Cerebellar dysfunction Flashcards
what could cause cerebellar dysfunction
stroke ~5%
tumor
structural (chari malformation)
toxicity
immune mediated (MS)
trauma
infx or endocrine (hypothyroid)
what contains all axons that transmit info to and from cerebellum
Peduncles
what is the vestibulocerebellum role in mvmt
VOR
gaze + eye mvmt = nystagmus
posture + balance
what is the spinocerebellum role in mvmt
gaze + eye mvmt
postural tone (hypotonia/tremor)
balance + locomotion (ataxia)
coordination (dysmetria/dysdiado)
what is the cerebrocerebellum (neo) role in mvmt
complex, multi jt mvmt (dyssenergia)
motor planning (decomposition)
visually guided mvmt (dysmetria) (dysdiado)
explain motor coordination theory
primary function of cerebellum is to coordinate multi-jt for smooth & fluid mvmt
explain timer hypothesis theory
main site of temporal representation of mvmt (perceptual processing)
explain internal model theory
works via feedforward control when initiating mvmt
list some obvious clinical manifestation if someone has cerebellar dysfunction
ATAXIA
dysmetria (may worsen w inc/dec speed)
dysdiado
decomposition
lack of chekc or rebound during MMT
DTR pendular affect after reflex is elicited
what type of learning is most affected in ppl with cerebellar dysfunction
associative and procedural learning since most reliant on cerebellum
medical management for cerebellar dysfunction
no cure or pharma; rely mainly on PT
The international cooperative ataxia rating scale ICARS is socred from 0-100 with 0 indicating ____ ataxia and 100 indicating ____ ataxia
No signs of; severe
The scale of the assessment & rating of ataxia SARA is similar to ICARS but is quicker to admin.
It’s scored from 0-40 with 0 indicating ____ ataxia and 40 indicating ____ ataxia
No signs of; severe
the prognosis of recovery depends highly on _____ and ____
etiology & extent of lesion
since repetitive fatigue activity worsens posture control what type of practice is best?
distributed practice
low, submax, or max resistive exercises improves muscle fatigue?
submax
should you challenge pt’s with cerebellar dysfunction or prevent muscle fatigue/overwork?
should challenge to promote plasticity
what technique is utilized during PT for cerebellar dysfunction that is often not used with other disorders/disease
Compensation techniques
- decomposition, widen BOS, AD use, minimize distraction
will weighting down a pts affected limb improve or worsen ataxia?
initially improves but then worsens as result of motor feedback that pt is not used to and affects dysmetria
The cerebellum is integral in ______ multi-jt mvmt and ____ mvmt to changes in environment and learning new mvmt patterns
coordinating; adapting
what is an important clinical factor to keep in mind during PT treatment
if impairments are expected to improve or not
*if not expected = compensation
