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113 Cards in this Set
- Front
- Back
flaccid dysarthria is caused by
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impairment of the LMNs of the cranial or spinal nerves Ex. damage to the PNS
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characteristics of flaccid dysarthria (2)
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-weakness in the speech and/or respiratory musculature
- weakness can result in:(possibly but not all)slow-labored articulation, hypernasal resonance, horse-breathy phonation (most common) |
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what is the neurological basis of flaccid dysarthria (2)
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- damage to the lower motor neurons or 'final common pathway'
- any disorder that disrupts the flow of neural impulses along the LMN that innervate muscles of respiration, phonation, articulation, prosody, or resonance |
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what are 5 confirmatory signs of flaccid dysarthria
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1. weakness (usually see)
2. hyptonia and reduced reflexes (usually see) 3. atrophy (might see-co occur) 4. fasciculations (might see-co occur) 5. progressive weakness with use in some cases (small number of cases) |
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if damage occurs to any of the following or a combination of the following, the motor impulses sent to the muscles for speech will be distorted or stopped completely (6)
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1. trigeminal
2. facial 3. glossopharyngeal 4. vagus 5. accessory 6. hypoglossal |
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trigeminal CN V attaches at the level of the
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pons
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trigeminal cn V is divided into how many branches and what are they called
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1. opthalamic
2. maxillary 3. mandibular (imp for speech) |
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why is mandibular branch the most imp for speech production
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innervates muscles that elevate and lower the jaw
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unilateral damage to the CN V trigeminal nerve has what 4 effects
1. weakness? 2. deveiate? 3. confirmatory sign? 4. speech production? |
1. weakness in the jaw muscles ont he same side as the damage
2. jaw may deviate twoard theaffected sidewhen opened(pusing from both sides) 3. muscle atrophy will occur over time, resulting in asymmetrical appearance 4. minimal effect on speech production (the other side can compensate) |
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bilateral damage to the CN V trigeminal nerve has what 3 effects
1. jaw? 2. which sounds affected? 3. speech rate? |
1. person will have difficulty or will not be able to raise their jaw.
2. wich souds will jaw movement affect the most? - bilabial -labiodental, linguadental, linguaalevolar - vowels, glides, and liquids 3. rate of speech will be reduced |
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can someone produce sound wihtout pushing jaw up??
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no
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sensory affects of bilateral damage to the trigeminal nerve
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no sensation to face causes problems
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what are two major branches of the facial nerve CN VII
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1. cervicofacial branch: innervates lower facial muscles
2. temporofacial branch: innervate upper face |
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lower motor neuron lesion to the facial nerve CN VII
-above the point of division results in: -below the point of division results in: |
above: entire ipsilateral facial weakness
below: muscles innervated by the specific branch will be affected |
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Upper motor neuron lesion:
UMNs of the corticobulbar tract innervate: |
the LMNs of the two branches of the facial nerve
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Facial nerve::
upper face receives _____UMN innervation |
bilateral UMN inneravtaion
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lower face receives UMN
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UMN innervation from teh contralateral side of the brain
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Facial nerve:
what will happen if there is right LMN lesion above the point of division? |
entire right face damage
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what will happen if there is right corticobulbar tract damage
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lower left face damage
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unilateral damage to the facial nerve results in (3)(speech characteristics)
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- mild distortion of bilabial and labiodentals
- flutter of the cheeks - reduced precision of/pa/ for AMRs |
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bilateral damage to the facial nerve (2)
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- distortion or inability to produce bilabials and labiodentals
- slow rate |
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glossopharyngeal nerve CN IX originates at the level of the
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medulla
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the glossopharyngeal nerve CN IX courses out to the _______ innervating the (2)
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courses out to the pharynx innervating the stylopharyngeus and superior pharyngeal constrictors
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the superior pharyngeal constrictors assists in....
