SCS Anatomy & Biomechanics 2

Question 1

Which muscle is the primary dynamic supporter of the medial longitudinal arch of the foot?

Accepted Answer

Tibialis posterior

Answer

The tibialis posterior is the primary dynamic stabilizer of the medial longitudinal arch, coursing beneath and supporting it during weight-bearing.

Question 2

During the overhead throwing motion, which phase produces the greatest valgus stress on the medial elbow?

Accepted Answer

Late cocking

Answer

Late cocking generates the greatest valgus stress on the medial elbow as the shoulder reaches maximum external rotation and large deceleration forces build.

Question 3

Femoral anteversion is measured as the angle between which two reference axes?

Accepted Answer

Femoral neck axis and the transcondylar axis of the femoral condyles

Answer

Femoral anteversion is the angle between the femoral neck axis and the transcondylar axis, reflecting the forward twist of the proximal femur.

Question 4

Which type of muscle contraction generates the greatest force per unit of cross-sectional area?

Accepted Answer

Eccentric

Answer

Eccentric contractions generate more force per cross-sectional area than concentric or isometric contractions due to titin's passive contribution during muscle lengthening.

Question 5

The pivot shift test evaluates which combination of tibial movements in an ACL-deficient knee?

Accepted Answer

Anterior translation and internal rotation

Answer

The pivot shift tests for anterior tibial translation combined with internal rotation, the coupled motion that the ACL primarily restrains.

(SCS) Sports Clinical Specialist Practice Test

(SCS) Sports Clinical Specialist Practice Test

SCS Anatomy & Biomechanics 2