Human Anatomy & Biomechanics Flashcards
6 cards from real CES practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Human Anatomy & Biomechanics flashcards as text
In the NIOSH Lifting Equation, what does the load constant (LC) represent?
Answer: Weight under ideal lifting conditions (23 kg)
The NIOSH load constant of 23 kg (51 lb) represents the maximum recommended load weight under ideal lifting conditions.
Which joint in the upper extremity is most vulnerable to cumulative trauma from repetitive overhead work?
Answer: Shoulder (glenohumeral)
The glenohumeral joint has a wide range of motion but minimal bony stability, making the rotator cuff tendons highly susceptible to impingement during overhead tasks.
What is 'ulnar deviation' of the wrist?
Answer: Bending wrist toward the pinky side
Ulnar deviation is lateral flexion of the wrist toward the ulna (pinky side) and is a common risk factor for carpal tunnel syndrome.
Which nerve is compressed in cubital tunnel syndrome?
Answer: Ulnar nerve
Cubital tunnel syndrome involves compression of the ulnar nerve at the elbow, causing numbness in the ring and pinky fingers.
What does 'moment arm' refer to in biomechanics?
Answer: The perpendicular distance from a joint to the line of force
The moment arm is the perpendicular distance from the joint axis to the line of action of the force, determining the torque produced.
Prolonged static loading of muscles primarily increases the risk of which condition?
Answer: Muscle fatigue and ischemia
Static muscle contractions restrict blood flow, leading to oxygen deprivation, metabolic waste accumulation, and accelerated fatigue.