A convulsive tic or hysteric neurosis prevalent among Malays, similar to or identical with miryachit and jumping disease, the person affected performing various involuntary actions and making rapid inarticulate ejaculations in imitation of the actions and words of another person.

Malay-Indonesian trance syndrome (although similar syndromes are found elsewhere) characterized by an extreme response to startling stimuli such as violent body movements, assumption of defensive postures, striking out, throwing or dropping held objects, the mimicking of observed movements, and sometimes extreme suggestibility or obedience.

(Malaysia and Indonesia) hypersensitivity to sudden fright, often with echopraxia, echolalia, command obedience, and dissociative or trancelike behavior. The Malaysian syndrome is more frequent in middle-aged women. Similar syndromes include: amurakh, irkunii, ikota, olan, myriachit, and menkeiti (Siberian groups); bah-tschi, bah-tsi, and baah-ji (Thailand); imu (Ainu & Sakhalin, Japan); and mali-mali and silok (Philippines).