Musculoskeletal Disorder Prevention Flashcards
7 cards from real CEA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Musculoskeletal Disorder Prevention flashcards as text
Which of the following best describes the 'dose-response relationship' in MSD risk assessment?
Answer: Greater exposure to a risk factor increases the likelihood of developing an MSD
The dose-response relationship means that as exposure to ergonomic risk factors (force, repetition, awkward posture) increases, the probability and severity of MSDs increase.
A warehouse worker reports tingling and numbness in the thumb, index, and middle fingers that worsens at night. Which MSD is most consistent with these symptoms?
Answer: Carpal tunnel syndrome
Carpal tunnel syndrome compresses the median nerve, causing tingling and numbness in the thumb, index, and middle fingers, often worse at night.
Which administrative control is MOST effective at reducing MSD risk from highly repetitive tasks?
Answer: Implementing job rotation among tasks with different muscle group demands
Job rotation among tasks that use different muscle groups reduces cumulative loading on any single tissue, lowering MSD risk.
The concept of 'tissue tolerance' in ergonomics refers to:
Answer: The maximum load a biological tissue can sustain before damage occurs
Tissue tolerance is the threshold load beyond which musculoskeletal tissues (tendons, muscles, discs) sustain micro-damage that can accumulate into an MSD.
In the NIOSH lifting equation, what does the 'Asymmetry Multiplier (AM)' account for?
Answer: Twisting of the torso away from the sagittal plane during lifting
The Asymmetry Multiplier penalizes lifting tasks that require trunk rotation, as twisting significantly increases spinal loading and disc injury risk.
Which of the following work scenarios presents the HIGHEST risk of developing lateral epicondylitis (tennis elbow)?
Answer: Repeated pronation and wrist extension while using hand tools
Lateral epicondylitis results from overloading the wrist extensor tendons, commonly caused by repetitive forearm pronation and wrist extension with gripping.
During an ergonomic intervention evaluation, what does the term 'leading indicator' refer to?
Answer: A proactive measure such as near-miss reports or discomfort survey scores that predict future injury risk
Leading indicators are proactive, predictive metrics (e.g., discomfort surveys, near-miss reports) that signal MSD risk before injuries occur, unlike lagging indicators which record past events.