PRC PRC Muscle Imbalance & Pattern Recognition 1 — Questions and Answers
Question 1: In Postural Restoration, the Left AIC pattern primarily involves which finding?
- Left innominate in anterior rotation with left hip internal rotation (Correct answer)
- Right innominate in anterior rotation with bilateral hip external rotation
- Left posterior superior iliac spine elevation with sacral nutation
- Bilateral sacral counternutation with lumbar flattening
Correct answer: Left innominate in anterior rotation with left hip internal rotation
The Left AIC pattern features a left innominate in anterior rotation with associated left hip internal rotation and compensatory right hip external rotation.
Question 2: Which muscle is considered a primary driver of the Right BC (Brachial Chain) pattern in PRI?
- Left serratus anterior
- Right pectoralis minor (Correct answer)
- Left latissimus dorsi
- Right middle trapezius
Correct answer: Right pectoralis minor
The right pectoralis minor is a key driver of the Right BC pattern, pulling the right shoulder into a forward and depressed position.
Question 3: In the typical PRI asymmetrical human presentation, which femur is most commonly found in a relatively forward or anterior position?
- Left (Correct answer)
- Right
- Both equally
- Neither; PRI considers this normal
Correct answer: Left
In the typical PRI asymmetrical pattern, the left femur is positioned more anteriorly due to left AIC involvement and associated left innominate anterior rotation.
Question 4: The PEC pattern in PRI refers to which myofascial chain?
- Posterior Exterior Chain (Correct answer)
- Pelvic Extension Complex
- Posterior External Capsule
- Pelvic Expansion and Compression
Correct answer: Posterior Exterior Chain
PEC (Posterior Exterior Chain) is a bilateral pattern involving posterior pelvis and thorax overactivation with associated respiratory and lumbar extension dysfunction.
Question 5: Which muscle imbalance is most characteristic of a left-sided AF IR (Acetabular Femoral Internal Rotation) limitation in PRI?
- Overactive left hip flexors restricting anterior pelvic tilt
- Overactive right adductors and left hip external rotators limiting left femoral internal rotation (Correct answer)
- Bilateral gluteus maximus inhibition with sacral counternutation
- Right psoas hypertonicity driving lumbar hyperlordosis
Correct answer: Overactive right adductors and left hip external rotators limiting left femoral internal rotation
Left AFIR limitation is characterized by overactive right adductors pulling the pelvis and overactive left hip external rotators preventing adequate left femoral internal rotation.
Question 6: In PRI, the TMCC pattern refers to which chain?
- Temporal Mandibular Cervical Chain (Correct answer)
- Thoracolumbar Myofascial Cervical Complex
- Temporal Mandibular Compression Complex
- Thoracic Medial Cervical Chain
Correct answer: Temporal Mandibular Cervical Chain
The TMCC (Temporal Mandibular Cervical Chain) involves the relationship between the jaw, cervical spine, and associated myofascial structures linking craniofacial to cervicothoracic regions.
PRC PRC Muscle Imbalance & Pattern Recognition 1
In Postural Restoration, the Left AIC pattern primarily involves which finding?