CES Human Anatomy & Biomechanics

Question 1

Which spinal region is most commonly affected by work-related musculoskeletal disorders in office workers?

Accepted Answer

Lumbar

Answer

The lumbar spine bears the most compressive load during prolonged sitting, making it the most common site of work-related back pain.

Question 2

What is the name of the fibrocartilaginous discs located between vertebral bodies?

Accepted Answer

Intervertebral discs

Answer

Intervertebral discs act as shock absorbers between vertebral bodies and can herniate under excessive compressive or shear forces.

Question 3

The carpal tunnel is formed by the carpal bones and which ligament?

Accepted Answer

Transverse carpal ligament

Answer

The transverse carpal ligament (flexor retinaculum) forms the roof of the carpal tunnel through which the median nerve and flexor tendons pass.

Question 4

Which muscle group is primarily responsible for maintaining upright posture of the spine?

Accepted Answer

Erector spinae

Answer

The erector spinae muscle group runs along the spine and provides the primary extensor force needed to maintain upright posture.

Question 5

What term describes the force per unit area applied to a tissue?

Accepted Answer

Stress

Answer

Mechanical stress is defined as force divided by cross-sectional area and is a key factor in tissue injury thresholds.

CES - Certified Ergonomic Specialist Practice Test