How are long term memories stored in the brain? Explain the Hebbian learning mechanism.

How are long term memories stored in the brain? Explain the Hebbian learning mechanism.

The Canadian psychologist, Donald Hebb, introduced the idea, that memories are formed at synapses. He claimed that learning and memory are represented in the brain by physiological changes, which take place in the synapse.
His idea was that activity of neurons (when particular experience cause nerve impulses to travel down the axon of neuron and when the impulse reach the synapse, neurotransmitter is released onto another neuron) strengthens the synapse by causing structural changes, greater transmitter release and increasing firing. He also proposed that changes that occur in hundreds or thousands of synapses that are activated by a particular experience provide a neural record of the experience.

His proposal became the starting point for modern research on the physiology of memory