Reflex Chermaka

The Chermak-Geist reflex (Geist reflex) is a protective motor act consisting of flexion and extension of the leg (often accompanied by turning the torso and head in the opposite direction).

This reflex is innate and well expressed in newborns. In adults, it is suppressed by conditioned reflexes developed in response to painful stimuli.

The Chermak-Geist reflex, also the Geist reflex, is a protective motor act (abduction of the limb, flexion opposite to extension), consisting of three phases:

1. pre-flexion phase;
2. leg extension phase;
3. reverse flexion phase.

As the body develops, the phases of this reflex gradually disappear. If in a newborn the Chermak-Geist reflex is well expressed, then in an adult it is suppressed, since conditioned reflexes suppress the unconditioned reflex.