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PAS 407 The Elbow Joint And Brachium 2024/2025 verified Solution
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PAS 407 The Elbow Joint And Brachium 2024/2025 verified Solution
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Passed!!2024/2025
PAS 407: The Elbow Joint And
Brachium
What type of joint is the elbow? Answer: hinge joint
What does a hinge joint allow for? Answer: allow flexion & extension in a
single plane
There is a minute amount of what movement in a hinge joint? Answer:
abduction, adduction, and rotation
What is the purpose of the trochlear notch? Answer: to maximize surface
area contact and prevents medial and lateral shifting
What are the two distinct articulations of the elbow joint? Answer: 1.)
humerus with the ulna through the trochlea
2.) humerus with the radius through the capitulum
What is a common feature of a hinge joint? Answer: laxity
What is laxity? Answer: anterior and posterior regions of joint capsule that
accomadates flexion and extension and bilateral reinforcement to help resist
abduction and adduction
What are the collateral ligaments? Answer: medial collateral ligament (MCL)
lateral collateral ligament (LCL)
, Passed!!
2024/2025
What do the collateral ligaments do? Answer: supply stability in the frontal
plane, tighten during extension, slacken during flexion
What are the three collateral ligaments of the elbow joint? Answer: 1.) lateral
collateral ligament
2.) annular ligament
3.) medial collateral ligament
What are the three bands that make up the medial collateral ligament? Answer:
1.) anterior band
2.) posterior band
3.) oblique band
What do the anterior and posterior bands of the medial collateral ligament do?
Answer: They reinforce the joint
What does the oblique band of the medial collateral ligament do? Answer:
deepens the articulating surface
What does the lateral collateral ligament do? Answer: reinforces proximal
radioulnar joint to resist varus stresses
What does the medial collateral ligament do? Answer: the bands collectively
serve to resist vagus stresses on the elbow
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