Clinical Biomechanics in Sports Flashcards
7 cards from real CCSP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Clinical Biomechanics in Sports flashcards as text
The valgus extension overload syndrome in baseball pitchers involves impingement of which structures at the posteromedial elbow?
Answer: Posteromedial olecranon tip and olecranon fossa
Valgus stress during throwing drives the posteromedial olecranon tip into the olecranon fossa, causing impingement, osteophyte formation, and loose bodies.
Muscle pennation angle affects force production such that a greater pennation angle:
Answer: Allows more fibers to pack into a given cross-section, increasing force capacity
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.
During sidestep cutting maneuvers, female athletes demonstrate greater knee abduction moments than males, which is partly attributed to:
Answer: Reduced hip and trunk neuromuscular control and wider pelvis
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.
In cervical spine biomechanics, the C1-C2 (atlantoaxial) segment is responsible for approximately what percentage of total cervical rotation?
Answer: 50%
The atlantoaxial joint contributes approximately 50% of total cervical axial rotation due to the dens-pivot articulation.
The 'degrees of freedom' of a joint refers to:
Answer: The number of independent directions in which a segment can move
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.
A sprinter with excessive anterior pelvic tilt is MOST likely to develop which overuse injury pattern?
Answer: Proximal hamstring tendinopathy and hip flexor shortening
Anterior pelvic tilt places the hamstrings in a lengthened, high-strain position at the ischial tuberosity while keeping the hip flexors adaptively shortened.
When assessing shoulder scapulohumeral rhythm, the normal ratio of glenohumeral to scapulothoracic motion during arm elevation is approximately:
Answer: 2:1
The classic scapulohumeral rhythm is 2:1, meaning for every 3° of shoulder elevation, 2° occur at the glenohumeral joint and 1° at the scapulothoracic articulation.