Week 6 Neuro Flashcards
Parkinson
cardinal features
- bradykinesia
- resting tremor suppressed by movement
- lead pipe rigidity with passive movement
Parkinson
motor features
- resting tremor
- lead pipe rigidity
- bradykinesia
- postural instability
- gait: shuffling
- freezing (initiating, turns, obstacles)
Parkinson
non-motor features
- autonomic dysfunction (bladder, bowels, postural instability)
- dementia
- depression
- sensory (anosmia, paresthesia, pain)
- sleep disturbance (nocturia, stiffness at night, RLS)
Treatment of anxiety in elderly
SSRIs and SNRIs recommended
- which one is well tolerated?
- common side effects?
- increased risk in elderly?
escitalopram, citalopram
SERTRALINE
side effects: GI upset, insomnia, sexual dysfunction, sedation
INCREASE risk GIB if on concurrent NSAIDs
INCREASE risk bone density loss, hip fracture, SIADH
Treatment of anxiety in elderly
SNRI
-venlafaxine side effects
-duloxetine side effects:
venlafaxine: sexual dysfunction, sweating, increase in SBP and DBP
duloxetine: BP not as affected
monitor for urinary retention, sweating
Treatment of anxiety in elderly
TCA - why avoid?
MAOI - why avoid?
TCA: anticholinergic: orthostatic hypotension, falls, urinary retention, confusion, cardiac effects
MAOI: orthostatic hypotension, falls, HTN crisis
are benzos recommended for treatment of anxiety in elderly?
risks»_space;»> benefits
recommend lorazepam, oxazepam or temazepam if MUST be used (metabolized by conjugation)
RISK of falls, hip fracture, cognitive impairment, dementia
treatment of anxiety in elderly
are antipyschotics recommended?
black box warning!
increased mortality esp in elderly with dementia
Quetiapine is effective for GAD
Risk long term use: increase osteopenia, bone loss
features of delirium
AIDA
AIDA
- acute, fluctuating
- inattention
- disorganized thinking
- altered LOC
what neurotransmitters are imbalanced in delirium?
cholinergic deficiency
dopaminergic excess
what drug class is implicated as precipitator and predisposing factor in delirium?
anticholinergics!
esp oxybutynin and diphenhydramine
**think of anticholinergic burden
for hospitalized patients, what are the common modifiable triggers for delirium?
- fluid and electrolyte imbalance
- infection
- drug toxicity
- metabolic d/o
- sensory and environmental problems (eg untreated pain, missing hearing aids or glasses, poor sleep)
Dementia
MMSE ratings:
mild:
moderate:
severe:
mild: 20-26
moderate: 12-29
severe: <12
Death from severe dementia is often a result of what processes?
malnutrition
infections (aspiration pneumonia, pressure ulcers)
Pathophysiology of Alzheimer’s
amyloid beta (ABeta) plaques and tau fibrillary tangles Plaques and tangles cause "downstream" effects: synaptic dysfunction, mitochondrial damage, vascular damage, and inflammation
Alzheimer’s non-modifiable risk factors
- genetics
- family hx
- Down syndrome (APP gene carried on chromosome 21)
- low education
- CKD
- afib
- depression
Dementia modifiable risk factors
what class of meds?
HTN
- CVD
- obesity
- DM
- sedentary lifestyle
- OSA
- social isolation
- ETOH, smoking
- anticholinergic meds, benzo, PPI
- environmental pollutants
- brain trauma
- hearing impairment
Workup of cognitive impairment
Labwork?
B12 level, TSH, HIV, syphilis, metabolic screen, liver enzyme, CBC, lytes
*identify reversible causes
Components of HISTORY differentiating between:
- MCI
- Alzheimer’s
MCI: cognitive deficits across one or more domains
Alzheimer’s progressive memory loss and other cognitive deficits
-impact on ADL and IADL
Components of HISTORY differentiating between:
Vascular dementia
Lewy Body dementia
vascular: hx vascular risk factors: eg hx of stroke/TIA
* executive function as prominent early symptom
* can commonly present WITH Alzheimer’s (Mixed dementia)
Lewy body:
-well formed visual hallucinations, REM sleep disorder, falls, fluctuating cognition
Dementia DDX
- depression
- OSA
- NPH
- subclinical seizures
- SDH
- untreated hearing and vision impairment
- side effect of anticholinergic meds
Treatment of Dementia
NO disease modifying or curative drug therapies for MCI, AD or other dementia
goal is to improve QoL
support autonomy
Person-Centered Care Framework
Informed decision making and self-determination
side effects associated with cholinesterase inhibitors (donepezil, galantamine, rivastigmine)
GI distress wt loss urinary urgency BRADYCARDIA, syncope sleep disturbances (vivid dreams)
side effects associated with NDMA receptor inhibitors (memantine)
Fewer s/e but can be dizzy, hallucinations, and increased agitation
what type of dementia should NOT be treated with cholinesterase inhibitors or NDMA receptor inhibitors?
frontal-temporal dementia (may worsen symptoms)
What is the DICE approach to BPSD ?
describe
investigate
create
evaluate
risk factors for late life depression?
chronic medical illness loss of loved one relocation disability social isolation
older adults with depression are more likely to present with what symptoms?
may deny depression or mood symptoms
may have more physical/somatic symptoms
suspect depression if somatic complaints out of proportion to medical illness
how is depression differentiated from normal grief and bereavement?
grief does not impact functioning (or at least very minimal)
typically does not have active suicidal ideation or florid psychosis
grief generally recovers 1 year after loss
what co-morbidities have strong correlation with depression?
stroke arthritis heart disease (MI and heart failure) cancer substance use iatrogenic (meds: benzos, opiates, steroids)
symptoms of manic episode
(DIGFAST)
duration?
