Question

Which muscles would need to eccentrically control hip motion as a result of a hip flexion moment during gait AND where is the reaction force that caused this hip flexion moment?

A) Hip flexors, anterior to the hip joint.
B) Hip extension, anterior to the hip joint.
C) Hip flexors, posterior to the hip joint.
D) Hip extensors, posterior to the hip joint.

Answer 1

During a hip flexion moment in gait, the hip extensors located posterior to the hip joint are responsible for eccentrically controlling the motion, counteracting the ground reaction force. The correct option is D.

Step-by-step explanation:

The muscles that need to eccentrically control hip motion during a hip flexion moment in gait are the hip extensors, which are located posterior to the hip joint.

The reaction force that causes this hip flexion moment is typically the ground reaction force during the stance phase of walking, pushing the thigh and hip into flexion while the hip extensors (such as the gluteus maximus and the hamstrings) work to control and decelerate this movement.