Projections actually involve a change of atomic structure. Consciousness simply changes its form. When projection is first accomplished, there is a strong charge of sexual hormones which are also utilized in projection. After projection is accomplished, however, there is a marked decline in chemical activity and hormone action, a drop in body temperature and a drop in blood pressure. The rapid eye movements noted by dream investigators cease entirely.

p. 347 - Seth, Dreams & Projections of Consciousness, (1986)