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Gait cycle
is the time from the point at whcih the heel of one foot touches the ground to the time it touches the ground again
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Stance Phase
is one of the two phases that occur during the gait cycle. It occurs when the foot is in contact with the floor and the extremity is bearing partial or total body weight.
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Heel Strike
(foot strike)- occurs when the heel or foot first comes in contact with the floor.
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Foot flat
as the term implies, occurs when th foot is flat on the floor.
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Midstance
phase occurs when the foot is directly under the body's weight and the entire foot is in contact with the floor. Because the body weight is transferred entirely to the one supporting leg and the other leg is in the middle of its swing phase, this is also referred to as single-leg support.
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Heel-off
occurs when the weight begins to transfer to the front of the foot, and the heel is lifted off the floor.
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Toe-off
occurs when the foot comes off the floor and the swing phase begins. This is also refferred to as push off, since the extremity now propels the body forward and the leg continues into the second phase of gait.
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Swing phase
The second phase of the gait cycle. Occurs when the foot is not in contact witht he floor and no weight is borne on the extremity. The swing phase begins with toe-off and is divided into early, mid, and late-swing phase.
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Early Swing
(acceleration)- begins immediately after toe off. Momentum is increased in its non-weight bearing propulsion forward.
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Mid-swing
(swing through)- The leg continues its swing through until just before heel strike wehn it goes through the late swing, or deceleration.
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Late swing
(deceleration)- slows down foward propulsion, makes a smooth contact with the floor and begins a new gait cycle
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The stance phase is ___% of one gait cycle?
60
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The swing phase is ____% of one gait cycle.
40
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Double limb support
During the first and last 10% of stance in walking, thte body is supported by both lower extremities. This occurs a the beginning of the stance pahse during heel strike for one leg and at the end of the stance phase, just before toe-off, for the other.
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Stride length
is the distance from heel strike of one foot to heel strike of the same foot in one gait cycle.
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Step length
is the distance from heel strike of one foot to heel strike of the other foot in one gait cycle.
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Average Stride length
156 cm or 61 in
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Stride width
the body's side to side movement as weight is shifted from one lower extremity to the other. It is the distance between the midline of one foot at midstance and midline of the other foot at midstance.
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Normal rate of walking?
Just under 60 strides per minute to 101 to 122 steps per minute.
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The body accomplishes a sinusoidal movement in the both vertical and horizontal directions during locomotion through six determinants of gait. Name them
- Pelvic rotation
- Pelvic tilt
- knee flexion at
- Ankle motion
- lateral motion of pelvis
- gait kinematics
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Intial contact
what are the ROM of the hip, knee, and ankle
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Midstance
what are the ROM of the hip, knee, and ankle
- hip is extending
- knee has moved from 15 flexion toward extension
- ankle has moved from 15 plantar flexion to 10 dorsiflexion
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Toe off
what are the ROM of the hip, knee, and ankle
- hip has moved from 10 extension to neutral,
- the knee is in35 flexion,
- and ankle is 20 plantar flexion.
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Swing Phase
what are the ROM of the hip, knee, and ankle
- hip moves from 20 to 30 flexion
- knee moves into 60 flexionand progresses to full extension
- ankle remains neutral
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