Complete Mnemonic Collection for HP-06

1. Brain Parts Top-to-Bottom: "Can The Hypothalamus Make Cerebellum Perform Mechanically?"

• Cerebrum → Thalamus → Hypothalamus → Midbrain → Cerebellum → Pons → Medulla

2. Ear Ossicles: "MIS"

• Malleus (hammer) → Incus (anvil) → Stapes (stirrup) → oval window
• Extra: Stapes is the Smallest bone

3. Action Potential Ions: "NDKR" — "Nasty Dogs Kick Rapidly"

• Na in = Depolarize; K out = Repolarize
• Sequence: Na IN first (up phase), then K OUT (down phase)

4. Na+/K+ Pump: "3 Out, 2 In"

• 3 Na+ OUT (more out) — 2 K+ IN (less in)
• Think: "THREE Nasty [Na+] go OUT, TWO Kind [K+] come IN"

5. Reflex Arc: "RIME" (or RASIME for full)

• Receptor → Afferent (Sensory) neuron → Interneuron → Motor neuron → Effector

6. Forebrain Contents: "The Hippopotamus Can Theorize"

• Thalamus, Hypothalamus, Cerebrum (and hippocampus)

7. Eye Defects: "Myopia = Minus, Hypermetropia = H-Plus"

• Myopia → -ve (concave) lens; Hypermetropia → +ve (convex) lens

8. Rods vs Cones: "120 Rods Road to Night, 7 Colourful Cones at the Fovea"

• Rods: 120 million, peripheral retina, dim light (scotopic), rhodopsin
• Cones: 6-7 million, fovea, colour (photopic), iodopsin

9. Spinal Nerve Pairs: "C8-T12-L5-S5-X1 = 31"

• Cervical 8, Thoracic 12, Lumbar 5, Sacral 5, Coccygeal 1 = 31 total

10. Sympathetic vs Parasympathetic Memory Aid:

• Sympathetic = Stress (fight, flight): "5 Ds" — Dilates (pupils, bronchi, vessels to muscle), tachycarDia, Digestion Decreases, Dry mouth
• Parasympathetic = Peace (rest, digest): "SLUDD" — Salivation, Lacrimation, Urination, Digestion, Defecation increased

11. Meninges Order: "DAP" (from skull inward)

• Dura mater → Arachnoid → Pia mater

12. Neurotransmitter Associations:

• Dopamine deficit = Parkinson's (D → P = "Dopamine → Parkinson's")
• Serotonin deficit = Depression (S → D = "Serotonin → Depression")
• GABA = Brakes (G → B = "GABA = Brain Brakes")
• Glutamate = Gas pedal (G → excitatory)