- what will test the function of the CN IX |
superior pharyngeal constrictors assist in elevating and opening the upper pharynx (back of throat)- affect articulation
- gag reflex will test the function of CN IX (glossopharyngeal nerve) |
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what is the exact contribution of CN IX glossopharyngeal nerve to speech
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unclear because of close approximation of the vagus nerve but most likely articulation and resonance affected.
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Vagus nerve (X) is very important for
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speech
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vagus nerve (CN X) originates at.... just below....
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originates at the medulla just below the CN IX.
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vagus nerve (CN X) courses near
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CN IX and CN XI
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describe vagus nerve CN X
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long and serves many parts of the body (larynx, intestines, heart, velum)
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what are three important branches of CN X for speech production
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1. pharyngeal branch
2. external superior laryngeal nerve branch 3. recurrent laryngeal branch |
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pharyngeal branch of CN X innervates
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muscles of hte pharynx and soft palate
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pharyngeal branch of CN X is responsible for (2)
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1. pharyngeal constriction
2. palatal elevation and retraction |
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unilateral damage to pharyngeal branch of CN X results in
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the affected side of the velum hanging lower than the unaffected side-> generally does not result in VPI (velo pharyngeal insuficiency)- enough compensation
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bilateral damage of pharyngeal branch of CN X results in
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hypernasality- pressure consonants will be distorted - can't hold in air- inter oral pressure, stops, fricatives, affricates
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external superior laryngeal nerve branch of CN X innervates the
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cricothyroid
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what does the cricothyroid do
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stretches and tenses the VFs, thus controls pitch
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unilateral damage to external superior laryngeal nerve branch of CN X will
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have a mild effect on varying pitch
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bilateral damage to external superior laryngeal nerve branch of CN X will (3)
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1. decreased loudness- maybe
2. increased breathiness- maybe 3. monotone (decreased pitch variation)- most obvious |
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recurrent laryngeal branch of CN X supplies
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motor innervation to all the intrinsic laryngeal muscles except for the cricothyroid
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recurrent laryingeal branch of CN X is important for
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VF adduction and abduction
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unilateral damage to recurrent laryngeal branch of CN X may result in
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on VF being fixed in the paramedian position - causing breathy phonation and decreased loudness (not all patients, some may sound close to normal with compensation)
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bilateral damage to recurrent laryngeal branch of CN X can
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fix both VFs in the paramedian position resulting in inhalatory stridor (still can phonate, not well, breathy, horse)
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accessory nerve (XI) merges with
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vagus nerve
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spinal portions of accessory nerve XI supply
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motor innervation for the sternocleidomastoid and trapezius
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damage to vagus nerve means there is also damage in
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accessory nerve
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hypoglossal nerve (CN XII) provides
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motor innervation for all intrinsic lingual muscles and most of the extrinsic
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unilateral damage to hypoglossal nerve (CN XII) results in 4
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-weakness on the same side as the nerve damage
- damaged side with atrophy - protrusion will deviate twoard the affected side - mild articulatory distortions |
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bilateral damage to hypoglossal (CN XII) will result in (6)
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-bilateral muscle will atrophy and weakness
- reduced ROM-> imprecise articulation - difficulty with pronouncing alveolars and velars |
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UMN innervation of hypoglossal CN XII is contralateral only -> damage to the L UMNs results in
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weakness in the R side of the tongue
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what are 8 etiologies of Flaccid dysarthria?
