chapter 12 & 13; mobility and gait

Question 1

mobility

Answer 1

ability to independently and safely move oneself from one place to another

Question 2

essential requirements for gait

Answer 2

progression- rhythmic stepping pattern to move body forward
postural control- ensure orientation and stability
adaptability- adapt gait to changing task and environmental requirements

Question 3

dynamic stability

Answer 3

counteracting not only the force of gravity but also other expected and unexpected forces

Question 4

support phase

Answer 4

generate both horizontal forces(progression) and vertical forces(postural control) against gravity

Question 5

swing phase

Answer 5

advanement of swing leg (progression)and repositioning the limb in preparation for weight acceptance(postural control)

Question 6

normal gait pattern

Answer 6

symmetrical alternating gait; greatest dynamic ability for bipedal gait with minimal control demands

Question 7

phase lag

Answer 7

.5 means one limb initiates step cycle as opposite limb reaches midpoint of its own cycle

Question 8

stance

Answer 8

60%
5 subcategories:
1. initial contact
2. loading response(10% double contact)
3. midstance
4. terminal stance (40%)
5. preswing (last 10%)

Question 9

swing

Answer 9

40%
3 subcategories:
1. initial swing
2. midswing
3. terminal swing(40%)

Question 10

Double support

Answer 10

10%

Question 11

cadence

Answer 11

step frequency; steps per unit time or steps per minute

Question 12

velocity

Answer 12

average horizontal speed of body measured over one or more strides

Question 13

step length

Answer 13

distance from one foot strike to the foot strike of the other foot
ex: right step length is the distance from the left heel to the right heel when both feet are in contact with the ground

Question 14

stride length

Answer 14

distance from one heel strike to the next heel strike b the same foot
ex: right stride length is defined by the distance between one right heel strike and the next right heel strike

Question 15

normal walking speed

Answer 15

1.46m/sec, 1.9 steps/sec, step length of 76.3cm

Question 16

first requirement of gait

Answer 16

smooth forward progression of COM; coordinated action of motion across all joints

Question 17

compass gait

Answer 17

large vertical displacements of COM from large motions at hip

Question 18

eversion

Answer 18

loading response

Question 19

inversion

Answer 19

preswing

Question 20

subtalar motion

Answer 20

shock absorption during limb loading