallel from the elbow, where they articulate with the humerus, to the wrist, where they articulate with the carpals. The radius is located laterally, near the thumb, and the ulna medially, near the little finger.

How do you do the ulna side radius?

Position the radius is the lateral bone okay and the radius is also a little bit shorter okay so this right here this bone on the left side here as we see this is actually the radius.

Does your radius and ulna twist?

The ulna is one of the two forearm bones and is on the small finger side of the forearm. Unlike the radius, this bone does not twist, so when the hand changes position, the ulna is always in the same position on the inside part of the forearm. Like the radius, the ulna has joints at the elbow and wrist.

How do you find the radius of a side?

To determine the side of radius, the following points should be noted:

  1. The upper hand has a disc like head , whereas lower end is expanded.
  2. Medial border is the sharpest and presents radial tuberosity at the upper end.
  3. Posterior surface at the lower end presents a tubercle called tubercle of Lister.