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Elbow Joints

4 different joints of the elbow

QuestionAnswer
"Elbow joint" humeroulnar
"Elbow joint" Humeroradial
"Elbow joint" Superior radioulnar
"Elbow joint" Inferior radioulnar
In the sagittal plane, the elbow flexes how many degrees? 145 degrees
In the sagittal plane the elbow extends how many degrees? 0 degrees
What is common at the elbow, but not normal? Hyperextension
Blocks hyperextension of the elbow Olecranon process
The elbow joint can be measured best when what is glued to my side? Humerus
What kind of joint is the humeroulnar? Hinge joint
What is the rom of the humeroulnar joint? 0-145 degrees
What is the resting position of the Humeroulnar joint? 70 degrees flexion; 10 degrees supination
When the humeroulnar joint is under the most tension with no slack, in full extension, this is called the... closed pack position
Any diarthrodial joint whose stabilizing structures and joint capsule are under th most tension with no slack closed pack position
People who fracture wrists often end up with limited pronation and supination. Why? radius and ulna work together with the wrist.
The Humeroradial joint is a hinge joint
The humeroradial joint ROM is 0-145 degrees
How many axis does the humeroradial joint have? one
How many degrees of freedom does the humeroradial joint have? one
What k ind of movement does the humeroradial joint perform? flexion and extension
Whick plane does the humeroradial joint move in? saggital
What is the resting position of the humeroradial joint? full extension with supination
What is the closed pack position for the humeroradial joint? 90 flexion, 5 supination
What is the closed pack position of the humeroulnar joint? full extension with supination
The closed pack position for humeroulnar and humeroradial are different
Radius and Ulna articulation near humerus is called Superior or proximal
Radius and Ulna articulation near the wrist is called inferior or distal
The Radius and Ulna superior and inferior articulations form what kind of joint? pivot joint
supination for radioulnar articulation is 90 degrees
Pronation for radioulnar articulation is 80 degrees
Ulna does not rotate
moves around the ulna? the radius
supination for the radioulnar joint is 90
pronation for the radioulnar joint is 80
people with restricted supination and pronation will compensate with their glenohumeral joint
The interosseous membrane between the shafts of the radius and ulna restrict radial movement
The humerus and the forearm form an angle
The trochlea is lower than the capitulum, and this means the distal end of the humerus is not level.
the angle of the humerus and forearm in anatomical position is called carrying angle
What is the carrying angle in men? 5 degrees
What is the carrying angle in women? 10-15 degrees
The carrying angle of the humerus and forearm is different in men and women because of pelvis size.
the reason the radius and ulna are not in line with the humerus during extension is because the bones are not paralell
During extension of the radius and ulna, the hand is outside an imaginary line
In flexion of the radius and ulna, the hand is inside an imaginary line allowing us to eat without rotation
my radius and ulna do not need to rotate when I bring my hand to my mouth because of my forearm's natural carrying angle
Created by: mroys@mwcc.edu
 

 



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