CIEE Biomechanics & Musculoskeletal Disorder Mechanisms 2

Question 1

Which condition is characterized by inflammation of the tendons attaching the forearm muscles to the lateral epicondyle of the elbow?

Accepted Answer

Lateral epicondylitis (tennis elbow)

Answer

Lateral epicondylitis involves repetitive strain of the wrist extensor tendons at their attachment to the lateral epicondyle, causing pain and inflammation from cumulative micro-trauma.

Question 2

What effect does maintaining a forward-flexed trunk posture have on spinal disc pressure compared to standing upright?

Accepted Answer

Increases disc pressure significantly due to greater moment arm

Answer

Forward trunk flexion increases the moment arm of the upper body weight relative to the lumbar spine, substantially increasing compressive disc pressure beyond that of upright standing.

Question 3

Which nerve is compressed in carpal tunnel syndrome, causing numbness and tingling in the hand?

Accepted Answer

Median nerve

Answer

Carpal tunnel syndrome results from compression of the median nerve as it passes through the carpal tunnel, causing sensory and motor symptoms on the palm-side of the hand.

Question 4

What does the NIOSH lifting equation directly calculate as its primary output for assessing a lifting task?

Accepted Answer

Recommended Weight Limit (RWL)

Answer

The NIOSH lifting equation calculates the Recommended Weight Limit (RWL) based on task variables; the Lifting Index (LI) is then determined by dividing the actual load by the RWL.

Question 5

What is the primary biomechanical mechanism by which intra-abdominal pressure (IAP) assists the spine during heavy lifting?

Accepted Answer

It creates an internal pressure cylinder that reduces net spinal compressive loading

Answer

Increased intra-abdominal pressure creates an internal hydraulic cylinder effect in the abdominal cavity that helps support the trunk and reduce net compressive forces on the lumbar spine.

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

CIEE Biomechanics & Musculoskeletal Disorder Mechanisms 2