Tendon versus ligament
Tendon- Connects muscle to bone
Ligament- Connects bone to bone
Carpel Tunnel Syndrome
-What is it?
-Test to determine it?
Also sometimes called?
Swelling of tendons pinches the median nerve on the palmer side of the wrist
-PHALENS TEST
- Tingling and numbing of fingers
-Also sometimes called: writers cramp, neuritis, and median neuritis
Lateral Epicondylitis
versus
Medial Epicondylitis
LATERAL- Tennis elbow: Tendons on the outside of the elbow are injured
- Caused by jerky throwing motions
Medial- Golfers elbow: Tendons on the inside of the elbow are injured
Tendinitis
Inflammation of tendons
- Repeated tension, motion, and bending
Trigger finger
What causes it?
Special case of tenosynovitis.
causes a finger or thumb to lock, click, or catch in a bent position due to inflammation of the tendon sheath, often resulting from repetitive gripping
White finger
Raynauds syndrome
-insufficient blood supply
-Arteries close due to vibrations
Standing working heights:
Delicate work:
Light work:
Heavy work:
Delicate work: 2”- 4” ABOVE elbow
Light work: 2”- 4” BELOW elbow
Heavy work: 4”- 6” BELOW elbow
Ergonomics designs for 90% of the population which is:
5th percentile female and the 95th percentile male
Hand Deviations:
Radial
Ulnar
Flexion
Extension
Radial- rad
Ulnar- away
Flexion
Extension
DeQuarvains Syndrome
What is it?
Caused by?
Test for it?
Tendosynovitis at the base of the thumb
-caused by gripping and hand twisting (wringing out clothes)
-FINKLESTEINS
Impulse versus impact vibrations
Impulse= gun shot
Impact= jackhammer
NIOSH lifting equation, lifting index after you calculate the RWL:
What is good or bad?
Lifting index= actual weight/ RWL
> 1 is bad (increased risk of lower back injury and the task should be redesigned)
What is the NIOSH lifting equation constant?
51
