... what does this contribute to psychological analysis and treatment? This essay will look at biological processes associated with behaviour, based on evidence produced from selected studies, to illuminate this debate and address these questions. Biological processes of interest to psychologists concern the brain and nervous system. The brain has a right and left hemisphere which are divided into lobes, each with particular associated functions. Neurons are specialized electrically charged cells, specific to the brain and nervous system, responsible for transfer of information. Action potentials travel down the neuronal process to the presynaptic neuron where they stimulate the release of chemical ‚key-like' neurotransmitters into the synaptic junction between cells. These are either excitatory or inhibitory and engage with matching ‚lock-like' neighbouring cell receptors in the post-synaptic neuron. Neurotransmitters are then deactivated by enzymes present at the synapse. Abnormality in activity at the synapse, which can be caused by disease, injury or ...

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