Understanding Musculoskeletal Disorders

What does repetitive motion refer to?

• Lifting heavy loads once a day

• Performing different tasks with rest

• The performance of the same motions over and over within a given time period

• Resting between short tasks

Prolonged ____________ can contribute to chronic muscle injuries.

• Relaxation

• Flexion, extension, lateral bending, and twisting

• Deep breathing

• Lying down

Which nerve is commonly injured in wrist overuse conditions like carpal tunnel syndrome?

• Ulnar nerve

• Median nerve

• Radial nerve

• Sciatic nerve

What are the risk factors of neck disorders?

• Prevalence high among visual display unit operators

• Prolonged flexion, extension, lateral bending, twisting

• Psychological stress

• All of the above

Why is it important to consider the texture and friction properties of a tool handle?

• To make the tool look shiny

• To improve grip and prevent slipping

• To reduce tool cost

• To change the tool’s color

According to Drury et al., what is the recommended handle diameter range?

• 15 – 30 mm

• 25 – 40 mm

• 35 – 50 mm

• 20 – 60 mm

What is the most common method used to reduce or eliminate work-related musculoskeletal disorders (MSDs)?

• Ergonomic interventions

• Providing more coffee breaks

• Hiring more staff

• Increasing overtime

When using a hand tool, which muscles are primarily responsible for generating grip force?

• Shoulder and back muscles

• Neck and chest muscles

• Leg and abdominal muscles

• Hand and forearm muscles

Which ergonomic principle should be considered when selecting hand tools?

• Weight should be as heavy as possible

• Tool should require high grip force

• Tool should encourage wrist twisting

• Handle should fit the user’s hand comfortably

What is a key feature of a well-designed ergonomic hand tool?

• Neutral wrist posture

• Slippery surface

• Requires maximum effort

• Forces hand into awkward position