Biological explanations of depression - Neurotransmitters - Revision Notes in A Level and IB Psychology

Assumes that imbalance in biochemical molecules are responsible for depression
Neurotransmitters are chemical messengers in the brain and nervous system that trasmit nerve impulses from the presynaptic knob diffuse across the synaptic cleft to the post synpatic knob, where receptors recieve the impulse via a neurotransmitter. They then are reabsorbed back into the presynpathic knob via a channel protein.
Theory aim to correct imbalance of neurotransmitters such as serotonin in forms of drug therapy. Neurotransmitters especially serotonin, noradrenaline and dopamine are important in functioning of the limbic system in the brain,…

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