CIEE Biomechanics & Musculoskeletal Disorder Mechanisms 3

Question 1

What is the relationship between the frequency of repetitive motions and the risk of developing musculoskeletal disorders (MSDs)?

Accepted Answer

Higher frequency increases MSD risk, especially when combined with force and awkward posture

Answer

Repetition frequency is a key risk factor that, when combined with forceful exertions and awkward postures, increases cumulative trauma to musculoskeletal tissues beyond their recovery capacity.

Question 2

Which wrist position is considered 'neutral' and minimizes biomechanical stress on tendons and the median nerve?

Accepted Answer

Straight alignment with the forearm with minimal flexion, extension, or deviation

Answer

Neutral wrist posture maintains the wrist in straight alignment with the forearm, minimizing tendon stress, carpal tunnel pressure, and nerve compression.

Question 3

What is De Quervain's tenosynovitis and which primary motion pattern causes it?

Accepted Answer

Inflammation of the abductor pollicis longus and extensor pollicis brevis tendons caused by repetitive thumb and radial deviation movements

Answer

De Quervain's tenosynovitis affects the tendons controlling thumb movement on the radial side of the wrist, typically caused by repetitive grasping combined with radial or ulnar wrist deviation.

Question 4

The Borg CR-10 scale is used in ergonomic job analysis primarily to measure what?

Accepted Answer

Subjective perceived exertion and physical effort during work tasks

Answer

The Borg CR-10 scale is a validated psychophysical tool that quantifies a worker's subjective perceived exertion, helping ergonomists assess physical workload demands during job tasks.

Question 5

What does 'cumulative trauma disorder' (CTD) describe in the context of occupational musculoskeletal health?

Accepted Answer

A progressive musculoskeletal disorder resulting from repeated micro-trauma over time without adequate tissue recovery

Answer

CTDs develop from cumulative micro-damage to muscles, tendons, and nerves caused by repeated ergonomic stressor exposures that exceed the body's ability to recover between work cycles.

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

CIEE Biomechanics & Musculoskeletal Disorder Mechanisms 3