Kines-The Elbow/Forearm Flashcards
What comprises the elbow joint?
Bones- Humerus, Radius, Ulna Joints- Proximal Radioulnar Joint Distal Radioulnar Joint Ligaments- Medial Collateral Ligament, Lateral Collateral Ligament, Annular Collateral Ligament Joint Capsule
What type of joint is the elbow joint?
uniaxial hinge joint
What motions occur at the elbow joint?
flexion and extension
What are the bony landmarks of the humerus?
Head, neck, shaft, greater and lesser tubercles, deltoid tuberosity, bicipital groove, trochlea, capitulum, medial and lateral epicondyles, lateral supracondylar ridge, olecranon fossa
What are the bony landmarks of the ulna?
Olecranon process, trochlear notch, coranoid process, radial notch, ulnar tuberosity, styloid process.
What are the bony landmarks of the radius?
head, radial tuberosity, styloid process
What are the articulations of the elbow joint?
The articulation of the humerus with the ulna and radius.
On the humerus- the trochlea articulates with the trochlear notch of the ulna
the capitulum articulates with the head of the radius.
What are the articulations of the radioulnar joint?
The articulation between the radius and ulna is known as the radioulnar joint. They articulate with each other at both ends.
At the proximal end- the head of the radius pivots within the radial notch of the ulna forming the proximal radioulnar joint.
At the distal end- the ulnar notch of the radius rotates around the head of the ulna and forms the distal radioulnar joint.
They are considered together as one joint.
What type of joint is the radioulnar joint?
unaxial pivot joint
What motions occur at the radioulnar joint?
Pronation and Supination
What is the carrying angle of the elbow?
In the anatomical position, the longitudinal axes of the humerus and forearm form this angle.
What is cubitus varus?
deformity of the elbow in which it deviates toward the midline of the body when extended.
What is cubitus valgus?
deformity of the elbow in which it deviates away from the midline of the body when extended.
