Impairments: Voluntary Mvmt: Exam 1 Flashcards
Think about this!!!
Weakness
Dyscoordination
- related to which health cond, disorder or disease?
- related to which activity limitations?
When Dr. Cohen says “Coordination”
You say…..
Cerebellum!!!!!!!
*NOTE: also when he says “Dyscoordination” you say Cerebellum!!!
What is Weakness?
aka Asthenia
- Inability to gen. normal lvls of mm force
- aka Asthenia
Weakness leads to secondary changes in muscle
what are they?
Loss of type I and type II mm fibers
type I–slow twitch
type II–fast twitch
Weakness is a predictor of _____ ______ following stroke
Poor Outcome following stroke
Weakness may do 3 things:
- INC fall risk
- INC energy exp. during gait
- foster activity intolerance
Weakness
Fosters activity intolerance
leads to….
- Sedentary lifestyle
- DEconditioning
- Disuse atrophy
- DEC in ADL status
3 other problems that present as weakness:
- Bradykinesia
- Akinesia
- Apraxia
Bradykinesia or….
EXTREME slowness of mvmt
Akinesia or…
Inability to initiate mvmt
*getting the mvmt started
Apraxia or…
- inability to perform purposeful mvmts ALTHOUGH there are NO sensory or motor impairs.
-
PROBLEM W/ MOTOR PLANNING
- If challenged to do it—-> becomes more diff.
-
PROBLEM W/ MOTOR PLANNING
ex. Dr. Cohen’s pt who was sitting in chair and stood up, but when asked to “get up” —–could NOT do it
Limit to Strength Testing
Traditional strength testing
- Trad. strength testing assumes person being tested has normal motor control
- remember if it is NOT normal—–> DESCRIBE what you see
Limits of strength testing….
if the pt does not have normal motor control….
Standard mm tests are not valid!!!
Strengthening acts in people w/ CNS probs is STILL beneficial in 3 ways:
- Improves alpha-gamma coactivation
- uses neural pathways
- results in peripheral strength gains
Strengthening w/ CNS patho is still beneficial, but improvements in strength are NOT assoc’d w/ INC’d____________
NOT assoc’d w/ inc in mm tone
strengthening beneficial in CNS patho?
Strengthening programs appear to be effective in improving strength across dx groups
4 Interventions for Weakness
- PREs
- Isokinetics
- Biofeedback
- FES
Interventions for Weakness
Absence of active mvmt
0 or 1 on MMT scale
use….
- Facilitation techniques
- utilize stretch reflex path. for autogenic facilitation
- tapping, vibrating, lt. touch
- Modify functional task/environment
Autogenic Facilitation
0 or 1 MMT
Process of inhibiting the muscle that generated a stimulus (palpable contraction), while providing an excitatory impulse to the Antagonist muscle
Interventions for Weakness
Lack anti-gravity power
2 or 3 on MMT scale
- Use gravity eliminated pos’s
- begin PREs
- functional tasks
NOTE: remember w/ gravity eliminated put them in an alternative position and you support the limb during activity!!!
Interventions for Weakness
Lack full mm power
<4 on MMT scale
- Resistance
- PREs w/ wts
- manual resist. ex’s
- Consider body pos.
- use trunk and extremity mm power
- endurance
Strength training considerations and transfer effects?
- Exercise is:
- action-specific
- velocity-specific
- angle-specific
***transfer effects typ. not great**
Research: Transfer of Training
Weiss, A., et al (2000)
High intensity strength training improves strength and functional performance after stroke
Exercise training x12 wks
- Findings:
- mm strength gains
- rep’d chair stand times DEC’d
- stair climb time DEC’d (not sig.)
- 12% improve MAS
- 12% improve Berg
What does the research say:
High-int. strength training
CAN improve strength and balance
What does research say:
Task-oriented strength training
improves task performance and inc’s strength in the relevant mm’s
improves mm extensibility and stiffness
what does research say:
strength training and hypertonia
CAN have effect on reducing hypertonia in spastic muscles/mm groups
PNF or
Proprioceptive Neuromuscular Facilitation
PNF orig. developed for what?
combat weakness assoc’d w/ polio
Polio==LMN disorder
UE scapular and pelvic diagonal PNF patterns:
improve what?
- Specific mvmt patterns and tech’s to improve:
- Flexibility
- Strength
Principles of PNF:
Mass Mvmt
- Mass mvmt is characteristic of NORMAL motor activity
- brain knows only of mvmt
-
Mass mvmt req’s 2 things:
- tissue shortening
- tissue lengthening
Neurodevelopmental Treatment
NDT
Bobaths 1960s
challenges what?
- Challenges trunk mm’s and prox. mm stability
-
use of resistance NOT advocated
- causes abnorm. mm recruitment
-
use of resistance NOT advocated
- Has Functional relevance
Constraint Induced Mvmt or
CIM
aka
“Forced Use”
of the affected limb
Constraint Induced Mvmt: CIM
“Forced Use”
Taub and Wolf, 1990’s
- uses motor learning principles to INC active mvmt and function in UE
- restricts mvmt of unaffected side
Specific strengthening ideas?
Gen UE/LE weakness
- Gen. weakness—>
- multiple major mm groups
- multijoint mvmts
- BIG, COMPLEX mvmts
Specific strengthening ideas?
DF weakness
Hip flexor weakness
- address WHERE thes motions/mm’s will be NEEDED and treat THERE
- keep it functional
Probs w/ coordination arise from where?
- DCML
- Cb
- afferent and efferent tracts
DYScoordination is a problem w/ _______ and _______ of mvmt
Timing
Amplitude
*manifests in sev. ways
Ataxia or
Drunken sailor gait
Gen. term used to describe abnormal coordination
Ataxia
Ataxia
abnorm. coord.
demonstrated by deficits in…….
speed
amp. of displacement
directional accuracy
force of mvmt
Dysmetria or …
problem w/ distance
dys=problem
metria=distance
ex. putting pen cap onto pen
Dysmetria
over/undershooting
Inaccurate amp. and timing of mvmt
==> OVERshooting (hypermetria) OR
UNDERshooting (hypometria)
In Dysdiadochokinesia we NEED smooth reversal of agonist/antagonist
They LACK this
Dysdiadochokinesia
diff. performing something
Diff. performing rapid alternating mvmts
mvmts are clumsy, slow
- TESTS:
- sup/pro forearms fast
- DF/PF ankle fast
oscillatory mvmt due to alternating contractions of agonists and Antagonists
Tremors
Tremors
oscillatory mvmt due to alternating contractions of agonists and Antagonists
Intention or voluntary Tremor
occurs during movement of limb
absent @ rest
coordination problem
This tremor is ABSENT @ rest
coordination problem
Intention or voluntary tremor
Resting Tremor
Present @ rest
NOT typ assoc’d w/ dyscoordination
This tremor is PRESENT @ rest
NOT assoc’d w/ dyscoord.
Disappears w/ voluntary mvmt
Resting tremor
Resting tremor typ. assoc’d w/
Basal gang
higher brain centers
Examining Coord:
Finger to Nose test
- indiv tries to touch index finger of examiner w/ outstretched arm
- OBSERVE FOR:
- delay in mvmt initiation
- terminal tremor (appears when they get there)
- dysmetria (over/undershoot)
- NOTE: can be done in standing to ID diff w/ posture stabilization
Examining Dyscoord:
Heel to Shin Test aka
Frankel’s Test
- should be smooth
- Pt places heel of one leg on shin of other, near knee, slides heel down shin towards foot then reverse