To what does the olecranon fossa of the humerus articulate? The olecranon fossa of the humerus articulates with the olecranon process of the ulna .
What bone articulates with the olecranon fossa of the humerus?
On the posterior surface of the condyle is the olecranon fossa, which articulates with the olecranon of the ulnar bone upon flexion of the elbow joint.
What is the olecranon fossa 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.
What bony landmark of the humerus articulates with the olecranon?
Trochlear notch – formed by the olecranon and coronoid process. It is wrench shaped, and articulates with the trochlea of the humerus. Radial notch – located on the lateral surface of the trochlear notch, this area articulates with the head of the radius.
Which of the following bones does not articulate with the humerus?
The hyoid bone does not articulate with any other bone at all, it is held in place by cartilage.
What bone has 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.
Is the olecranon fossa on the anterior or posterior side of the humerus?
The olecranon fossa is located on the posterior surface of the distal humerus , where it receives the proximal ulna during full extension of the arm.
Where do most fractures occur on the humerus?
The most frequently fractured site of the humerus especially in elderly is the surgical neck which is an area of constriction distal to the tuberosities. The deforming forces relevant to PHFs include: pectoralis major: displaces humeral shaft anterior/medial.
What muscles attach to the olecranon process?
The olecranon is a bony prominence of the ulna that represents that bone’s most proximal posterior surface at the elbow. While the olecranon is an attachment site for several muscle groups including the flexor carpi ulnaris and anconeus, the major muscle attachment is that of the triceps .
What is the most distal feature of the humerus?
The distal end of the humerus has two articulation areas , which join the ulna and radius bones of the forearm to form the elbow joint. The more medial of these areas is the trochlea, a spindle- or pulley-shaped region (trochlea = “pulley”), which articulates with the ulna bone.
What muscles are attached to the humerus?
The pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles connect to the humerus and move the arm. The muscles that move the forearm are located along the humerus, which include the triceps brachii, biceps brachii, brachialis, and brachioradialis.
What muscles insert on the humerus?
- Anteriorly – coracobrachialis, deltoid, brachialis, brachioradialis.
- Posteriorly – medial and lateral heads of the triceps (the spiral groove demarcates their respective origins).
Which bone is not considered to be part of the cranium?
Which bone is NOT considered to be part of the cranium? lacrimal bone [The lacrimal bone is a tiny bone found in the medial portion of the orbit. It is a facial bone, not part of the cranium.]
What bones does the humerus articulate with?
Humerus, long bone of the upper limb or forelimb of land vertebrates that forms the shoulder joint above, where it articulates with a lateral depression of the shoulder blade (glenoid cavity of scapula), and the elbow joint below, where it articulates with projections of the ulna and the radius.
What is the main function of the carpal bones?
The carpal bones allow the wrist to move and rotate vertically .
Does a bone chip need to be removed?
Your doctor may prescribe an anti-inflammatory medication. Small bone chips that do not affect elbow motion and do not cause further pain do not need to be removed. Surgery may be needed to remove a large bone chip .
