Stroke

Definitions
Stroke (“brain attack”) is the sudden onset of a focal neurologic deficit(s) resulting from either infarction or hemorrhage within the brain.

*Transient ischemic attack (TIA) or “mini-stroke:” Stroke symptoms that resolve in <24 hours; Reversible ischemic neurological deficit (RIND): Stroke symptoms that last >24 hours but <1 week

Multiple Sclerosis

Multiple sclerosis

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Parkinson Disease

Definitions

Parkinson disease (Parkinson's disease, PD) is a progressive neurodegenerative disorder associated with a loss of dopaminergic nigrostriatal neurons. It is named after James Parkinson, the English physician who described the shaking palsy in 1817.

Parkinsonism, the syndrome, is a common movement disorder. PD is its most common cause.

Meningitis

Definitions
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges.