Atlas One · Host Biology · Scale 06 — Organ

Brain

The ~1.4 kg central organ of the nervous system: site of cognition, perception, memory, emotion, and motor control. Contains ~86 billion neurons in 4 cortical lobes, subcortical nuclei, cerebellum, and brainstem. Protected by skull, meninges, and the blood-brain barrier.

Also known as: encephalon, cerebrum, cerebral cortex, human brain

Scale 06 — OrganScale

draftStatus

2026-06-04Last Reviewed

This is an auto-generated stub page built from atlas entry frontmatter. A richer hand-crafted page is planned. See the atlas source for the full entry including detailed body sections.

brain

Brain

The ~1.4 kg central organ of the nervous system: site of cognition, perception, memory, emotion, and motor control. Contains ~86 billion neurons in 4 cortical lobes, subcortical nuclei, cerebellum, and brainstem. Protected by skull, meninges, and the blood-brain barrier.

Entry Metadata

Field	Value
ID	brain
Name	Brain
Status	draft
Last reviewed	2026-06-04
Atlas	01-human
Scale	06-organ

Cross-Atlas Connections

containsSynapse containsNeuron part-ofNervous System modulated-byDopamine modulated-byGlutamate modulated-byGaba connects-toCardiovascular System damaged-byPrion Protein composed-ofHippocampus composed-ofMicroglia composed-ofOligodendrocyte composed-ofAstrocyte damaged-byRabies Virus damaged-byZika Virus damaged-byCryptococcus Neoformans damaged-byTrypanosoma Brucei damaged-byToxoplasma Gondii damaged-byNeisseria Meningitidis damaged-byListeria Monocytogenes modulated-byGinkgo Biloba modulated-bySt Johns Wort target-ofMigraine connects-toAls connects-toHuntingtons Disease connects-toObsessive Compulsive Disorder connects-toAttention Deficit Hyperactivity Disorder connects-toGeneralized Anxiety Disorder connects-toPanic Disorder connects-toSocial Anxiety Disorder connects-toAlcohol Use Disorder connects-toOpioid Use Disorder connects-toInsomnia Disorder containsOrexin connects-toAnorexia Nervosa connects-toBorderline Personality Disorder connects-toMu Opioid Receptor connects-toBulimia Nervosa connects-toStimulant Use Disorder modulated-byAdenosine connects-toPtsd modulated-byCrh connects-toEndocannabinoid connects-toCannabis Use Disorder connects-toGambling Disorder connects-toFibromyalgia connects-toInternet Gaming Disorder connects-toSubstance P connects-toBinge Eating Disorder connects-toNeuropathic Pain connects-toNarcolepsy modulated-byMelatonin secretesActh containsNpy secretesProlactin secretesGrowth Hormone connects-toTestosterone connects-toEstrogen connects-toThyroid Hormones secretesVasopressin modulated-byLeptin connects-toTdp 43 connects-toGlp 1 connects-toIgf 1 damaged-byPlasmodium Falciparum

Sources