Movement Disorders Flashcards
purpose of the basal ganglia
- make movements & prevents unwanted movements
which is excitatory? which is inhibitory?
* GABA
* Glutamate
- GABA: inhibitory
- Glutamate: excitatory
describe the direct pathway
promotes voluntary movement in trageted muscules (from through to the actual movement)
describe the indirect pathway
inhibition of movements in other muscles that do not contribute to the overall wanted movement
in normal movement, what acts on the pathways?
dopamine
in normal pathways what does dopamine act on? what after that?
thalamus which then excites the motor cortex
vocab
dyskinesia
any involuntary movement
vocab
athetosis
abnormal muscle contractions cause involuntary writhing movement
vocab
bradykinesia
slowness of movements
vocab
chorea
jerky involuntary movements affecting especially the shoulders, hips, and face (dance like movements)
vocab
dysmetria
misjuding distance to a target
vocab
hyposmia
reduced ability to smell
vocab
hemiballismus
- type of chorea
- usually involving violent, involuntary flinging of one arm/leg
vocab
akathisia
restlessness
vocab
titubation
shaking of the trunk and head
vocab
rigidity
stiffness, noted as increased muscle tone on examination
vocab
tardive dyskinesia
involuntary movements due to dopamine antagonists
Tic Disorders
describe tic disorders
neuropsychiatric diseases which are common in children
Tic Disorders
characterized by
- sudden twitches
- movements (motor tic)
- sounds that people do repeatedly (vocal tic)
Tic Disorders
describe simple motor tics
- appears in one muscle group
Tic Disorders
examples of simple motor tics
8
- nose twitching
- blinking/rolling eyes
- neck/head spasms
- head shaking
- head leaning back
- lip biting
- face grimacing
- shoulder struggling
Tic Disorders
describe complex motor tics
- simultaneously in more than 2 muscle groups
Tic Disorders
examples of motor tics
4
- kicking, skipping, or jumping while walking
- imitating others’ movements
- flaring nostrils and sniffing
- self hitting/twirling in place
Tic Disorders
examples of simple vocal tics
7
- dry cough
- chocking sound
- throat clearing
- making animal noises
- sniffling
- muttering
- saying syllables
Tic Disorders
examples of complex vocal tics
- palilalia
- echolalia
- stuttering
- coprolalia
Tic Disorders
what is palilalia
repletion of one’s own spoken words or sentences
Tic Disorders
what is echolalia
repletion of words spoken by others
Tic Disorders
what is coprolalia
saying obscene words or searing
Tic Disorders
5 tic disorders
- transient tic disorder
- chronic tic disorder
- complex tic disorder
- tourette’s syndrome
- unclassified tic disorder
Tic Disorders
describe transient tic disorder
when the tic sx temporarily and repeatedly appears and disappear before the age of 18
Tic Disorders
describe chronic tic disorders
when either one of motor or vocal tic repeatedly appears and disappears continuously for more than a year
Tic Disorders
describe complex tic disorder
when vocal and motor tics are combined
Tic Disorders
describe tourette syndrome
when the symptoms of a complex tix last more than a year
Tic Disorders
what % of kids experience tics? more common in who?
1 in 5 kids
3x more common in boys than girls
Tic Disorders
4 potential causes
- dopamine system dysregulation
- genetic factor
- environmental factors
- psycholgoical factors
Tic Disorders
what meds can be given?
class + 3 drugs
anti-psychotic drugs
* haloperidol
* pimozide
* risperidone
Tic Disorders
what does behavioral therapy consist of?
3
- relaxation training
- habit reversal
- family education
Tic Disorders
what operations to consider
2
- deep brain stimulation
- nerve surgery
Tic Disorders
what alternative treatments are available?
2
- cranio-scaral balance therapy
- TMJ balancing
Tremors
describe them
non-intentional rhythmic and oscillatory movements of a body part, which result from alternating or irregular synchronous contractions of muscles that have an opposite effect on a joint
Tremors
how are tremors classified
4
- distribution: which body part is affected
- state-dependent: action (essential tremor), rest (Parkinson’s disease)
- tremor frequency (number of oscillations/sec)
- amplitude (distance of movement)
Tremors
what 3 disorders are action tremors
- postural
- kinetic
- isometric
Tremors
what disorder is a rest tremor?
parkinson’s
Postural Tremor
describe
postural tremor happens when you try to hold a body part still, against the force of gravity
Postural Tremor
which is most common?
physiologic
Postural Physiologic Tremor
typically affects what parts of the body?