Distractibility
Impulsitivity / Indiscretion (excessive involvement in pleasurable activities
Grandiosity – Inflated self-esteem
Flight of ideas / Racing thoughts
Activity increase / Increase goal-directed behavior (socially, sexually, at work, etc)
Sleep deficit (decreased need for sleep)
Talkativeness (pressured speech)
distinct period of at least 7 days of persistently elevated, expansive, irritable behaviour
-at least 3 of following
depression screening
Geriatric Depression Scale
PHQ-9
Beck
suicidal ideation
**always test cognitive functioning
(MMSE, MoCA, mini-cog)
SSRI common side effects
GI upset
Diarrhea (sertraline)
constipation (paroxetine)
Insomnia, jitteriness
Hyponatremia
GIB
Extrapyramidal (tremors, parkinsons, bruxism)
SSRI prescribing precautions in elderly
CYP450 – watch drug interactions
*choose escitalopram, citalopram or sertraline (little effect on CYP450)
SIADH: risk factors age, female, low weight, use of diuretics, NSAIDs
*symptoms: fatigue, anorexia, confusion
GIB: risk factors use of NSAIDs, ASA, anticoagulants
Prolonged QT: citalopram, dose dependent
- max dose 20 mg if age >65
- max dose 40 mg up to age 65
Balance
3 main sensory inputs to maintain balance
Proprioception (muscle spindles, golgi tendon)
Vestibular: position and acceleration of head in space, CN VIII to vestibular nuclei
Vision
Screening for falls risk: 3 questions
Have you fallen in the last year?
Do you worry about falling?
Do you feel unsteady when standing or walking?
Symptoms often seen with falls?
syncope/presyncope
vision
cognition impairment
urinary urgency/impairment
Components of physical assessment for frequent falls
Cognition: MMSE, miniCOG MOCA
*even in absence of reported cognitive changes
CNS: neuro exam
*sensation in feet
CV: orthostatic hypotension
MSK: strength, resting muscle tone, tremors
Vision
Gait exam
Balance: tandem gait, Romberg
TUG (over 12 sec is positive for falls risk)
Get up from chair
Gait assessment: 4 S’s
Sit to stand
Speed (slow speed predicts falls, functional decline, death)
Stance (wide vs narrow)
Step (clearance, shuffling, symmetry, antalgic Trendelenberg)
Medication culprits linked to falls
antidepressants anticonvulsants BENZOS*** sleep aids anticholinergic meds opiates
Dizziness is a broad term used to describe different sensations including:
- vertigo (spinning)
- disequilibrium (unsteadiness, only when erect, disappears when sitting/lying)
- presyncope (lightheadedness, about to faint)
How is orthostatic hypotension defined?
SBP drop of 20+ mm Hg
DBP drop of 10+ mm HG
within 3 minutes of standing
How is postprandial hypotension defined?
SBP drop of 20+ mm Hg within 1-2 hours of eating
Acoustic neuroma
symptoms?
unilateral SNHL
- high frequency
- poor word recognition
Unilateral and rapid progression
Disequilibrium not related to position
Tinnitus
Nystagmus with peripheral lesions?
central lesions?
peripheral: unidirectional horizontal/rotational nystagmus
central: easily seen in light, vertical or gaze-evoked
Modifiable risk factors for stroke
Which one is most important?
HTN ***most important** DM Hyperlipidemia Afib OSA Smoking ETOH (light to mod associated with DECREASED risk, heavy use associated with INCREASED risk) Inactivity
Sequence of assessment for suspected stroke
- initial survey (LOC, speech, following instructions, weakness)
- gaze deviation, pupils, facial weakness, tone
- VS and capillary glucose
- imaging
- NIHSS assessment
- *only finger stick glucose is needed before starting IV alteplase
- INR if on warfarin
Other labs can wait
timeframe for IV alteplase
Treatment window: within 3-4.5 hours
ideally before 3 hours
TIA
why is rapid recognition important?
symptoms usually last 15-20 min with complete recovery
TIA is a notable risk factor for subsequent stroke
**especially high in first 90 days after TIA
what is the single most important treatable risk factor for stroke?
BP control
goal of SBP <140, DBP <90
Secondary ischemic stroke prevention
ANTIPLATELET agent for all pts after first stroke
ASA (50-100 mg daily), clopidogrel (75 mg)
*depends on underlying etiology
*DAPT (dual antiplatelet therapy) if TIA and minor stroke
Duration should not be > 3 months
STATINS for hyperlipidemia
- HIGH DOSE atorvastatin 80 mg daily
- diet has NO effect on stroke incidence
- shared decision making if limited life expectancy (<5 years)
ANTICOAGULATION for pts with afib
- DOAC preferred over warfarin *consider renal function
- ASA 325 mg if unable to take po anticoagulant
- left atrial appendage (LAA) occlusion device eg Watchman if nonvalvular AF
SMOKING CESSATION
DIABETES glycemic control
PHYSICAL ACTIVITY
What is the most common underlying etiology of seizures in older adults?
STROKE
- early seizures: within 2 weeks of stroke
- late onset: >2 weeks after stroke
post-stroke seizures associated with poor functional recovery and outcomes