CCSP Clinical Biomechanics in Sports 5

Question 1

The valgus extension overload syndrome in baseball pitchers involves impingement of which structures at the posteromedial elbow?

Accepted Answer

Posteromedial olecranon tip and olecranon fossa

Answer

Valgus stress during throwing drives the posteromedial olecranon tip into the olecranon fossa, causing impingement, osteophyte formation, and loose bodies.

Question 2

Muscle pennation angle affects force production such that a greater pennation angle:

Accepted Answer

Allows more fibers to pack into a given cross-section, increasing force capacity

Answer

Higher pennation angles allow more fibers per unit volume (greater PCSA), increasing maximal force output despite reducing the component of force transmitted along the tendon.

Question 3

During sidestep cutting maneuvers, female athletes demonstrate greater knee abduction moments than males, which is partly attributed to:

Accepted Answer

Reduced hip and trunk neuromuscular control and wider pelvis

Answer

Females tend to have wider pelves (larger Q-angle) and exhibit reduced hip abductor and trunk activation during cutting, increasing dynamic knee valgus and ACL stress.

Question 4

In cervical spine biomechanics, the C1-C2 (atlantoaxial) segment is responsible for approximately what percentage of total cervical rotation?

Accepted Answer

50%

Answer

The atlantoaxial joint contributes approximately 50% of total cervical axial rotation due to the dens-pivot articulation.

Question 5

The 'degrees of freedom' of a joint refers to:

Accepted Answer

The number of independent directions in which a segment can move

Answer

Degrees of freedom describe the independent axes of motion available to a joint; the shoulder has 3 rotational DOF, making it the most mobile joint in the body.

(CCSP) Certified Chiropractic Sports Physician Practice Test

(CCSP) Certified Chiropractic Sports Physician Practice Test

CCSP Clinical Biomechanics in Sports 5