Unit 3: Week 2

Question 1

postural stability

Answer 1

the ability to control COM in relationship to BOS

Question 2

Center of Mass

Answer 2

point at center of total body mass, which is determined by finding weighted average of the com of each body segment

Question 3

Center of Gravity

Answer 3

verticle projection of COM

Question 4

BOS

Answer 4

area of body thats in contact w support surfaces

Question 5

T or F: older adults have increased postural sway

Answer 5

TRUE

Question 6

T or F: older adults shifts weight towards toes

Answer 6

no false- shift weight to heels

Question 7

Progression

Answer 7

ability to initiate and maintain movement including coordinated actions of muscle groups to produce forward motion

Question 8

adaptation:

Answer 8

ability to adjust gait patterns in response to changing envmt demands or unexpected obstacles

Question 9

steady state gait

Answer 9

consistent, uninterrupted walking over flat surface at constant speed

Question 10

kinematics of steady state gate

Answer 10

study of motion wo considering forces that cause it

Question 11

stride length

Answer 11

initial contact to initial contact of same foot

Question 12

cadence

Answer 12

steps per min

Question 13

walking speed

Answer 13

stride length x cadence

Question 14

stance phase

Answer 14

60% of gait cycle foot in contact w ground

heel strike, mid stance, toe offs

Question 15

swing phase

Answer 15

initial swing, mid, terminal swing

40% of gait cycle

Question 16

stance phase ascent elements

Answer 16

• weight acceptance:transfer weight to leading leg
• pull up: quads and glutes engage to lift body up
• forward continuance: maintain forward momentum by propelling body upward and transitioning to next step

Question 17

ascent swing phase elements

Answer 17

• foot clearance: lift back leg to clear step
• foot placement: place foot on next step and prepare for weight acceptance

Question 18

explain the descent stance phase

Answer 18

weight acceptance:transfer weight to leading leg as it contacts lower step

forward continuance: maintain forward moementum by shifting weight

controlled lowering: gradually lower body controlled

Question 19

EXPLAIN descent swing phase elements

Answer 19

LEG PULL THROUGH: lift trailing leg to clear lower step and initate swing phase

preparation for foot placement on lower step

Question 20

Sit to Stand Phases

Answer 20

preparation phase
weight transfer phase
rising phase
stabilization phase