--- title: How Does Depression Affect the Brain? date: 2026-09-16T13:00:32Z modified: 2026-09-18T17:08:01Z permalink: "https://lightheartassociates.com/psychology-blog/how-does-depression-affect-the-brain/" type: post status: publish excerpt: "" wpid: 3259 categories: - Depression - Mental Health tags: - Depression - Mental Health - depression - depression treatment - how does depression affect the brain featured_image: "https://lightheartassociates.com/wp-content/uploads/2026/09/woman-during-therapy-session-in-living-room-2026-01-07-00-38-13-utc-scaled.jpg" featured_image_alt: How Depression Affects the Brain timestamp: 2026-09-18T17:08:01Z --- Depression influences the brain’s ability to function up to its full potential. It has a more difficult time producing and processing important neurotransmitters responsible for mood and energy. Thankfully, depression usually responds quite well to treatment, and the brain’s beautiful neuroplasticity means it’s possible to get back to how you were functioning before the depression. ## Understanding Depression [Depression](https://lightheartassociates.com/wp-content/uploads/wp-mfa-exports/post/what-is-major-depressive-disorder.md) is a mood disorder characterized by persistent feelings of sadness, hopelessness, and a lack of interest or pleasure in activities once enjoyed. It can affect anyone, regardless of age, gender, or background, and it manifests differently in each person. The condition can lead to various emotional and physical problems, significantly impairing someone’s ability to function at home or work. The [symptoms of depression](https://lightheartassociates.com/wp-content/uploads/wp-mfa-exports/post/what-are-the-common-signs-of-depression.md) can vary widely, but may include: - Persistent sad, anxious, or “empty” mood - Loss of interest or pleasure in hobbies and activities - Feelings of hopelessness or pessimism - Irritability - Feelings of guilt, worthlessness, or helplessness - Decreased energy or fatigue - Difficulty concentrating, remembering, or making decisions - Insomnia or excessive sleeping - Appetite or weight changes - Thoughts of death or suicide _If you are feeling suicidal or experiencing a mental health crisis, please reach out for immediate support by contacting your local emergency services, visiting your local emergency room, or calling/texting the National Crisis Hotline at 988._ ## How Does Depression Affect the Brain? Depression can have profound effects on the brain, altering its structure and function. Research indicates that depression is associated with changes in several regions of the brain, including the hippocampus, amygdala, and prefrontal cortex. These areas are involved in mood regulation, stress response, and cognitive functions such as decision-making and memory. These changes become more profound the longer depression remains untreated, so it’s important to get help as early as possible. ### Shrinkage in the Hippocampus The hippocampus, which plays a vital role in forming new memories, can shrink in individuals with depression. This happens due to a prolonged exposure to increased production of the stress hormone cortisol.¹ ### Reduced Activity in the Prefrontal Cortex The prefrontal cortex, responsible for executive function, might also show reduced activity, contributing to difficulties in planning and concentration.² This is due to drops in serotonin and dopamine levels, lowering mood and the productivity of the brain’s reward centers, and prompting anhedonia. ### Increased Activity in the Amygdala The amygdala, which processes emotions, may become hyperactive. This can lead to an exaggerated response to negative stimuli and increased agitation.³ ## Are These Brain Changes Permanent? Thankfully, the brain is incredibly plastic, and proper treatment supports neurogenesis, or rebuilding and recovery. With the right care, usually involving both therapy and medication, as well as implementing lifestyle changes like getting enough movement and nourishing foods, these brain changes can be reversed.⁴ ## Treatment for Depression Effective [depression treatment](https://lightheartassociates.com/wp-content/uploads/wp-mfa-exports/page/depression-treatment-program.md) often involves a combination of therapy, medication, and lifestyle changes: - [Therapy modalities](https://lightheartassociates.com/wp-content/uploads/wp-mfa-exports/page/talk-therapy.md) like cognitive-behavioral therapy (CBT), dialectical behavioral therapy (DBT), and acceptance and commitment therapy (ACT) can help people better understand their negative thought patterns and develop the coping skills and self-compassion to move forward in healthy ways. - [Antidepressant medications](https://lightheartassociates.com/wp-content/uploads/wp-mfa-exports/page/psychiatry-medication-management.md) can also be prescribed to help balance brain chemicals linked to mood and emotions. A psychiatric provider will work with you to understand your current symptoms, medical and family history, and goals, and suggest medications from there. It might take a few tries, but once dialed in, these medications can improve brain function previously lost to depression. - [Lifestyle changes](https://lightheartassociates.com/wp-content/uploads/wp-mfa-exports/post/effective-coping-skills-for-depression.md), such as regular physical activity, a healthy diet, and sufficient sleep, play a crucial role in managing depression symptoms. Social support from family and friends can further enhance recovery. If these treatments aren’t enough to move the needle on symptoms, or if someone doesn’t react well to antidepressants, there are still other options. A psychiatric provider might recommend an alternative treatment like [Spravato®](https://lightheartassociates.com/wp-content/uploads/wp-mfa-exports/page/spravato-treatment-program.md), an esketamine-based nasal spray that increases glutamate in the brain, boosting overall communication between brain regions. ## Reach Out to LightHeart Mental Health to Find Expert Depression Treatment If you or a loved one is struggling with depression in the Seattle area, LightHeart Mental Health is here to provide the support you deserve. Our team of experienced professionals offers personalized treatment plans designed to address the unique needs of each client. We are committed to helping you navigate your mental health journey with compassion and expertise. Contact LightHeart Associates today at \[Direct\] to learn more about our depression treatment services, or [schedule your first appointment now](https://lightheartassociates.com/wp-content/uploads/wp-mfa-exports/page/schedule-an-appointment.md). **Sources:** 1. Sapolsky, Robert. (2001). Depression, antidepressants, and the shrinking hippocampus. _Proceedings of the National Academy of Sciences of the United States of America (PNAS)._ 2. Pizzagalli, D. A., & Roberts, A. C. (2022). _Prefrontal cortex and depression. Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 47_(1), 225–246. [https://doi.org/10.1038/s41386-021-01101-7](https://doi.org/10.1038/s41386-021-01101-7) 3. Grogans, S. E., Fox, A. S., & Shackman, A. J. (2022). The Amygdala and Depression: A Sober Reconsideration. _The American journal of psychiatry, 179_(7), 454–457. [https://doi.org/10.1176/appi.ajp.20220412](https://doi.org/10.1176/appi.ajp.20220412) 4. Trifu, S. C., Trifu, A. C., Aluaş, E., Tătaru, M. A., & Costea, R. V. (2020). Brain changes in depression. _Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologie, 61_(2), 361–370. [https://doi.org/10.47162/RJME.61.2.06](https://doi.org/10.47162/RJME.61.2.06)