Osteoporosis

Definition
A skeletal disease characterized by low bone mass, disruption of skeletal microarchitecture, and increased skeletal fragility resulting in fractures occurring with a fall from standing height or less or with no trauma

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

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.