It is always easier to learn by comparing two opposites. We can always find contrasting pairs which help us to memorize topics at ease.
I have compiled a list of interesting doubles just for the sake of memorizing complex topics, the list is being updated continuously.
1. Aortic dissection and aortic aneurism
Investigation of choice for Aortic dissection- MRI
IOC for Aortic aneurism- Angiography.
2.Parkinsonism and Schizophrenia
Parkinsonism is due to dopamine deficiency
Schizophrenia is due to dopamine overactivity
Alzheimers is due to Alcetylcholine.
3.Hallucinations in Schizophrenia and Alcoholism
Schizophrenia -Auditory hallucination
4. IL1 and IL2
IL1 – Secreted by macrophages
IL2- Secreted by T helper cells(CD4)
Function of IL1 is to stimulate IL2 production.
5.MAC and Km
MAC- Measure of potency of drug.Higher the MAC less potent the drug.
Km-Higher the Km less potent the drug is.
6.Potency and efficacy
Potency- Dose required for maximum effect
Efficacy-Maximum effect produced by a drug.
Efficacy more important than potency in clinical setting.
7.Labatelol and Lapatinib
Labetalol- Combined alpha and beta blocker
Lapatinib- Her1 and HER2 antagonist.
8.Physostigmine and Neostigmine
Physostigmine- Lipid soluble so crosses Blood Brain Barrier
Neostigmine- Lipid insoluble cannot cross BBB
9.Microglia and Astrocytes
Microglia- CNS macrophages
Astrocytes- Form Blood Brain Barrier
10.Osteocalcin and Osteopontin
Osteocalcin- Osteoblasti activity
Osteopontin- Epithelial tumour marker of ovary.
11.Night Terror and Nightmare
Night Terror- Not Recall NREM Sleep
Nightmare- Recall REM Sleep
12.Hypo and Hyperkalemic periodic paralysis
Hypokalemic Periodic paralysis- Calcium channel defect
Hyperkalemic Periodic paralysis- Sodium Channel defect
13.Muscular dystrophy and Myotonic dystrophy
Muscular dystrophy -X linked recessive
Myotonic dystrophy- Autosomal dominant