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Questions and Answers
What constitutes the stance phase of the gait cycle?
What constitutes the stance phase of the gait cycle?
During a normal gait cycle, what percentage does the swing phase typically occupy?
During a normal gait cycle, what percentage does the swing phase typically occupy?
Which term is NOT used to describe a phase in the Ranchos Los Amigos terminology?
Which term is NOT used to describe a phase in the Ranchos Los Amigos terminology?
What is the primary distinction between traditional terminology and Ranchos Los Amigos terminology?
What is the primary distinction between traditional terminology and Ranchos Los Amigos terminology?
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What is meant by double-support in the context of a gait cycle?
What is meant by double-support in the context of a gait cycle?
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Which phase immediately follows heel strike in the traditional gait cycle terminology?
Which phase immediately follows heel strike in the traditional gait cycle terminology?
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In a gait cycle, what is characteristic of the midstance phase?
In a gait cycle, what is characteristic of the midstance phase?
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What component comprises the initial contact in the Rancho Los Amigos terminology?
What component comprises the initial contact in the Rancho Los Amigos terminology?
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How many periods of double support occur in a single gait cycle?
How many periods of double support occur in a single gait cycle?
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Which of the following phases is included in both the traditional and Ranchos Los Amigos terminology?
Which of the following phases is included in both the traditional and Ranchos Los Amigos terminology?
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Study Notes
Gait Cycle Principles
- Gait is the coordinated movement of body segments to propel the body through space
- Lower extremities alternate, supporting and carrying the weight of the head, arms, and trunk
- Body weight distribution: head/arms (25%), trunk (50%), each leg (10%)
- Gait cycle involves periods of double-limb support (both legs) and single-limb support (one leg)
- Body's center of mass is balanced over the supporting limb
- Gait is described using one lower extremity as a reference, following its movements from initial contact to the next contact
Gait Cycle Phases
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Gait Cycle : the time from when one extremity contacts the ground to the next time the same extremity contacts the ground
- Includes stance and swing phases for each lower extremity.
- Stance Phase: the period when the reference leg is in contact with the ground, lasting approximately 60% of the gait cycle; begins when the foot contacts the ground and continues until the same foot contacts the ground again.
- Swing Phase: when the reference leg is not in contact with the ground: approximately 40% of the gait cycle, begins when the toes lift off the ground and ends right before the heel of the same leg touches the ground again.
Gait Cycle Subdivisions (Traditional vs. Ranchos Los Amigos)
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Traditional Terminology: focuses on specific points in time during the gait cycle
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Ranchos Los Amigos (RLA) Terminology: highlights intervals or phases of the activity for each interval within a stage.
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Traditional Terminology (Stance Phase):
- Heel Strike (HS) : beginning of stance phase
- Foot Flat (FF) : sole of the foot touches the ground/floor
- Midstance (MSt) : body is directly over the reference limb
- Heel Off (HO) : heel leaves the ground
- Toe Off (TO) : toes leave the ground
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RLA Terminology (Stance Phase):
- Initial Contact (IC)
- Loading Response (LR)
- Midstance (MSt)
- Terminal Stance (TSt)
- Preswing (PSw)
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Traditional Terminology (Swing Phase):
- Acceleration (Acc)
- Midswing (MSw)
- Deceleration (Dec)
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RLA Terminology (Swing Phase):
- Initial Swing (ISw)
- Midswing (MSw)
- Terminal Swing (TSw)
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Description
This quiz explores the principles and phases of the gait cycle, detailing the coordinated movements of the body during locomotion. It covers key concepts such as weight distribution and the different phases of stance and swing for the lower extremities.
