Location. The olecranon has a beak-like structure and is bent forwards into the olecranon fossa of the humerus during extension of the elbow. It is present over the posterior surface of the elbow and forms the palpable ‘point’ of the elbow during its full extension.
What articulates with olecranon fossa?
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 difference between olecranon fossa and olecranon process?
this notch is called the olecranon process; it articulates behind the humerus in the olecranon fossa and may be felt as the point of the elbow. The projection that forms the lower border of the trochlear notch, the coronoid process, enters the coronoid fossa of the humerus when the elbow…
What is the function of the olecranon process?
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.
What is the funny bone called?
Funny you should ask. It turns out that your funny bone isn’t a bone. It’s actually a nerve — one that starts in your spine and travels from your neck, through your elbow and to your fingers (your pinky and ring fingers, to be exact). It’s called the ulnar nerve.
What is cubital fossa?
The cubital fossa is a small triangular area located on the anterior surface of the elbow, with the apex of the triangle pointing distally. It contains some important structures, on their passage from the arm to forearm. [[1] It is homologous to the popliteal fossa of the lower limb.
Which structure is olecranon fossa?
humerus. The two depressions—the olecranon fossa, behind and above the trochlea, and the coronoid fossa, in front and above—receive projections of the ulna as the elbow is alternately straightened and flexed.
Where is radial fossa of humerus?
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.
Where is glenoid fossa?
The glenoid fossa is the socket of the shoulder joint. This part of the shoulder is a ball and socket joint. The head of the Humerus fits into the Glenoid fossa, though it is a shallow socket.
Where is the greater tubercle?
The greater tuberosity it is located lateral to the head. The lesser tuberosity is located inferior to the head, on the anterior part of the humerus, Its very prominent and palpable. Bicipital (intertubercular) groove is located between the two tuberosities.
What is the medial epicondyle of the humerus?
The medial epicondyle of the humerus is an apophysis that serves as a point of attachment for the forearm flexor muscles, the pronator teres, and the medial collateral ligament (MCL).
What are the three fossa of the elbow?
There are three fat pads of the elbow, which sit between the two layers of the joint capsule, making them extrasynovial 3,4: coronoid fossa fat pad (anterior) radial fossa fat pad (anterior) olecranon fossa fat pad (posterior)
What does the coronoid fossa articulate with?
part of ulna
…of the trochlear notch, the coronoid process, enters the coronoid fossa of the humerus when the elbow is flexed. On the outer side is the radial notch, which articulates with the head of the radius. The head of the bone is elsewhere roughened for muscle attachment.
Why humerus is called humerus?
The word “humerus” is derived from Latin: humerus, umerus meaning upper arm, shoulder, and is linguistically related to Gothic ams shoulder and Greek ōmos.
Why do I laugh when I hit my funny bone?
The first, is that it’s based on the “funny feeling” you get when you hit your elbow in that not-so-sweet spot. The second, is that it’s a play on words because the ulnar nerve runs along the upper arm bone called the humerus (sounds like “humorous”) that is between your elbow and shoulder.
What is the elbow bone called?
Humerus: This long bone extends from the shoulder socket and joins the radius and ulna to form the elbow. Radius: This forearm bone runs from the elbow to the thumb side of the wrist. Ulna: This forearm bone runs from the elbow to the “pinkie” side of the wrist.
