Neurology Flashcards
tremor stiffness slowness balance problems gait disturbance in question stem --- most likely diagnosis?
Parkinson disease
symptoms of Parkinson disease
Bradykinesia - / hypokinesia/ akinesia
- limb bradykinesia
- loss of facial expression
- loss of arm swing
- difficulty with fine movement, “micrographia”
Rigidity (stiffness)
- cogwheeling
Tremor
- resting tremor 4-6Hz, suppressed by initiating movement
Trouble turning in bed Trouble opening jars Shuffling gate Trouble rasing from a chair Glabellar Tap difficulty walking heel-to-toe
Late symptoms of Parkinson disease
- Postural instability (e.g. pull test)/ frequent falls
- cognitive impairment / dementia/ psychotic symptoms/ depression
- sleep disturbance - daytime hypersomnolence + nocturnal akinesia
- autonomic dysfunction (GI, orthostatic hypotension, excessive sweating)
DDx of tremor
- essential tremor
- hyperthyroidism
- drug induced (e.g. beta agonist)
- cerebellar disorder
DDx of Parkinsonian syndrome
- Alzheimer’s
- Multiple cerebral infarcts
- drug induced (e.g. metaclopramide, antipsychotics, lithium)
- multiple system atrophy
- progressive supranuclear palsy
MDS clinical diagnosis of Parkinsonism
bradykinesia plus rest tremor or rigidity
clinical criteria of clinically established PD
All of the 3:
1 ) No absolute exclusion criteria
2) = or > 2 supportive criteria
3) No red flags
Clinically Probable PD diagnostic criteria
- Absence of absolute exclusion criteria
2. Presence of red flags counterbalanced by supportive criteria
Absolute exclusion criteria of PD
- Cerebellar sign
- Supranuclear gaze palsy
- Established diagnosis of behavioural variant fronto-temporal dementia
- Parkinsonism restricted to the lower limbs only for >3 yrs
- Tx with an antidepaminergic or w/ dopamine-depletion agent
- Absence of response to levodopa
- Sensory-cortical loss
- No evidence for dopaminergic deficiency on functional imaging
- Other parkinsonism-inducing condition
If using ergot-dopamine agonists, what regular investigations are needed?
Annually
- Cr
- ESR
- CXR
what are the risks of quick withdrawal of sudden fail of PD medical treatment?
- risk of acute akinesia
- neuroleptic malignant syndrome
What are the symptoms of neuroleptic malignant syndrome?
> > Muscular rigidity (typically, “lead pipe” rigidity)
Shuffling gait
Tremor
Dysphagia
> > Hyperthermia (temperature >38°C)
>> Autonomic dysregulation Diaphoresis Pallor Tachycardia Dyspnea Incontinence
> > Changes in the level of consciousness
Psychomotor agitation
Delirium progressing to lethargy, stupor, coma
Management of neuroleptic malignant syndrome ?
- discontinue all neuroleptic agents
- mainly supportive, monitoring and management in an ICU suggested
- controlling the rigidity and hyperthermia and preventing complications (eg, respiratory failure, rhabdomyolysis, renal failure)
- trial of dantrolene and bromocriptine to hasten clinical response
- amantadine, lorazepam, and electroconvulsive therapy
classes of PD medications
First-line
1 ) Levodopa
2) dopamine agonist
3) MAOB inhibitors
2nd line
- Anticholinergics
- Beta adrenergics for postural tremor
- Amantadine
- selective and reversible inhibitor of the enzyme catechol-O-methyltransferase (COMT) - Entacapone (for late Parkinson’s)
symptoms of dopamine dysregulation syndrome
on dopaminergic medications, associated with
- impulse control disorder
- abnormal behavior
- hypersexuality
- pathological gambling