In some cases
the response to a stimulus is always the same and needs to be applied quickly
in order to not damage the body. In order to reduce reaction time the brain is
removed from the process such that the impulse travels up the sensory nerve
through a small relay nerve in the spinal cord that connects directly to
the motor nerves so the reflex response can take place.
Nevertheless
it is important to note that the receptor does still relay the impulses to the
brain so that we are aware that we have touched a hot/sharp object (for
example) and this creates the response of us saying “ouch” but this is
significantly later than the reflex response... The reason reflex responses
work is because the decision and response is always the same.
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