| Tremor, bradykinesia, rigidity, postural instability | Cognitive impairment, bradyphrenia, tip-of-the-tongue (word finding) phenomenon |
| Hypomimia, dysarthria, dysphagia, sialorrhoea | Depression, apathy, anhedonia, fatigue, other behavioural and psychiatric problems |
| Decreased arm swing, shuffling gait, festination difficulty arising from chair, turning in bed | Sensory symptoms: anosmia, ageusia, pain (shoulder, back), paresthesias |
| Micrographia, cutting food, feeding, hygiene, slow activities of daily living | Dysautonomia (orthostatic hypotension, constipation, urinary and sexual dysfunction, abnormal sweating, seborrhoea), weight loss |
| Glabellar reflex, blepharospasm, dystonia, striatal deformity, scoliosis, camptocormia | Sleep disorders (REM behaviour disorder, vivid dreams, daytime drowsiness, sleep fragmentation, restless legs syndrome) |