DO DO Anatomy and Physiology 1

Question 1

Which muscle is the primary hip flexor and is most frequently implicated in lumbar somatic dysfunction?

Accepted Answer

Psoas major

Answer

The psoas major attaches to L1–L5 vertebral bodies, and its tightness commonly causes lumbar somatic dysfunction.

Question 2

The thoracic inlet is bounded posteriorly, laterally, and anteriorly by which structures?

Accepted Answer

T1 vertebra, first rib, manubrium

Answer

The thoracic inlet is the superior opening of the thorax, bounded by T1 posteriorly, the first rib laterally, and the manubrium anteriorly.

Question 3

Which nerve passes inferior to (or through) the piriformis and is compressed in piriformis syndrome?

Accepted Answer

Sciatic nerve

Answer

The sciatic nerve typically exits inferior to the piriformis; in some individuals it passes through it, making it vulnerable to piriformis compression.

Question 4

The sacrotuberous and sacrospinous ligaments are clinically important in OMM because they perform which function?

Accepted Answer

Stabilize the sacroiliac joint and resist excessive sacral nutation

Answer

These two ligaments are primary stabilizers of the SI joint, resisting excessive sacral nutation (forward flexion).

Question 5

The thoracolumbar fascia is significant in OMM because it connects which structures?

Accepted Answer

Thoracic/lumbar spine to pelvis, gluteal muscles, and upper extremity via latissimus dorsi

Answer

The thoracolumbar fascia is a broad connective tissue sheet integrating the spine, pelvis, gluteals, and upper body muscles into a force-transfer unit.

DO - Doctor of Osteopathic Medicine Practice Test

DO - Doctor of Osteopathic Medicine Practice Test

DO DO Anatomy and Physiology 1