There are two types of reflexes. They are:
1. Unconditional reflex is an inborn reflex for an unconditioned stimulus. It does not need any past experience, knowledge or training to occur;
Ex: blinking of an eye when a dust particle is about to fall into it, sneezing and coughing due to foreign particle entering the nose or larynx.
2. Conditioned reflex is a respone to a stimulus that has been acquired by learning. This does not naturally exists in animals. Only an experience makes it a part of the behaviour.
Example: excitement of salivary gland on seeing and smelling a food. Thb conditioned reflex was first demonstrated by the Russian physiologist Pavlov in his classical conditioning experiment in a dog. The cerebral cortex controls the conditioned reflex.
