Dysarthria assessment Flashcards
Differentiating between dysarthria, AOS, and aphasia
- Are speech and oral mechanisms related to neuromuscular execution?
- Are all sub-system components affected?
- Are deviant speech characteristics consistent and not influenced by linguistic variables?
- Does the patient also have physiological impairments, eg. paralysis, paresis, ataxia, involuntary movements?
- Is their speech affected by word length?
Differentiating between dysarthria types
- Medical information, including aetiology
- Speech characteristics
- Oromotor findings
Establishing diagnostic possibilities if speech is abnormal (7)
- Is the problem neurological?
- Recently acquired or longstanding?
- Is it an MSD or another neurological communication disorder, eg. aphasia
- If neurologic and MSD, is it a dysarthria or AOS?
- If dysarthria, what type?
- Localised to where?
- How severe?
Traditional components of dysarthria assessment (4)
- Case history
- Neuromuscular assessment (OPE)
- Perceptual assessment of speech characteristics
- Assessment of intelligibility
Additional components of dysarthria assessment (3)
- Acoustic analysis
- Functional communication assessment
- Psychosocial impact/QOL
Possible case history topics for dysarthria
- Onset and course (eg. when, fluctuate, meds)
- Associated deficits (eg. swallowing, emotions, weight)
- Patient’s perception (eg. appearance/feeling of face, describe speech,
- Consequence (eg. intelligibility, repeat, participation)
- Management (eg. strategies, SP in past, frustrating)
- Awareness of diagnosis (eg. does doctor know, have they been provided with info)
Functional/informal assessment of dysarthria
- Role play
- Observation during daily tasks with varying speech demands
- Over the phone/skype
Assessment batteries for psychosocial impact of dysarthria
- Dysarthria Impact Scale
- Quality of Life in the Dysarthria Speaker
- Semi-structure interviewing
- Other tools: AusTOMS, social network analysis, checklists, standardised QOL scales (eg. stroke impact scale, WHO-QOL), self-efficacy scales, visual analogue scales
Assessing environmental factors in dysarthria
Environmental checklist/inventory
Observation and assessment across different contexts
- Noise
- Proximity/distance
- Lighting
- Group vs 1:1
- Familiarity of listeners
- Environmental supports/technology
Identify barriers and facilitators
Assessing intelligibility in dysarthria
- Primary measure of disability and is an index of severity
- Speech intelligibility = words understood/words spoken x100
- Standardised intelligibility assessments: single words vs sentences (ASSIDS)
- Speech sampling: conversation, reading aloud, picture naming
- Informal/functional tasks: eg. over the phone, large proximity, background noise
Assessment of Intelligibility of Dysarthric Speech (ASSIDS/AIDS) - use and limitations
Objective means of measuring intelligibility and speaking rate of dysarthric individuals
- Quantifies single word intelligibility, sentence intelligibility and speaking rate
- Record speaker producing 50 words, listener judges by multiple choice formate or transcription format, results are compared
- 22 sentences recorded, listener transcribes sentences, measure number of words correctly transcribed and duration of sample
Limitations
- Not diagnostic
- Requires judges
- Lacks norms
- Time consuming
- Reliability
What is intelligibility vs comprehensibility
Intelligibility = degree to which the acoustic signal is understood by the listener
Comprehensibility = extent to which the listener understands the utterances produced
Assessing comprehensibility in dysarthria
- Intelligibility does not = understanding, not the best measure?
Clinical outcome assessments of dysarthria (4)
- Patient-reported outcome (PRO): eg. Dysarthria Impact Scale
- Observer-reported outcome (ObsRO): eg. Communication Effectiveness Survey completed by communication partners
- Clinician-reported outcome (ClinRO): eg. ‘speech’ item in disease severity scale, UPDRS
- Performance outcome (PerfO): acoustic outcomes from set tasks
Complexity of speech tasks
- Speech tasks can be cognitively demanding, metrically complex, or both
- Low cog load = sustained vowel - automatic connected speech - unprepared monologue = high cog load
- Eg. Poor performance on a motor only task like sustained vowel means it’s less of a language cog/problem and more motor