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1. physical trauma
2. brainstem stroke 3. myasthenia gravis 4. guillain-barre syndrome 5. polio 6. tumors 7. muscular dystrophy 8. progressive bulbar palsy |
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what are three types of physical trauma
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surgical trauma, head injury, neck injury
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physical trauma cuased waht percent of flaccid dysarthria cases
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33
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4 procedures that are at risk
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1. carotid endarterectomy (removal of plaque in artery)
2. cardiac surgery 3. removal of head and neck tumors 4. dental surgery |
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CHI stands for
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closed head injury
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CHI can cause
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blows to the head and/or falls that will also damage the cranial nerves of speech production
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what is CVA
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blood flow to the brain is interrupted
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a stroke in one ofthe brainstem arteries can result in
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damage of the neurons served by that artery
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brainstem stroke: if blood supply is blocked then
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neurons will die
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severity of impairment due to brainstem stroke depends on
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the number of LMNs damaged due to a stroke
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myasthenia gravis affects
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the neuromuscular junction where the LMNs meet muscle tissue
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what are the primary symtpoms of myasthenia gravis
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rapid fatigue of muscle contraction
recovery after rest |
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myasthenia gravis is caused by
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antibodies that damage parts of the muscle tissue that receive acetylcholine
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decrease in ach receptors results in
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the muscle not being able to use all the ach produced by the motor neuron
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with myasthenia gravis, the speech characteristics during PROLONGED speaking tasks: (4)
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- hypernasality
- decreased loudness - breathy voice quality - decreased articulatory precision |
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Guillain- Barre syndrome is
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progressive inflammatory loss of myeline sheath (demyelination) generally int eh PNS
(info transmission) info in nervous system not processed as quickly |
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guillain-barre syndrome can occur after
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some infections and immunizations
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progression of guillain-barre syndrome is
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rapid
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4 early symptoms of a patient with guillain-barre syndreom
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weakness and numbness in limbs early on
flacccid dysarthria and dysphagia |
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recovery rate of people with guillain-barre syndrome?
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recover from this syndrome over a few weeks or months, but 5% die during the acute stages or may have permanent weakness
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polio is
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infectious viral disease
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polio attacks
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cell bodies in LMNs
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polio most often affects
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cervical and thoracic spinal nerves, resulting in respiratory weakness
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if there is respiratory weakness in a person with polio, then the speech characteristics may include: (4)
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- labored inhalation during speech
- shortened phrases - speaking on residual air - decreased loudness |
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in 10-15% of cases of polio...
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LMNs in CN V, VII, IX, and X can also be affected
then person with have problems past respiratory system |
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what are three other causes of flaccid dysarthria
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1. tumors
2. muscular dystrophy 3. progressive bulbar palsy |
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what will tumor do
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will compress on brainstem, neck, or orofacial structure
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what is mucular dystrophy? results in?
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progressive degeneration of muscle tissue
results in weakness of muscles served by cranial nerves |
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prgressive bulbar palsy is a type of? can affect?
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- a type of ALS
- can affect UMNs, but predominantly affects the LMNs |
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with progressive bulbar palsy, if both UMN and LMNs are affected then...
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the person can have a mixed dysarthria
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what are the resonance characteristics of someone with flaccid dysarthria? (5)
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1. hypernasality (test with mirror
2. nasal emission (can't hear) 3. weak pressure consonants 4. shortened phrases- due to inefficiency in air usage 5. resonance deficits primarily reflect bilateral damage to the pharyngeal branch of CNX the first three are the most obvious |
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what are the characteristics of articulation of a person with flaccid dysarthria? (3)
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imprecis consonants
- large range in severity b/c depends on which CN invovled - often the result of damage to the facial and hypoglossal nerves- most serious impact on articulation -bilateral damage to CN VII will impact bilabials and labiodentals and vowels requiring lip rouding |
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bilateral damage to CN XII will have an affect on which phonemes?
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alveolar and any lingual sound
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bilateral damage to the trigeminal can result in difficulty
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elevating the jaw sufficiently to bring the articulators into contact with each other
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what are the phonatory characteristics of a person with flaccid dysarthria?
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phonatory incompetence
- incomplete adduction of the VFs- due to damage to recurrent laryngeal nerve of CN X- breathy, stridor |
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combined presence of what two voice qualities are strong indicators for the diagnosis of flaccid dysarthria?
