It is characterized by progressive loss of muscle control, which leads to trembling of the limbs and head while at rest, stiffness, slowness, and impaired balance. The progression of Parkinson’s disease and the degree of impairment vary from individual to individual.
Trembling in fingers, hands, arms, feet, legs, jaw, or head.Tremors most often occur while the individual is resting, but not while involved in a task. Tremors may worsen when an individual is excited, tired, or stressed.
Stiffness of the limbs and trunk, which may increase during movement. Rigidity may produce muscle aches and pain. Loss of fine hand movements can lead to cramped handwriting (micrographia) and may make eating difficult.
Slowness of voluntary movement. Over time, it may become difficult to initiate movement and to complete movement. Bradykinesia together with stiffness can also affect the facial muscles and result in an expressionless, “mask-like” appearance.
Postural instability :
Impaired or lost reflexes can make it difficult to adjust posture to maintain balance. Postural instability may lead to falls.
Parkinsonian gait :
Individuals with more progressive Parkinson’s disease develop a distinctive shuffling walk with a stooped position and a diminished or absent arm swing. It may become difficult to start walking and to make turns. Individuals may freeze in mid-stride and appear to fall forward while walking.