https://mindlab-blog-drafts.pages.dev/tags/serotonin/Recent content in Serotonin on MindLAB Neuroscience — Draft ReviewHugo -- 0.156.0en-us2026 Dr. Sydney Ceruto — MindLAB NeuroscienceTue, 07 Apr 2026 00:00:00 +0000https://mindlab-blog-drafts.pages.dev/posts/serotonin-mao-a-aggression-genetics/Tue, 07 Apr 2026 00:00:00 +0000https://mindlab-blog-drafts.pages.dev/posts/serotonin-mao-a-aggression-genetics/<h1 id="serotonin-mao-a-and-the-genetics-of-conflict-escalation-why-some-brains-are-neurochemically-primed-for-aggression">Serotonin, MAO-A, and the Genetics of Conflict Escalation: Why Some Brains Are Neurochemically Primed for Aggression</h1> <p><img alt="Serotonin MAO-A aggression genetics — serotonergic pathways flowing toward prefrontal cortex with enzyme degradation at synaptic junctions — Dr. Sydney Ceruto, MindLAB Neuroscience." loading="lazy" src="https://mindlab-blog-drafts.pages.dev/images/posts/serotonin-mao-a-aggression-genetics-hero.webp"></p> <p>The <strong>MAO-A gene</strong> — specifically its low-activity variant — reduces the brain&rsquo;s ability to metabolize serotonin at the synapse, starving the prefrontal cortex of the neurochemical fuel it requires to inhibit impulsive aggression. This is not a metaphor. <em>Monoamine oxidase A — the enzyme responsible for breaking down serotonin, dopamine, and norepinephrine after release</em> — operates at measurably different efficiencies depending on which allele a person carries. When combined with early adversity, this genetic variation produces a compound vulnerability: the prefrontal brake that prevents escalation during conflict literally runs on a reduced fuel supply. In 26 years of practice, I observe the downstream behavioral signature of this mechanism with striking consistency — individuals whose conflict escalation is predictable, intense, and genuinely bewildering to them afterward.</p>