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In neuroscience, synaptic plasticity is the ability of synapses to strengthen or weaken over time, in response to increases or decreases in their activity.Since memories are postulated to be represented by vastly interconnected networks of synapses in the brain, synaptic plasticity is one of the important neurochemical foundations of learning and memory (see Hebbian theory).
Briefly, the model states that the generation of an action potential is determined by two ions: Na and K .
Neurons are cells that are specialized to receive, propagate, and transmit electrochemical impulses.
In the human brain alone, there are over eighty billion neurons.
When there is a change in voltage in the terminal bouton, voltage-gated calcium channels embedded in the membranes of these boutons become activated.
These allow Ca2 ions to diffuse through these channels and bind with synaptic vesicles within the terminal boutons.
Once bounded with Ca2 , the vesicles dock and fuse with the presynaptic membrane, and release neurotransmitters into the synaptic cleft by a process known as exocytosis.