- upper limbs
- hands
Postural Physiologic Tremor
potential causes
- exaggerated physiologic responses (anxiety, fatigue, fright)
- drugs (amphetamines, alc withdrawal, caffeine, amiodarone)
- metabolic disorders (hypoglycemia, pheochromocytoma, thyrotoxicosis)
- toxins (mercury)
Postural Essential Tremor
most commonly impacts what areas of the body?
- hands and arms
- individually usually is worse on one side
- head, voice also possible
Postural Essential Tremor
risk factors
- male
- family hx
Postural Essential Tremor
age of onset
bi-modal
* 10-20
* 40-60
Postural Essential Tremor
what can help alleviate these?
alcohol
Postural Essential Tremor
how do these change with age?
- amplitude increases
- frequency decreases
Postural Essential Tremor
dx
clinical dx
Postural Essential Tremor
testing to r/o other differentials
5
- review med list
- review potential for alcohol/drug withdrawal
- consider TFTs in pts with hx of hyperthyroidism
- consider imaging w/ neurologic deficits
- EMG for tremor analysis
Postural Essential Tremor
Describe alcohol as a tx
- can use prophylactically (60 mL 10-15min prior to triggering event)
- alc potentiates GABA
- regular alc consumption not recommended
Postural Essential Tremor
what other meds are posisble for tx
- propanolol (most effective)
- primodine
- benzodiazapines
Kinetic Tremor
describe
occurs when doing something goal oriented and the tremor becomes worse when closer to the goal (ex: drinking from a cup)
Cerebellar Kinetic Tremor
associated with lesions/diseases where?
- cerebellum
- cereberal outflow pathways
Cerebellar Kinetic Tremor
where are tremors located?
ipsilaterally
Cerebellar Kinetic Tremor
what is it called if someone has these AND postural tremors?
head titubation tremor
Cerebellar Kinetic Tremor
what PE can you do to r/o?
- finger to nose test
- finger to finger test
- heel to shin test
Cerebellar Kinetic Tremor
which meds?
none have been proven to help!
Isometric Tremor
describe
occurs when contracting a muscle against an unmoving object
(ex: when doing push ups at gym & hands are on floor and start shaking)
Rest Tremors
what are resting tremors due to?
like in the brain
- abnormal synchronicity of basal ganglia and thalamic neuronal activity
Rest Tremors
signs/sx
6 components
- pill rolling w/ hands
- symmetric tremor
- tremor stops w/ movement but can resume once settled in new position
- leg, tongue, lip, jaw may be involved
- tremors worsen w/ emotional stress
- tremors get better with anti-parkinson meds
Parkinson’s Disease
describe
progressive neurodegenerative condition resulting in disorder of movement, autonomic functioning, and potentially cognition
Parkinson’s Disease
cardinal signs
4
TRAP
* Tremor (resting)
* Rigidity of trunk/limbs
* Akinesia or bradykinesia
* Postural instability
Parkinson’s Disease
hx findings
- onset is usually asymmetric and gradually spreads
- restlessness during sleep or sleepwalking is common
- reduction in smell
Parkinson’s Disease
sx (besides cardinal TRAP)
5
- decreased blinking
- sleep disturbances
- autonomic dysfunction (constipation, sweating, sex)
- bradyphrenia
- dementia
Parkinson’s Disease
dx
Clinical Diagnosis, testing to r/o other diseases
Parkinson’s Disease
what dx tools to consider
- CT/MRI if pt younger than 55 or presents abnormally for parkinson’s
- SPECT scan: distinguishes essential tremor from parkinson’s
Parkinson’s Disease
criteria for diagnosis
two plus of the following:
* resting tremor
* rigidity
* bradykinesia
Parkinson’s Disease
tx
gold standard: carbadopa, levodopa
(can do benztropine, amantadine, COMT inhibitors, MAO-B inhibitors)
Parkinson’s Disease
when is an anticholinergic the first choice?
- higher functioning
- no significant postural instability
- pt is under 60 y/o
Parkinson’s Disease
when is amantadine the first choice tx?
