These terms have been used in different ways by different authors, to describe:
- A volitional purposeful act designed to camouflage or draw atten- tion away from an involuntary movement, such as chorea;
- Strange movements of presumed psychogenic origin. It should be remembered that many movements previously thought to conform to this definition have subsequently been recognized to have an organic basis (e.g., klazomania).
The terms are now seldom used.