A special place among the unconditioned reflexes is occupied by the orientational reflex. This is a reflex to novelty. It arises in response to any rapidly occurring environmental change. An indicative reflex is called unconditionally reflex involuntary reactions, accompanied by a sharp increase in attention and muscle tone and caused by an unexpected or new stimulus to the body. An indicative reflex is externally expressed in alertness, listening, sniffing, turning the eyes and head, and sometimes the whole body toward a new irritant that has appeared. The implementation of this reflex provides a better perception of the active agent and has an important adaptive value.
Most often, an orienting reflex occurs with unexpected irritation of the visual, auditory or olfactory receptors. This reaction is innate and does not disappear with the complete removal of the cerebral cortex in animals. The difference between the orienting reflex and other unconditioned reflex reactions is that it weakens relatively quickly and dies away when repeated applications of the same stimulus are performed. This feature of the orienting reflex depends on the cerebral cortex.
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