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Acquired Apraxia of Speech (AOS) With Complete Solutions Latest Update
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Acquired Apraxia of Speech (AOS) With Complete Solutions Latest Update
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Acquired Apraxia of Speech (AOS) With CompleteSolutions Latest Update
What does "Praxis" mean?
From Greek - "action"
Refers to volitional mvmts
Praxis is comprised of three components:
1) Ideation - the ability to conceptualize a new or different activity
2) Motor Planning - the ability of the brain to organize and sequence novel motor actions
3) Execution - the ability to perform motor actions
What is AOS?
A neurologic speech disorder that reflects an impaired ability to plan or program sensorimotor commands necessary for
directing movements that result in phonetically and prosodically normal speech.
General or specific information regarding the sensorimotor specifications required for intended speech movements
either...
1) cannot be accessed
2) is no longer available
,Don't know whether is because of 1) or 2) - cannot be easily tested
The clinical features of AOS convey the impression that...
a message has been correctly formulated but that its physiological expression has been inefficiently or improperly
organized or controlled, although not because of problems with basic motor abilities.
AOS almost always results from pathology in the
left cerebral hemisphere.
AOS can occur in the absence of...
physiologic disturbances associated with the dysarthrias
and in the absence of disturbance in any component of language
"pure" AOS is actually...
RARE
the majority of pts with AOS also have aphasia
What are the Etiologies of AOS?
-Usually caused by stroke
-Sometimes caused by tumor or trauma
, -Although uncommon, can be a sign of a degenerative CNS disease (PPA, Creutzfeldt-Jacob disease)
patients with AOS usually have damage to the...
left frontal or parietal lobe or left subcortical pathways and structures associated with the direct and indirect activation
pathways
Nonspeech characteristics of patients with AOS include..
Varying degrees of right sided weakness and spasticity
May co-occur with limb apraxia and/or nonverbal oral apraxia
What is the Motor Speech Programmer (MSP)?
A network of widespread structures and pathways within the central nervous system that control motor planning and
programming for speech
What are the structures and pathways included in the MSP?
-Left hemisphere language areas
-Basal ganglia control circuit
-Cerebellar control circuit
-Thalamus
-Limbic system
-Some right hemisphere areas
Functions of the MSP in mature speakers include..
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