Exam 3 - Ataxic Dysarthria Flashcards
neurological basis of ataxic dysarthria
often d/t damage to cerebellum or its neural pathways
cerebellar =
ataxia
ataxic dysarthria results in:
speech errors that are primarily articulatory and prosodic, giving speech unsteady, slurred quality
ataxia means
widespread incoordination
greek - lack of order
purpose of cerebellum
coordinates timing and force of muscular contractions
the cerebellum processes
sensory info from all over body and integrates it into execution of movement
the cerebellum is attached to
the brainstem
cerebellum communicates with rest of CNS through
three bundles of neural tracts called cerebellar peduncles
inferior peduncle
receives peripheral sensory signals
middle peduncle
receives cortical signals
superior peduncle
sends motor related signals back out to the cortex as well as the extra pyramidal system
causes of ataxic dysarthria
damage to cerebellum
degenerative diseases
stroke
toxic metabolic conditions
traumatic head injury
tumor on or near cerebellum
damage to cerebellum typically causes
difficulties coordinating voluntary movements
ataxic dysarthria: degenerative diseases
autosomal dominant cerebellar dysfunction of late onset
idiopathic sporadic late onset cerebellar ataxia
ataxic dysarthria: degenerative diseases types
friedreich’s ataxia
olivopontocerebellar atrophy
multiple sclerosis
friedreich’s ataxia
progressive hereditary disease affecting spinal cord as well as cerebellum
olivopontocerebellar atrophy
progressive cerebellar disorder that runs in families
multiple sclerosis
usually part of a mixed dysarthria
ataxic dysarthria: stroke
blockage to arteries serving cerebellum, ruptured aneurysms, and arteriovenous malformations can cause ataxic dysarthria
most cerebellar strokes result in the following “cerebellar sings”
limb ataxia
problems w balance
visual deficits
ataxic dysarthria
ataxic dysarthria: toxic-metabolic conditions
most treatable
resolves as toxic levels decrease
non speech symptoms of ataxic dysarthria
gait abnormalities
nystagmus
dysmetria
titubation
hypotonia
intention tremor/terminal tremor
speech characteristics of ataxic dysarthria
primarily disorder of articulation and prosody
poorly coordinated movements
problems controlling timing/force for speech
slurred, monotonous articulation
scanning speech
problems controlling timing/force for speech NOT problem w
execution