- higher functioning
- no significant postural instability
- pt over 60 y/o
Parkinson’s Disease
out patient management
- regular follow ups w/ PCP & neurologist
- screen for depression, mood disorders
- exercise & speech therapy
- assistive devices for home
Parkinson’s Disease
describe parkinson’s plus conditions
characterized by the primary features of Parkinson disease, but also include additional features such as dementia, cognitive deficits, and cranial nerve impairment
parkinson’s plus conditions
describe normal pressure hydrocephalus
- sx: wet, wobbly, wacky
- dx: CT
- tx: lumbar puncture drainage
parkinson’s plus conditions
describe Wilson’s disease
- genetic condition (autosomal recessive)
- psychiatric disturbances, liver failure, KF rings
parkinson’s plus conditions
describe postencephalitic parkinsonism
occurs following encephalitis
parkinson’s plus conditions
describe progressive supranuclear palsy
- parkinsonian sx PLUS vertical gaze palsy
- tremor may not be as prominent
parkinson’s plus conditions
describe shy-drager syndrome
- parkinsonian sx PLUS severe autonomic instability, gain issues, nystagmus
- dx: imaging to look for atrophy of brainstem/cerebellum
parkinson’s plus conditions
examples of autonomic dysfunction
- orthostatic hypotension
- UMN lesion sx (hyperreflexia, primitive reflexes)
- cerebellar sx (nystagmus)
parkinson’s plus conditions
describe lewy body dementia
- parkinsonian sx PLUS prominent dementia coinciding w/ onset of parkinsonian sx
Huntington’s Disease
describe overall
- CAG repeats create a mutant, damaging protein
- autosomal dominant genetic disorder
- gross atrophy of the caudate and putamen
Huntington’s Disease
what correlates with severity of sx?
extent of brain damage
Huntington’s Disease
avg age of onset? what impacts age of onset?
- 32 to 38 y/o
- onset becomes earlier w/ more CAG repeats
Huntington’s Disease
hx findings
- most pts know there is a family hx of huntington’s
- others may say they have family hx of “early onset dementia”
Huntington’s Disease
movement sx
5
- fidgetiness
- ballism or hemiballismus
- chorea
- parkinsonian features
- rigidity
Huntington’s Disease
cognitive sx
5
- anhedonia
- apathy
- untidiness
- short term memory loss
- dementia
Huntington’s Disease
behavioral symptoms
5
- change in affect
- mood disorders (depression, OCD)
- suicide
- psychosis
Huntington’s Disease
PE findings
4 components
- chorea (uncontrollable, jerky movements)
- hemiballismus (violent flinging of one arm)
- athetosis (abnormal, involuntary writhing movements)
- parkinsonian sx
Huntington’s Disease
dx
- clinical
- genetic testing (gold standard)
- imaging will show increased bicaudate diameter
Huntington’s Disease
tx
- no cure for the disease, just manage individual sx
Huntington’s Disease
what med options for:
* ballismus/choreathetosis
* parkinsonian sx
* depressive disorder
* psychosis
- benzodiazepines
- levo/carbo
- SSRIs
- atypicals
Ataxia
describe
loss of control of body movements
Ataxia
3 causes
- inherited/genetic
- acquired
- idiopathic (unk cause)
Ataxia
describe input pathway to cerebellum
peripheral nerve –> dorsal root ganglia –> spinal cord –> dorsal column –> spinocerebral pathway –> cerebellum
Sensory Ataxia
describe
problems w/ the proprioceptive pathway
Sensory Ataxia
PE finding
- inability to stand w/ eyes closed (Romberg test pos)
Sensory Ataxia
sx
- limb ataxia
- vibration defects
- proprioception defects
Genetic Ataxia (Friedrich)
age of onset
5-25 y/o
Genetic Ataxia (Friedrich)
sx
2
- progressive ataxia
- nystagmus
Genetic Ataxia (Friedrich)
PE Findings
4
- axonal neuropathy
- distal atrophy
- absent LE tendon reflexes
- upgoing toes w/ Babinski
Genetic Ataxia (Friedrich)
MRI findings
no cerebellar atrophy
Ataxia
Dx of ataxia
6 components
- PMH, FH of neurology (including durgs/toxins)
- blood test to r/o drugs/toxin/deficiencies
- UA for mercury
- MRI or CT of brain
- neuroimaging of spinal cord
- Electrophysiologic testing if sx of peripheral nerve dysfunction
Ataxia
Tx of ataxia
4 components
- medication has minimal impact unless caused by nutrional deficiences
- Some meds can reduce leg spasticity and address cerebellar tremors
- PT/OT
- Assistive devices
Ataxia
what are pts w/ ataxia more likely to do?
- mix meds
- fall
- become ill w/ aspiration pneumonia