The other participants used their brains' left hemispheres for only the high-resolution images. This could mean the minds of people with BDD strive to acutely process visual details, even when there aren't any to process. This might be why they can see flaws in themselves, even when those flaws might not exist [source: Another biological factor under consideration is that people with BDD seem to have a chemical imbalance of the neurotransmitter serotonin, because they often respond well to the SSRI selective serotonin reuptake inhibitors class of antidepressants.
Serotonin is one of the chemicals in the brain that transmits signals between the billions of neurons that constantly communicate with each other, allowing the body to think and act.
Serotonin produced in each individual neuron from an amino acid called tryptophan is typically active in the regions of the brain responsible for emotions, sleeping and sensory perception. During interactions between neurons, serotonin is released from the end of the first presynaptic neuron and picked up by the second postsynaptic neuron. Not all of the serotonin will be taken into the second neuron. In the United States, it is available in 2-mg scored tablets; in Canada, it is available in 2-, 4-, and mg tablets.
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