After starting with Tension and Trauma Release Exercises (TRE), I have been curious about various forms of trembling.
There seems to be a few different types:
(a) Trembling from muscle fatigue. After exercise, physical exertion.
(b) Trembling to produce heat. Shivering from cold.
(c) Trembling after orgasm. Some report this.
(d) Trembling to release tension and trauma. Following a traumatic event (hunted by a predator, car accident), childbirth, and also the TRE exercises.
The muscle fatigue trembling seems relatively simple, and localized to the fatigued muscles.
Trembling to produce heat also seems relatively simple, and partly localized (for instance to the jaw) and partly general and involving the whole body.
Trembling after sex and/or orgasm may be a way for the system to release an “overload” from the stimulation of sex and orgasm. In some cases, this could be related to earlier sex related trauma, although that’s just a possibility.
Trembling from TRE seems different. It varies in frequency. It moves to different – and eventually just about all – areas of the body. It sometimes includes rhythmic movements of limbs (butterflying of the legs, shaking of hands etc.). It includes stretching. It seems to be guided by an inherent intelligence of the body, moving to where it’s needed and perhaps also at the frequency most needed. It seems to be much more about restoring the system to health (psychically and mentally).
David Berceli, the originator of TRE, uses the term neurogenic tremors for the TRE tremors. Neurogenic means initiated/guided by the nervous system, but all of these forms for tremblings seem to be initiated and guided by the nervous system. Using the word exclusively for the TRE type trembling doesn’t quite make sense to me. (I have to admit that I have used the word in that way in previous posts, because others do, and I have done so against my better judgment.) Some call it therapeutic trembling, which makes better sense.
It would be very interesting to know more about how these different forms of trembling are initiated, which parts of the nervous system is involved, and perhaps also which parts of the brain are involved in the different forms of trembling.