- Escape reflex
Escape reflex, a kind of
escape response, is a simple reflectory reactionin response to stimuli indicative of danger, that initiates an escape motion of an animal.
Escape reflexes control, e.g., the seemingly chaotic motion of a
cockroachrunning from under the foot when one tries to squash it.
In higher animals examples of escape reflex include the
withdrawal reflex, e.g., the withdrawal of a hand in response to a painstimulus. Sensory receptors in the stimulated body part send signals to the spinal cordalong a sensory neuron. Within the spine a reflex arcswitches the signals straight back to the muscles of the arm ( effectors) via an intermediate neuron ( interneuron) and then a motor neuron; the muscle contracts and the arm jerks. Only three nerve cells are involved, and the brainis only aware of the response after it has taken place.
Escape reflex arcs have a high survival value, enabling organisms to take rapid action to avoid potential danger.
Various animals may have specialized escape reflex circuits.
Examples of escape reflexes
**Ducking (flexing the neck to protect the head)
**Jumping at loud sounds
**Withdrawal of a body part when it touches something excessively hot or cold.
**Lateral giant escape in
**Escape reflex in squid
** Dorsal ramp interneuron (DRI) action in "Tritonia"
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