Jamir Pitton Rissardo Profile picture
Oct 10, 2022 11 tweets 6 min read Read on X
Paroxysmal Movement Disorders!

Dyskinesias!!!

- 4 groups, overlap
- Prevalence: 1/150 000
- Myoclonus, dystonia, chorea, athetosis, tics

#MedTwitter #neurotwitter #EndNeurophobia #movementdisorder

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First report of paroxysmal dyskinesia

1892 by Shuzo Kure, Japanese psychiatrist (1865-1932).

Referred to as atypical Thomsen’s disease (Myotonia congenital)


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Kinesigenic

-Precipitated by sudden voluntary movement
-Most common paroxysmal movement disorders
-Multiple attacks, frequency up to 100/day
-Attacks are brief, seconds
-Antiepileptic drug responsiveness

ja.ma/3CJAhFv via @JAMANeuro

3/
Kinesigenic

4/
NON-Kinesigenic

- Precipitated by alcohol, fatigue, caffeine, strong emotion
- Onset childhood
- Multiple attacks, frequency 2-3/day
- Duration: minutes to hours
- Avoid triggers, benzo responsive
- NO antiepileptics responsiveness

ja.ma/3CJEol2 via @JAMANeuro

5/
Exercise-induced

- 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/
Exercise-induced

ja.ma/3Vj6riK via @JAMANeuro

8/
Hypnogenic

- 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/
Summary

Kinesigenic: ⬆️⬆️⬆️ attacks/day; seconds; response AED

NON-Kinesigenic: ⬆️ attacks/day; minutes; non-response AED

Exercise-induced: exercise

Hypnogenic: ???

10/
NeuroTeach 8 - Paroxysmal Movement Disorders (Dyskinesias)

neuronland.blogspot.com/2022/11/neurot…

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More from @theneurolander

Feb 8
Mirror Movements (Spiegelschrift)

1st described by Dr. Friedrich Albrecht Erlenmeyer (1849–1926)
Grundzüge ihrer Physiologie und Pathologie, 1879

#NeuroPearl #NeurologyPearls #NeuroExam #NeuroCases #MedEd #AcademicMedicine #ResidentLife #NeurologyResident

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Definition

"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

by @AlbertoEspay @UCMovDis

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Read 43 tweets
Feb 1
Syncope vs Seizure

Fainting by love in Philadelphia Museum of Art
The Doctor's Visit by Jan Steen

#Neurology #Seizure #Syncope #Neuroscience

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Syncope spectrum

-Normal
-Prodrome→ early autonomic sx
-Presyncope→ near-syncope
-Intermediary→ gray-out/ syncope threshold
-Syncope
-Recovery

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Clinical history

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

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Read 19 tweets
Jan 29
Cognitive Changes

Alois Alzheimer (1864 – 1915), German psychiatrist and neuropathologist

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Referral

-word-finding difficulty (tip-of-the-tongue phenomenon)
-memory complaints (often vague, sometimes language-related)
-dissect complaints into domains

2/
Cognitive Domains

Use SAMPLE

-Social→ behavior
-Attention→ focus
-Memory→ retention
-Perceptual/ visuospatial→ navigation
-Language→ only language
-Executive function→ multisteps

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Read 22 tweets
Jan 25
Headache - Basics

Figure from Codex Vindobonensis 93 (12th century)

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Primary or Secondary?

1st question - onset

Hyperacute→ think vascular
Acute/subacute→ broader ddx
Chronic→ reassure if unchanged

Use SNOOP4 for screen secondary causes

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Characterize

-Pain features - "SOCRATES"
> quality (throbbing, pressure, stabbing)
> duration & frequency
> associated sx (photo/phonophobia, N/V, auto sx)

3/
Read 23 tweets
Jan 19
Diagnosing Neuropathy
Clinical Pearls

"There are numbness, tingling, and burning pains in the feet, with weakness of the legs, so that the patient walks with difficulty and unsteadiness"

Sir William Osler (1849 – 1919), Canadian physician

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Presentation
Referral "neuropathy," self-dx googling numbness/tingling
-hard≠numbness≠tingling≠weak

-true negative sx (loss) are more specific
>unable feel floor T°
>unable sense sand/cold surfaces

-positive sx (gain) are non-SP
>dd: CVI, MSK, compression, positional
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Localizing

P.neuropathy patterns
-stocking-glove distribution
>1st stocking (knee) level → 2nd hands: likely DM
-dist → prox progression in limbs
-symmetric sensory loss

3/
Read 22 tweets
Jan 12
Tuning Forks

"If you want to find the secrets of the universe, think in terms of energy, frequency, and vibration"

Nikola Tesla (1856 –1943), Serbian-American engineer

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History

1550 Gerolamo Cardano - transmission of sound per skull
1684 Schelhammer - fork to differentiate hearing disorders
1711 John Shore - invented TF
1834 Johann Heinrich Scheibler - different frequencies
1855 - Weber test
1870 - technical improvements

2/
TF Parts

Prongs (wings), stem (handle), and foot (base)

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Read 19 tweets

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