There are two main categories of learning: non-associative and associative learning. Both types of learning have sub classification; like non-associative mainly divided in habituation, sensitization and perceptual learning. Associative learning has subdivision of classical and operant conditioning learning. Various groups of neuron are motivated according to stimulation types. Habituation needs neutral and non-noxious stimuli which make less neurotransmitter substances to postsynaptic motor neuron, but for sensitization, the stimulation is biologically relevant that increase neurotransmitter...