Parkinson’s disease
Reading File
Finding Sources
Finding Sources
Reading File
Reading File
Now I have everything I need to build a rich mnemonic. Let me craft it.
🧠 Parkinson's Disease — Mnemonic Generator
The Mnemonic: "TRAP the Shaky Old Dopamine Dealer"
T – R – A – P covers the 4 cardinal motor features. The rest covers pathology + treatment.
🪤 TRAP (Cardinal Motor Features)
| Letter | Feature | What it means |
|---|---|---|
| T | Tremor | Resting "pill-rolling" tremor, 3–6 cycles/sec — present even when relaxed |
| R | Rigidity | "Cogwheel" or lead-pipe stiffness — muscles resist passive movement |
| A | Akinesia / Bradykinesia | Slowness/absence of movement — must be present for diagnosis |
| P | Postural Instability | Impaired balance reflexes → falls (festinating gait) |
"You get TRAPped in your own body."
🕺 The Shaky Old Dopamine Dealer
Now remember the pathology + non-motor stuff + treatment:
| Word | Stands For | Memory Hook |
|---|---|---|
| Shaky | Substantia nigra (pars compacta) degenerates | The "shaky" source of dopamine breaks down |
| Old | α-synuclein → Lewy bodies (eosinophilic inclusions) | Old clumped protein junk piles up in neurons |
| Dopamine | Loss of dopaminergic neurons → caudate & putamen go haywire | No brake = everything overexcites |
| Dealer | Depression, Executive dysfunction, Autonomic dysfunction, Lewy bodies, Expression loss (hypomimia / mask face), REM sleep disorder | The dealer's whole stash of non-motor problems |
💊 Treatment: "L-DOPA Saves Most Arrests"
| Letter | Drug Class | Mechanism |
|---|---|---|
| L | L-Dopa (+ Carbidopa) | Crosses BBB → converted to dopamine in brain |
| D | DA Agonists (pramipexole, ropinirole) | Directly stimulate dopamine receptors |
| O | MAO-B inhibitors (selegiline, rasagiline) | Block dopamine breakdown → prolongs effect |
| P | COMT inhibitors (entacapone) | Block peripheral L-dopa metabolism |
| A | Anticholinergics (benztropine) | Help tremor & rigidity (older agents) |
| S | Surgery — DBS (Deep Brain Stimulation) | Subthalamic nucleus targeting for refractory cases |
| M | MAO-B inhibitors (slow neurodegeneration) | Neuroprotective role |
| A | Amantadine | Blocks NMDA receptors; also helps dyskinesias |
⚡ Quick Recall Summary
TRAP the body → T tremor R rigidity A akinesia P postural instability
"Shaky Old Dopamine Dealer"
Substantia nigra → Lewy bodies → ↓Dopamine → DEALER (non-motor)
Treatment: L-DOPA Saves Most Arrests
Dirty Trick to Remember Dopamine is LOW (not high):
"In PD, Dopamine Disappears — you TRAP people because you can't let them move."
Contrast: Huntington's = too MUCH dopamine activity (hyperkinesis) ↔ Parkinson's = too LITTLE (hypokinesis).
Sources: Katzung's Basic & Clinical Pharmacology 16e; Guyton & Hall Medical Physiology
This is a shared conversation. Sign in to Orris to start your own chat.