Week 7 Flashcards
What are the key ingredients for necessary ROM?
• Neutral hip extension for standing; Hip extension for gait
• Neutral knee extension for standing; neutral extension to
moderate knee flexion for gait
• Slight DF for standing; max DF and significant PF for gait
What are the key ingredients for necessary force production?
• Extensors in standing, extensors (primarily PFs) during
stance in gait, flexors for swing
• Lack of ROM increases need for force production
What are the key ingredients for facilitating improved upright posture?
- Necessary range of motion
- Necessary force production
- Sensory systems
- Perception
- Cardiovascular/pulmonary systems
What are key components in the sensory systems that facilitate improved upright posture?
- Vision
- Vestibular
- Somatosensation
What are the activities to facilitate upright posture?
- Elevated sitting
- Kneeling
- Half-kneeling
- Static standing
- Standing + controlled mobility
- Standing + cognitive task
Progress from with UE support to without
Where do we start when trying to help a patient facilitate upright posture?
Supported standing. Mechanically or with people
What is the sequence of motor task requirements?
- Mobility
- Stability
- Controlled mobility
- Skill
What is the goal of forced use activities in standing?
Prevent learned non-use of involved side and over use of non-involved side
What are the characteristics of forced use activities?
• Can actually be started in sitting… How?
• Good closed chain activity to increase activity in LE
• Many ways to gradually progress to more use of
affected LE
• Need to provide or facilitate stability to support these
What are the key points of control for standing(places that the therapist might have to help for control)?
- Lower leg
- Thigh
- Hip/lower trunk
- Head, arms, trunk
What are some pre-gait activities to help facilitate upright posture and gait?
- Isolated practice of stance
- Isolated practice of swing, forward and backward
- Turns
- Regression of UE support
- Regression of therapist control
What is the presentation of gait following neurological impairments?
- SLOW
- Fall risk
- Laborious
- Lack of stance stability
- Poor swing limb clearance
- Lack of normal weight shift/weightbearning
- Compensatory
- Reliant on UE support
What are the risks resulting from altered gait?
- Additional impairments
- Potential musculoskeletal sequalae/problems
- Increased energy expenditure
- Falls
- Activity limitations and participation restriction
- Stigma
- Decreases in QOL
What are the characteristics of the stance phase of gait in patient with a neurological dysfunction?
• Instability of stance is COMMON in neuro
diagnoses/disease
• Requires proximal AND distal stability (esp. plantarflexors in mid to terminal stance)
• Often overlooked or not understood
• Not often treated correctly do to lack of understanding
What are the characteristics of the swing phase of gait in patient with a neurological dysfunction?
- Most commonly identified, described, and addressed
- Greatly dependent on the stance phase
- Fairly easy to compensate for distal impairments of swing phase
- An orthotic solution often does not completely reestablish swing limb clearance
Swing depends on ___
Swing depends on stance
What are the functional categories of pathological mechanisms of gait?
- Deformity
- Muscle weakness
- Sensory Loss
- Pain
- Impaired Muscle Control
What is a deformity?
Lack of sufficient passive mobility and not being able to achieve normal postures and ROM necessary for standing or walking
What is the most common cause of a deformity?
Contracture
What causes a contracture?
Structure change in connective tissue component of muscles
• Elastic
• Rigid
What are some of the deformities we see in stance?
- PF contracture (most common in patients with neuro disease)
- Knee flexion contracture
- Hip flexor contracture
- Adductor contracture
What are some of the deformities we see in swing?
- PF contracture(most common in patients with neuro disease)
- Knee flexion contracture
- Adductor contracture
What does R1 and R2 being really far apart indicate?
That there is some form of hypertonicity present
What parts of the stance phase does a PF contracture disrupt?
- Initial contact
- Mid stance
- Terminal stance
What does a knee flexion contracture in stance result in?
- Increased energy expenditure
- Abnormal IC
- Mid and terminal stance will be affected
What does a hip flexion contracture in stance result in?
- Mid and terminal stance are greatly affected
Pre-swing won’t be accomplished
What does an adductor contracture in stance result in?
- Abnormal forward foot placement/line of progression
What does a PF contracture in swing result in?
- No neutral DF in initial swing, mid, and terminal swing
What does a knee flexion contracture in swing result in?
Mostly impacts ability to achieve knee extension in terminal swing. Step will be shorter
What does an adductor contracture in swing result in?
Results in a decreased BoS, and swinging limb will be too close to the stance limb
What is the primary problem we think of when talking about sensory loss during gait?
Problems with proprioception or kinesthesia
What do problems with proprioception result in during gait?
- Inconsistent gait pattern
- Intact motor – substitutions for lost sensation
- Impaired motor + sensory loss = inability to substitute
What are balance disorders in gait a consequence of?
Both motor control and/or sensory dysfunction
Reactions to pain can cause what during gait?
Deformity and muscle
weakness
• Deformity: resting postures
• Muscle weakness: reduced activity, protective reflex
What is muscle weakness?
Weakness and/or insufficient recruitment or activation
What are the possible origins of muscle weakness?
- Upper motor neuron lesion
- Lower motor neuro lesion
- Muscle pathology
What are the things we should be looking at in the presence of muscle weakness?
- MMT
- Muscle endurance
- Lever length
What does quad weakness in stance result in?
Hyperextension early in stance
(IC or LR); inability to accomplish LR
What does PF weakness in stance result in?
Extensor thrust in MSt to TSt
OR excessive ankle DF, and knee flexion throughout
What does hip extensor weakness in stance result in?
Excessive hip flexion at IC
and LR
What does hip abductor weakness in stance result in?
Contralateral pelvic drop MSt
What does anterior tibialis weakness in stance result in?
Foot slap at LR
What does anterior tibialis weakness in swing result in?
Flat foot or forefoot IC; decreased foot clearance throughout swing
What does knee flexor weakness in swing result in?
Decreased knee flexion in MSw to TSw
What does knee extensor weakness in swing result in?
Doesn’t achieve full extension at TSw
What does hip flexor weakness in swing result in?
Difficulty initiating PSw and ISw (lack of balance between flexors)
What is the bottom line of muscle weakness during swing?
Poor limb clearance
Impaired motor control usually happens in those with what type of lesion?
Upper motor lesion
Impaired motor control is a combination of…?
- Muscle weakness
- Impaired selective control
- Emergence of primitive locomotor patterns
- Spasticity
What are the characteristics of torque production after stroke?
• Decrease in maximum voluntary torque
• Other aspects of torque production are disordered after stroke:
- Decreased speed in torque generation
- Selective muscle weakness at shortened range
• So what?
- Target strengthening of muscles in shortened lengths to promote recovery
- Speed/Power has to be trained
What is the dynamic systems theory?
Movement emerging out of constraints on the system
• Individual
• Task
• Environment
What are the gait clinical presentations in patients with CVA and TBI (unilateral weakness)?
- Stance instability
- Swing limb clearance impairment
- Impaired balance, impaired or absent sensation
- Decreased walking speed
- Increased energy expenditure
- Spasticity
- Decreased selective motor control