Cerebellum Lesions Flashcards
What is the purpose of the cerebellum?
Influences the ability to directly or indirectly execute smooth, accurate and controlled movements.
Cerebellar lesions can affect what?
Archicerebellum, spinocerebellar, neocerebellum
Archicerebellum impairments
central vestibular symptoms, gait and trunk ataxia, little change in tone.
Central vestibular symptoms
occular dysmetria, poor eye pursuit, vestibular ocular reflex (VOR) dysfunction, impaired hand eye coordination. **nystagmus might be present. **
Gait trunk ataxia
poor postural control and WBOS
Spinocerebellum impairments
Hypotonia w/ weakness and fatigue
truncal ataxia
ataxic gait
Hypotnia w/ weakness and fatigue issues…
primary issue is timing of muscles activation
Truncal ataxia
disequilibrium, static posture tremor, increased sway and WBOS **pt has complication w/ standing w/ eyes closed. **
Ataxic gait
unsteady gait, increased falls, decreased step length and increased step width. loss of muscle coordination, high guard position
Neocerebellum impairment
Intention tremor
Dysdiadochokinesia
Dysmetria
intention tremor
tremor when trying to reach for something (performed task)
Dysdiadochokinesia
impaired rapid alternating movement (RAM) especially w/ increased speed.
Dsymetria
Hypermetria (overshoot), hypometria (undershoot.
How do you treat dysmetria?
PNF using dynamic reversal w/ careful graded resistance.
Can assist patient with better control, because pt lacks control of speed, high speed isokinetic interventions are contraindicated.
dyssynergia
abnormal timing, coordination, sequencing.
asynergia
loss ability to associate muscles together for complex movements
errors in timing
related to perceptual task
asthenia
generalized weakness; fixation or position holding
dysarthria
speech articulation “scanning speech” one word at a time
hypotonia
difficulty with postural control of proximal (axial) muscles especially w/ acute cerebellar lesions
cognition
information processing and attention deficits.
emotional dysregulation
change in emotional behavior
rebound phenomenon
loss of check reflexes, isometric resistance is removed.
anticholinergic drugs
used to control tremors (can cause visual disturbances)
amantadine
enhances dopamine release
selegiline
used in early stages to slow progress of disease
