PRC Postural Assessment & Biomechanical Analysis 4

Question 1

Which of the following best describes the biomechanical role of the left serratus anterior in PRI postural assessment?

Accepted Answer

It assists in achieving left thoracic A/P expansion and left rib cage apposition

Answer

It posteriorly tilts the left scapula only

Answer

It exclusively rotates the left thorax

Answer

It inhibits the left upper trapezius

Question 2

During assessment, a patient demonstrates inability to maintain a posterior pelvic tilt while in the supine 90/90 position. What does this finding indicate in PRI terms?

Accepted Answer

Inability to achieve sacral counter-nutation and posterior innominate rotation

Answer

Adequate hamstring flexibility

Answer

Excessive lumbar flexion

Answer

Overactive gluteus medius

Question 3

In the PRI Myokinematic Restoration program, what is the clinical significance of the 'right hip extension test' being positive?

Accepted Answer

The right hip cannot achieve extension without right lumbar extension compensation

Answer

The right hip has excessive posterior capsule mobility

Answer

The right hip is hypermobile in extension

Answer

The right gluteus maximus is overactive

Question 4

What does the term 'PEC' (Posterior Exterior Chain) refer to in a PRI postural assessment context?

Accepted Answer

A chain of muscles from the left glute/piriformis through the ipsilateral erector spinae to the contralateral latissimus

Answer

The posterior chain including lumbar extensors and hamstrings only

Answer

The posterior external oblique chain on the right side

Answer

The paraspinal muscles in extension

Question 5

A PRI postural screen reveals a patient's left patella tracks laterally and the left foot is supinated at rest. What does this pattern most likely reflect at the pelvis and hip?

Accepted Answer

Left hip in AF ER (external rotation) and left innominate posterior rotation

Answer

Left hip in AF IR (internal rotation) and left innominate anterior rotation

Answer

Bilateral anterior pelvic tilt without rotation

Answer

Right innominate anterior rotation only

Question 6

During a PRI neuromuscular assessment, what is the purpose of manual muscle testing the right glute max in a left AIC pattern patient?

Accepted Answer

To assess whether the right posterior chain is inhibited due to the dominant left AIC pattern

Answer

To confirm piriformis tightness on the right

Answer

To rule out L4 nerve root involvement

Answer

To measure hip extension range of motion

Question 7

Which assessment finding would suggest a patient has achieved 'alternating reciprocal gait' potential during PRI evaluation?

Accepted Answer

Ability to demonstrate both left and right AF IR and AF ER at the hip through range

Answer

Symmetric ASIS height with bilateral hip adduction weakness

Answer

Absence of lumbar lordosis and flat thoracic spine

Answer

Equal bilateral grip strength