CEAS Human Anatomy & Biomechanics 1

Question 1

The lumbar spine consists of how many vertebrae?

Accepted Answer

Five (L1–L5)

Answer

The lumbar spine contains five vertebrae (L1–L5), which bear the greatest compressive loads and are most vulnerable to work-related injury.

Question 2

The carpal tunnel is bounded on three sides by carpal bones and on the palmar surface by which structure?

Accepted Answer

Flexor retinaculum (transverse carpal ligament)

Answer

The flexor retinaculum (transverse carpal ligament) forms the roof of the carpal tunnel on the palmar side, and tightening of this structure compresses the median nerve.

Question 3

In seated workstation ergonomics, the 'hip angle' is defined as the angle between:

Accepted Answer

The trunk and the thigh

Answer

The hip angle is formed between the trunk and the thigh; a range of approximately 90–110° is recommended for a neutral, low-stress seated posture.

Question 4

Which spinal structure primarily absorbs compressive forces and allows movement between adjacent vertebrae?

Accepted Answer

Intervertebral disc

Answer

The intervertebral disc, composed of the nucleus pulposus and annulus fibrosus, acts as a hydraulic shock absorber between vertebral bodies.

Question 5

Ulnar deviation of the wrist describes movement of the hand toward:

Accepted Answer

The little finger (ulnar) side

Answer

Ulnar deviation moves the hand toward the ulnar (little finger) side and is a posture commonly associated with elevated risk of carpal tunnel syndrome.

CEAS - Certified Ergonomics Assessment Specialist Practice Test

CEAS - Certified Ergonomics Assessment Specialist Practice Test

CEAS Human Anatomy & Biomechanics 1