pendulation → εκκρεμοειδής κίνηση
swinging like a pendulum, as of cargo being transported by crane
pendulation - WiktionaryOne element of Somatic Experiencing therapy is "pendulation", a supposed natural intrinsic rhythm of the organism between contraction and expansion. The concept and its comparison to unicellular organisms, however, can be traced to Wilhelm Reich, the father of somatic psychotherapy.
Somatic experiencing - Wikipedia