Parkinsons Disease is a progressive condition occurring in mid to late life, due to a degenerative change in the brain.

Resulting in a deficiency of the naturally occurring substance dopamine, which transmits nerve impulses, it causes rigidity of muscles and tremor when resting, and unsteadiness in walking. Symptoms include: a fixed expression with lack of blinking, giving a mask-like look; tremors of the hand when sitting still; movements are slowed, with loss of postural reflexes that help to maintain a person in an upright position; typical shuffling gait and the body stoops; voice and speech may be affected and they may have difficulty in swallowing.