-Precipitated by sudden voluntary movement
-Most common paroxysmal movement disorders
-Multiple attacks, frequency up to 100/day
-Attacks are brief, seconds
-Antiepileptic drug responsiveness
- Precipitated by a prolonged or sustained exercise
- Onset childhood
- Attacks: 2-5 min (up to 2 hours), stop within 10 min after stopping exercise
- Most common presentation dystonia
- Relationship: Young-onset PD, GLUT1 def, DYT 9& 18
- Restrict exercise
6/
- Is this a real paroxysmal movement disorder?
- Attacks occur during Non-REM sleep
- Many attacks < 1 min, can be indistinguishable from frontal lobe epilepsy
- Dystonic posturing, ballistic or choreic movements, without ictal EEG abnormalities
- ADCY-5 mutation!
9/
David Newman-Toker, neuro-otology
Senior author of "HINTS to diagnose stroke"
1/
What is dizziness?
-Dizziness→ impaired perception of spatial orientation without vertigo
-Vertigo→ illusion of motion (spinning/non-spinning)
>Subjective (person)→ MC peripheral
>Objective (environment)→ MC central
2/
-Oscillopsia→ 'world bounces'
>can’t read signs while walking
>B/L vestibular hypofunction
-Lightheadness, syncope→ LOC
-Imbalance→ severe truncal ataxia
3/
"Involuntary movements on one side that mirror voluntary actions on the other"
-Normal in <7–10yo (corpus callosum myelination), 70% healthy children (on speed-based task)
2/
Pathophysiology
Three teories
-Overflow
> signal 'overflows' to the other hand
-Weak interhemispheric inhibition
> both hemispheres fire together
-Abnormal crossing motor pathways
>same commands go to both hands
What EXACTLY happened before, during, and after the event?
-open-ended quest at begining, than close
-LOC, incotinence
-Witness and recurrence
*avoid term fainting
-Triggers (sleep dep, drugs, stand) vs premonitory symptoms