1 - Typical Gait Patterns Flashcards
What features are identified in the Sagittal plane? (3)
- Stride length
- Cadence
- Speed
What features are identified in the Frontal plane? (1)
Size of the Base of Support
What features are identified in the Transverse plane?
Foot Progression Angle
Define a Stride.
One cycle of walking is a stride (the time and distance between the heel contact of one foot and that of the same foot)
Each cycles of walking is composed of how many steps?
Two (the time and distance between the heel contact of one foot and that of the opposite foot.
Define Cadence
The number of steps taken per minute.
What is the size of the base of support also called?
stride width or interfoot distance
Define Stride Width
the distance between the middle of the right foot and middle of the left foot in phases of double limb support.
In adults, what does stride width vary from?
3-9cm
Define Foot Progression angle
The angle between the line of progression and the alignment of the second ray of the foot.
In adults, the foot progression angle is
approximately 7 degrees of out-toeing (positive foot progression angle)
Why do children have greater variability in foot progression angle?
because of differences in tibial torsion and femoral antetorsion.
Usually prepubescent children have (LESS/MORE) out-toeing than post-pubescent children.
Usually prepubescent children have LESS out-toeing than post-pubescent children.
Children around 4 years of age have _ degrees of out-toeing while children around 16 years of age have _ degrees of out-toeing.
2 and 7
What are the four groups of phases of walking?
- Weight Acceptance
- Single Limb Support
- Early Swing Limb Advancement
- Late Swing Limb Advancement
During phases of weight acceptance, what is primarily happening? (2)
- the body’s weight is transferred to the reference limb.
2. shock absorption is important during weight acceptance to ensure efficient energy transfer.
Weight acceptance phases include:
- Initial Contact
2. Loading Response
What is primarily happening during phases of single limb support? (3)
- The body passes over a stationary foot.
- During these phases a single limb supports the body.
- The body moves in front of the reference limb.
Single Limb Support phases include:
- Midstance
2. Terminal Stance
During phases of Early Swing Limb Advancement, what is primarily happening?
- the reference limb generates momentum through forward propulsion
What two steps are required to advance the swing limb?
- Initially, this involved pushing off the surface
2. followed by limb clearance strategies (rapid flexing of the reference limb)
Early Swing Limb Advancement phases include:
- Preswing
2. Initial Swing
During phases of Late Swing Limb Advancement, what is primarily happening?
the reference limb is decelerated
Late Swing Limb Advancement phases include:
- Midswing
2. Terminal Swing
What are the 8 phases of gait?
- Initial Contact
- Loading Response
- Midstance
- Terminal Stance
- Preswing
- Inital Swing
- Midswing
- Terminal Swing
What is happening during Initial Contact
Foot contacts the ground
What is happening during Loading Response?
Body weight is transferred to the reference limb and shock is absorbed on a flexed limb.
What is happening during Midstance?
Body moves over a station foot and balance on one foot is maintained.
What is happening during Terminal Stance?
Body progresses past the stationary foot and balance is maintained.
What is happening during Preswing?
Generation of momentum for forward propulsion for swing limb advancement.
What is happening during Initial Swing?
Clearance of swing limb.
What is happening during Midswing?
Deceleration of limb.
What is happening during Terminal Swing?
Extended limb for step length and preparation for loading.
How many critical events occur at the ankle, knee, and hip?
Ankle: 6
Knee: 4
Hip: 4
What 6 critical events occur at the Ankle?
- Heel first contact.
- Controlled Ankle Plantarflexion
- Controlled Tibial Advancement
- Controlled Ankle Dorsiflexion with heel rising
- Rapid Ankle Plantarflexion
- Dorsiflexion to Neutral
What 4 Critical Events occur at the Knee?
- Controlled Knee Flexion
- Passive knee Flexion to 40 degrees
- Maximum knee flexion to 60 degrees
- Knee extension to 0 degrees
What 4 Critical Events occur at the Hip?
- Maintenance of Hip Stability
- Trailing Limb Posture
- Hip Flexion to 15 degrees
- Hip Flexion to 25 degrees
What Critical Events happen during Initial Contact?
- Heel first contact.
What Critical Events happen during Loading Response?
- Controlled ankle plantarflexion
- Controlled knee flexion
- Maintenance of hip stability
What Critical Events happen during Midstance?
- Controlled tibial advancement (ankle is moving from plantarflexed to slightly dorsiflexed)
What Critical Events happen during Terminal Stance?
- Controlled ankle dorsiflexion with heel rising
2. Trailing limb posture (hip extension)
What Critical Events happen during Preswing?
- Rapid ankle plantarflexion (drives knee forward into..)
2. Passive knee flexion to 40 degrees
What Critical Events happen during Initial Swing?
- Maximum knee flexion to 60 degrees
2. Hip flexion to 15 degrees
What Critical Events happen during Midswing?
- Dorsiflexion to 0
2. Maximum hip flexion to 25 degrees
What Critical Events happen during Terminal Swing?
- Knee extension to 0 degrees
At Initial Contact, what are the kinematics of the Ankle?
0 - Neutral
At Initial Contact, what Muscle is activated at the Ankle?
Tibialis Anterior
At Initial Contact, what are the Kinetics at the Ankle?
GRF is Posterior
At Initial Contact, what Critical Event is happening at the ankle?
Heel first contact
At Initial Contact, what are the Kinematics at the Knee?
0-5 flexion
At Initial Contact, what Muscle is activated at the Knee?
Quadriceps
At Initial Contact, what are the Kinetics at the Knee?
GRF is Posterior (plantar moment)
At Initial Contact, what are the Kinematics at the Hip?
20 flexion
At Initial Contact, what are the Muscles activated at the hip?
Gluteus Maximus, Hamstrings
At Initial Contact, what are the Kinetics at the Hip?
GRF is anterior
At Initial Contact, what are the Kinematics at the Pelvis?
5 forward rotation
At Initial Contact, what are the Muscles activated at the Pelvis?
Gluteus Medius
At Initial Contact, what are the Kinematics at the Trunk?
Erect
At Initial Contact, what are the Muscles activated at the Trunk?
Trunk Extensors
At Loading Response, what are the Kinematics at the Ankle?
5 PF
At Loading Response, what are the Muscles activated at the Ankle?
Gastroc-soleus
At Loading Response, what are the Kinetics at the Ankle?
GRF is Posterior (plantar moment)
At Loading Response, what are the Critical Events at the Ankle?
Controlled Ankle Plantarflexion
At Loading Response, what are the Kinematics at the Knee?
15 flexion
At Loading Response, what are the Muscles activated at the Knee?
Quadriceps
At Loading Response, what are the Kinetics at the Knee?
GRF is Posterior
At Loading Response, what are the Kinematics at the Hip
20 flexion
At Loading Response, what are the Muscles activated at the Hip?
Gluteus Maximus, Hamstrings
At Loading Response, what are the Kinetics at the Hip?
GRF is Anterior
At Loading Response, what are the Critical Events at the Hip?
Hip stability
At Loading Response, what are the Kinematics at the Pelvis?
5 forward rotation
At Loading Response, what are the Muscles Activated at the Pelvis?
Gluteus Medius
At Loading Response, what are the Kinematics at the Trunk?
Erect
At Loading Response, what are the Muscles Activated at the Trunk?
Trunk Extensors
At Midstance, what are the Kinematics at the Ankle?
5 dorsiflexion
At Midstance, what are the Muscles Activated at the Ankle?
Gastroc-soleus
At Midstance, what are the Kinetics at the Ankle?
GRF through joint
At Midstance, what are the Critical Events happening at the Ankle?
Tibial Advancement