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What is the role of the brain in reflex ...

What is the role of the brain in reflex action ?

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Generally reflex action is shown by spinal cord and there is no active role of brain in it. However the information input also goes to the brain.
In some reflex actions such as mouth watering on seeing delicious food, heartbeats, breathing, movement of diaphragm, yawning, blinking of eyes, sneezing, etc. brain is involved.
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