Gravity and BOS

Question 1

Body’s COG changes with?

Answer 1

Movement

Question 2

COG lies closer to the end with the greatest

Answer 2

mass

Question 3

Gravity’s force is drawn as a

Answer 3

Vector

Question 4

When moving your arms up and to the left, your COG moves…

Answer 4

Up and leftwards

Question 5

COG in humans is where?

Women?

Answer 5

about 6in from the pubic symphasis

lower in women

Question 6

We are most stable when our ____ is over our _____

Answer 6

COG, BOS

Question 7

In a uniform object (ball), where is the the COG?

Answer 7

in the center

Question 8

In a non-uniform object (spoon), what changes because of an uneven distribution of weight?

Answer 8

The COG

Question 9

What does a lower COG give the body?

Answer 9

more stability

Question 10

What happens when the COG projection falls outside of our BOS?

Answer 10

We fall! (or stabilize with hand)

Question 11

What do children do when they learn to walk to help them balance

Answer 11

Lower their base of support by using a wide stance

Question 12

Long sit allows for a larger what?

Answer 12

BOS

Question 13

When long sitting, what do you use to maintain your COG projection over BOS?

Answer 13

Your upper body

Question 14

When Iris moves her R hand over her head and forward, her COG moves….

Answer 14

upward and forward

Question 15

Iris’s MS affects her weight bearing. She has trouble reaching into her cabinets (with her right hand) without falling forward. What should she do?

Answer 15

Use her left hand to balance on counter, and use a long handed reacher

Question 16

Where should a person’s feet be in relation to a wheel chair when transfering?

Answer 16

Not too close and not too far so that their COG is over their BOS

Question 17

What should the therapist’s position be when transferring a person out of a wheelchair?

Answer 17

Close to patient, keep back straight, knees bent, (good body mechanics),

COG over BOS!

Question 18

How should reclining wheelchairs be positioned?

Answer 18

Can only go as far back as will allow the COG to still be over the BOS

Question 19

Why would one use a “tilt in space” wheelchair?

Answer 19

• relieves pressure
• not in danger of falling
• COG adjusted over large BOS

Question 20

Where does the COG lie for a person in a wheelchair?

Answer 20

Forward and slightly higher

Question 21

With an amputation where does the COG lie? (wheelchair user)

Answer 21

more towards the rear

Question 22

What is there a risk for, for a person with an amputation using a wheelchair?

Answer 22

falling backwards

Question 23

What is special about the design of a rear-wheel camber

Answer 23

the bottom of the chair rims are further apart

Question 24

What are the functional benefits of using a rear-wheel camber

Answer 24

You need less shoulder abduction and scapular elevation because the top of the wheel lies closer to the body

Question 25

What activity are rear-wheel cambers good for?

Answer 25

Sports!