tremor

https://doi.org/10.1351/goldbook.12149
Repetitive, often regular and usually involuntary oscillatory movement caused by alternating contractions of opposing muscle groups.
Notes:
  1. There are many causes of tremor, some of them benign.
  2. A characteristic tremor originating in cerebellar pathways upon intentional fine movement ("intention tremor") can occur during alcohol withdrawal.
  3. A coarse rhythmic (\(\pu{3\!-\! 5 Hz}\)) tremor of the hands and forearms that appears when the muscles are relaxed ("resting tremor") is characteristic of Parkinson disease.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 913 [Terms] [Paper]