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Posted by Categories: Brain Health and Neuroscience

What Causes Depression? – What We Know in 2019

The traditional way we approached the cause and treatment of depression is to see it as a chemical imbalance. That is you have in sufficient amounts of the neurotransmitters serotonin, norepinephrine and dopamine and low levels of these brain chemicals are what is causing your depression. We treat the depression by replenishing these chemicals using medications that help your brain cells or neurons either produce more of the chemicals or stop the chemicals from being broken down after they are produced so that they hang around a little longer. This is the concept behind the SSRIs or serotonin reuptake inhibitors.

Now we see that the reason the neurotransmitters are low is because of disrupted neural circuits in the brain. It’s related to the concept of neuroplasticity. In this case with depression, you get negative neuroplasticity. In this video, I discuss how neuroplasticity (or the lack of it) contributes to depression. We have a long way to go and getting depression to resolve with medication and using medications that have minimal side effects. This new way of conceptualizing depression has an impact on the new medications that are being developed and the psychotherapies we use to treat depression.

Videos Referenced in this video
Treatment Resistant Depression https://youtu.be/2z5krS51pNg

References
André RB, Lopes M, Fregni F. A systematic review and meta-analysis of clinical studies on major depression and BDNF levels: implications for the role of neuroplasticity in depression, Int. Journal of Neuropsychopharmacology (2008), 11, 1169–1180.

Serafini G. Neuroplasticity and major depression, the role of modern antidepressant drugs. World J Psychiatry. 2012;2(3):49-57.
Duman CH, Duman RS. Spine synapse remodeling in the pathophysiology and treatment of depression. Neurosci Lett. 2015;601:20-9.

Kang HJ, Voleti B, Hajszan T, et al. Decreased expression of synapse-related genes and loss of synapses in major depressive disorder. Nat Med. 2012;18(9):1413-7.

Rush AJ, et al. Acute and Longer-Term Outcomes in Depressed Outpatients Requiring One or Several Treatment Steps: A STAR*D Report Am J Psychiatry. 2006;163:1905-1917.

Yang CC, Barrós-Loscertales A, Pinazo D, et al. State and training effects of mindfulness meditation on brain networks reflect neuronal mechanisms of its antidepressant effect. Neural Plast. 2016;2016:9504642.

Disclaimer: All of the information on this channel is for educational purposes and not intended to be specific/personal medical advice from me to you. Watching the videos or getting answers to comments/question, does not establish a doctor-patient relationship. If you have your own doctor, perhaps these videos can help prepare you for your discussion with your doctor.

I upload every Wednesday at 9am, and sometimes have extra videos in between. Subscribe to my channel so you don’t miss a video https://goo.gl/DFfT33

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About 

Cee Harmon is founder of Elevate Christian Network and Elevate Your Potential Magazine. He enjoys helping people improve the quality of their lives - spirit, soul, and body.
 
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