Biomechanics & Body Movement Analysis Flashcards
7 cards from real AK practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Biomechanics & Body Movement Analysis flashcards as text
In applied kinesiology, what does a 'bilateral weight shift test' primarily assess?
Answer: The symmetry of weight-bearing through the lower extremities and pelvis
The bilateral weight shift test reveals asymmetric loading patterns that may indicate pelvic imbalance, leg-length discrepancy, or compensatory postural adaptations.
Which connective tissue structure provides the primary passive restraint against anterior tibial translation at the knee?
Answer: Anterior cruciate ligament
The anterior cruciate ligament (ACL) is the main passive restraint preventing the tibia from sliding anteriorly relative to the femur.
What is the primary determinant of whether a muscle acts as a prime mover or stabilizer in a given movement?
Answer: The direction of the line of pull relative to the joint axis
The line of pull relative to the joint's axis of motion determines whether a muscle produces torque (prime mover) or compressive joint force (stabilizer).
During normal walking, at which phase of the gait cycle does peak hip extension occur?
Answer: Terminal stance
Peak hip extension occurs during terminal stance as the body pivots over the stance foot and the trailing limb reaches maximum extension before toe-off.
The screw-home mechanism of the knee involves which motion as the joint reaches full extension?
Answer: Tibial external rotation
As the knee reaches full extension, the tibia externally rotates on the femur (or the femur internally rotates on a fixed tibia), locking the joint into the close-packed position.
Which law states that bone tissue is deposited along lines of mechanical stress and resorbed where stress is absent?
Answer: Wolff's Law
Wolff's Law describes the adaptive remodeling of bone in response to mechanical loading, with trabecular bone aligning along principal stress trajectories.
A client presents with forward head posture. Which cervical movement is characteristically restricted as a compensatory adaptation?
Answer: Upper cervical flexion / chin tuck
Forward head posture involves upper cervical extension and lower cervical flexion; upper cervical flexion (chin tuck) is typically restricted as the suboccipital muscles adaptively shorten.