MPT Anatomy and Kinesiology 2

Question 1

During normal gait, which phase of the gait cycle requires the greatest quadriceps activity?

Accepted Answer

Loading response (early stance)

Answer

The loading response (initial 0-12% of gait cycle) demands peak quadriceps activity to control knee flexion and accept body weight during weight acceptance.

Question 2

The carrying angle of the elbow is formed between which two bones?

Accepted Answer

Humerus and ulna

Answer

The carrying angle is the valgus angle formed between the long axis of the humerus and the long axis of the ulna when the elbow is fully extended and the forearm supinated. Normal values are 5-15 degrees in men and 10-25 degrees in women.

Question 3

The screw-home mechanism of the knee occurs during the last degrees of extension and involves which rotation?

Accepted Answer

Lateral rotation of the femur on the tibia

Answer

The screw-home mechanism involves lateral rotation of the femur (or medial rotation of the tibia in open kinetic chain) during the last 30 degrees of knee extension, locking the knee for weight-bearing.

Question 4

Which rotator cuff muscle is most likely to be torn in a classic degenerative rotator cuff injury?

Accepted Answer

Supraspinatus

Answer

The supraspinatus is most commonly torn, often at its critical zone — a relatively avascular area approximately 1 cm proximal to its insertion on the greater tuberosity.

Question 5

In the spine, which ligament runs within the vertebral canal on the posterior surface of the vertebral bodies?

Accepted Answer

Posterior longitudinal ligament

Answer

The posterior longitudinal ligament runs along the posterior surface of the vertebral bodies inside the vertebral canal, resisting spinal flexion and posterior disc herniation.

MPT - Master of Physical Therapy Practice Test

MPT - Master of Physical Therapy Practice Test

MPT Anatomy and Kinesiology 2