Simple rapid movements, resembling a body spasm, are termed simple motor tics such as eye blinking, head jerks, and facial grimace.
[ocdtypes.com]
More common simple tics include eye blinking, facial grimacing, shoulder shrugging, and head jerking and shoulder jerking.
[finspeds.com]
For example: eye blinking, jaw movements, shoulder shrugging, head bobbing/jerking, facial grimacing, neck stretching, arm jerking, etc.
[hmhk.com.au]