4 general causes of abnormal gait
Decreased joint motion
Weakness
Pain
Impaired motor control
Impaired motor control includes
Lack of selective muscle control
Mass flexor and extensor patterns
Penalties related to abnormal gait (10)
Decreased shock absorption
Increased energy expenditure
Decreased preparation for swing
Decreased preparation for stance
Decreased limb advancement
Decreased FWD progression
Decreased stability
Decreased stride length
Decreased foot clearance
Increased soft tissue stress/strain
Weakness in DF are shown where
Loading response
All Swing phases
PF weakness is shown in
Mid and terminal stance
Invertor weakness is shown in
Loading response
Mid and terminal stance
Excessive PF in terminal swing - initial contact potential causes
DF weakness
Calf tightness/contracture
Excessive PF initial contact penalty in initial contact
Decreased stance phase progression (lack of heel rocker)
Excessive ankle PF in midstance-terminal stance causes and penalty
Calf tightness/ contracture
Decreased FWD progression (lack of ankle rocker)
Excessive ankle PF in midstance-terminal stance compensatory
Hip and knee extensor weakness
Push body forward as opposed to hip and knee extension pulling body forward
Compensatory strategies to augment FWD progression in midstance - terminal stance
Knee hyperextension
Midfoot pronation
Early heel raise and elevated center of mass