What is the elbow?
A: The elbow is the region between the arm and the forearm that surrounds the elbow joint.
The term elbow is specifically used for humans and
other primates; in other vertebrates what term is used?
A: Forelimb plus joint.
The elbow joint has three different portions surrounded
A: A common joint capsule.
These are joints between what?
A: The three bones of the elbow.
What are the three bones of the elbow?
A: The humerus of the upper arm, and the radius and the ulna of the forearm.
When in anatomical position there are how many main
bony landmarks of the elbow?
The elbow joint and the superior radioulnar joint are
enclosed by what?
A: A single fibrous capsule.
The capsule is strengthened by ligaments at the sides
but is what?
A: Relatively weak in front and behind.
The elbow, like other joints, has what on either side?
These are triangular bands which blend with what?
A: The joint capsule.
How many main flexor muscles are there at the elbow?
A: There are three.
Brachialis acts exclusively as an elbow flexor and is
one of the few muscles in the human body with what?
A: A single function.
Brachialis is the main muscle used when the elbow is
The arteries supplying the joint are derived from an
extensive circulatory anastomosis between what?
A: The brachial artery and its terminal branches.
The function of the elbow joint is to do what?
A: Extend and flex the arm grasp and reach for objects.
The range of movement in the elbow is from 0 degrees of
elbow extension to how many degrees of elbow flexion?
A: 150 degrees.
When the arm is extended, with the palm facing forward
or up, the bones of the upper arm (humerus) and forearm (radius and ulna)
A: Not perfectly aligned.
The deviation from a straight line occurs in the
direction of what?
A: The thumb.
The deviation is referred to as what?
A: The "carrying angle"
The carrying angle permits the arm to be swung without
A: Contacting the hips.
Patients who are able to fully extend their arm at the
elbow are unlikely to have what?
A: A fracture (98% certainty).
Acute fractures may not be easily visible on what?
Among injuries to the upper extremity, dislocation of
the elbow is second only to what?
A: A dislocated shoulder.
A full dislocation of the elbow will require expert
medical attention to re-align, and recovery can take how long?
A: Approximately 8–14 weeks.