Abstract
Minor tremor (MT), the phenomenon that the body surface of the warmblooded animal is constantly vibrating, was led with the special pickup. The present investigation was to elucidate the meaning of MT and its originating mechanism.
1) The rhythm of MT was principally 10 cycles per second, and its amplitude was 1-10 micron. MT was influenced by the resting, temperature and hyperventilation. All other possible origins of the rhythm were excluded.
2) The originating mechanism of MT was discussed and it was suggested that the spinal reflex, especially gamma motor system, may be responsible to the production of MT. The evidences are as follows:
a) relation between the pinna reflex and MT,
b) relation between the electrical stimulation of central nervous system and MT,
c) the effect of drugs on MT.
3) Application of MT to the diagnosis of certain diseases will be possible in future.