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hypernasality and breathy voice
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what are the respiration characteristics of a person with flaccid dysarthria? (4)
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- respiration may be a component of flaccid dysarthria if the C and T spinal nerves responsible for innervating the diaphragm and intercostals are damaged
- inadequate amount of subglottic air pressure for speech resulting in: - reduced loudness - shortened phrase lenght -strained voice quality (first two more important) |
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respiration and phonation are closely related, so how do you know if the person has poor respiratory suppor or decrease phonatory competence? (2)
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- have person produce a good cough
- ask person to produce a hard glottal stop |
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if person has a breathy cough and sharp glottal stop then...
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respiratory problem
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if person has a breathy cough and weak glottal stop may indicate
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- possible phonatory problem (adduction minimally)
- may be respiration as well but don't know) |
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what are 4 characteristics of prosody of a person with flaccid dysarthria
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1. monopitch (monotone)
2. monoloudness 3. reduced voice range profile- can't use full scale 4. the combination of reduced loudness and pitch range can occur in other types of dysarthria, thus are not diagstostic markers for flaccid dysarthria |
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what are four types of tasks used to evaluate specific characteristics of flaccid dysarthria?
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- conversational speech sample
- alternate motion rate (AMR) - prolonged phoantion of vowel - speech stress test |
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conversation speech sample tests (4)
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- resonance, articulation, respiration, prosody
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alternate motion rate will show
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slowed rate of phoneme production
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prolonged phonation of a vowel will assess
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voice quality
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speech stress test will assess
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fatiguing of hte speech mechanisms
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treatment of flaccid dysarthria; what is said about oral strengthening tasks?
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- value of these exercises is questionable
- it is suggested that strengthening exercises are most often appropriate for pts with a sever or a mild weakness (rationale: if doesn't help-> at least won't hurt) |
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treatment for resonance deficits: (3)
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surgery
prosthese modification of speech |
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what are two surgery options?
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1. pharyngeal flap
2. teflon injection |
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what is a prostheses
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palatal lift
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what are 6 characteristics of a good candidate for prosthese for treatment of resonance deficit with flaccid dysarthria?
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1. hypernasality is their most serious speech production deficit
2. stable medical condition 3. have enough teeth onto which the lift can be attached 4. no hyperactive gag reflex or significant oral spasticity 5. they have the patience and motivation to use the lift 6. ability to independently insert and remove the device |
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how should speech be modified?
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increase loudness
reduce rate of speech use a more open mouth position during speech (exagerated jaw movement of opening mouth when talk) |
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what are five tasks use for treatment of phonation deficits
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1. pushing and pulling- effortful closure techniques
2. holding breath 3. hard glottal attack (not target, only method of acheiving target) 4. head turning toward the affected area in order to bring paralyzed vocal fold to midline (when not in public) 5. sideways pressure on larynx( push on thyroid cartilage right below jaw bone) 4. |
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what are four tasks used for treatment of prosody
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1. pitch range exercises
2. intonation profiles 3. contrastive stress drills 4. chunking utterances into syntactic units prosody treatment is the same for each motor speech disorder |
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what are pitch range exercises
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patient needs to discriminate bt different pitches (high/low)
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what is intonation profiles
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drawing a line like on a treadmill to the intonation pattern of the phrase like good morning
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what is contrastive stress drills?
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putting stress in certain parts of sentences
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what is chunking utterances into syntactic units?
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breaking up into phrases to help mark places to breath
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treatment for damage to the hypoglossal nerve: traditional articulation treatment (4) first three are best ones
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1. intelligibility drills
2. phonetic placement 3. exaggerating consonants 4. minimal contrast drills |
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what is an intelligibility drill
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child teaches himself how to fix mistake to be more intelligible
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what is phonetic placement
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showing patient how to produce sound by imitating and looking in mirror
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what is exaggerating consonants
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helps improve intelligibility- aka over articulation
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what is minimal contrast drills
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words that are the same except for one sound
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treating respiratory weakness: (4)
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1. correct posture
2. compensatory devices 3. speaking immediately on exhalation 4. cueing for complete inhalation |