ergonomics chapter 25

Question 1

MSDS

Answer 1

musculoskeletal disorders

Question 2

three interrelated factors that contribute to increased risk of job-related injury

Answer 2

posture, repetition, force

Question 3

what posture affects

Answer 3

affects the ability of DA to reach, hold and use the equipment.
Influences how long DA can perform tasks
Can get worse

Question 4

how to sit

Answer 4

establish a neutral position by sitting upright with your weight evenly distributed.
The feet should be flat on the ground, the back should be leaning against the chair, hips should lean forward.

Question 5

extreme stretching of muscles and tendons causes

Answer 5

strains

Question 6

sudden twist or wrenching of a joint with stretching or tearing of ligaments is

Answer 6

sprains

Question 7

frequently used items such as air water syringe, handpiece, saliva ejector, and high volume oral evacuator so they’re within

Answer 7

normal horizontal reach

Question 8

keep operatory light within safe

Answer 8

maximum vertical reach

Question 9

other supplies used less frequently should be placed within

Answer 9

maximum horizontal reach

Question 10

repetitive motion, over flexing and extension of the wrist, can significantly increase the risk of

Answer 10

cumulative trauma disorders (CTD)

Question 11

term carpal tunnel refers to

Answer 11

an anatomic area of the hand/wrist

Question 12

The first symptom of cts are

Answer 12

painful tingling in one or both hands. Decreased ability and power to squeeze objects or make a tight fist

Question 13

because of cts which muscle weakens

Answer 13

thenar muscle (located at the base of the thumb

Question 14

what position is believed to be the most important

Answer 14

resting hands are frequently believed to be the most important factors in preventing CTS

Question 15

To give your eyes some rest what should you do

Answer 15

lookup from the task and focus your eyes at a distance for about 20 seconds

Question 16

back exercise

Answer 16

sit on the chair and allow arms and head to fall between the knees

Question 17

neck exercise

Answer 17

head rotations for neck stiffness, right/left, forward/backward

Question 18

shoulder exercise

Answer 18

shoulder shrugging, pull shoulders up towards the ears, roll them backward then forward

Question 19

ergonomics is the

Answer 19

adaptation of the work environment to the human body

Question 20

the goal of ergonomics is to

Answer 20

help people stay healthy, perform work more effectively

Question 21

most common risk factor contributing to musculoskeletal disorders

Answer 21

poor posture

Question 22

a reach that is created by the sweep of the forearm with the upper arm held at the side is

Answer 22

normal horizontal reach

Question 23

what type of gloves are most likely to aggravate carpal tunnel syndrome

Answer 23

ambidextrous gloves

Question 24

what is one of the most important factors in preventing carpal tunnel syndrome

Answer 24

resting the hands

Question 25

conditions of the muscles and skeleton such as neck and shoulder pain, back pain, and carpal tunnel syndrome

Answer 25

musculoskeletal disorder

Question 26

is the fleshy elevation of the palm side of the hand

Answer 26

thenar eminence

Question 27

repetition and force

Answer 27

repetitive motion, overflowing, and extension of the wrist can increase the risk of CTD

Question 28

how cts appears

Answer 28

with improper motions, the tendons swell and exert pressure on the median nerve