human brain
Enable an AI agent to recognise a human brain as an organ, record its structure and condition, interpret evidence within its limits, and identify appropriately authorised observation or intervention.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an AI agent to recognise a human brain as an organ, record its structure and condition, interpret evidence within its limits, and identify appropriately authorised observation or intervention.
The human brain is the organ of the central nervous system located within the skull, composed of interconnected neurons, glial cells and supporting tissues that integrate sensory information and regulate movement, bodily functions, cognition and behaviour.
It can be Locate and describe a brain region using an explicitly identified anatomical reference.; Associate imaging, electrophysiology, examination and tissue observations with the correct brain, region and time.; Compare structural or functional observations across time while checking acquisition and processing differences.; Identify missing evidence and confounders before interpreting a brain finding.; Prepare brain-specific observation, specimen handling or intervention options for appropriately qualified review.; Flag observations requiring clinical interpretation without independently converting them into a diagnosis or determination of death..
Distinguishing features
Identify whether the referent is the human intracranial central nervous system organ, one of its parts, or a representation of it; a region or scan is not a whole brain.
Require evidence of human biological origin for a specimen; resemblance to brain tissue does not establish that an organoid or nonhuman specimen is a human brain.
Distinguish brain from spinal cord by the anatomical boundary and convention used, explicitly documenting uncertain coverage near their junction.
Separate organ identity from functional condition: altered activity, injury or preservation does not by itself change which organ is being described.
Distinguish measurements of tissue or activity from claims about thoughts, abilities or identity; the latter require additional evidence and interpretation.
Scope
+ Whole-brain identity, anatomical regions and boundaries with neighbouring structures
+ Neuronal, glial and other tissue components and their organisation
+ Cerebral circulation, metabolic support and neural activity
+ Evidence connecting brain structures and networks to observed functions
+ Development, ageing, plasticity and acquired structural or functional change
+ Brain-specific measurements, specimen provenance and constraints on access or intervention
- Human taxonomy, population classification and whole-person biology
- Spinal cord and peripheral nerves beyond their interfaces with the brain
- The skull and other protective structures as independently modelled anatomical entities
- The mind, personal identity and subjective experience as independent concepts
- Neurological and psychiatric diseases as independent diagnostic and treatment models
- Brain organoids, computational neural networks and brain imaging equipment as separate things
Characteristics
- Referent and material context
- whole organ | region | tissue sample; in situ | removed | preserved; unknown where unresolved Prevents observations of a sample or preserved specimen from being treated as measurements of an intact functioning brain.
- Organ-to-person or donor relationship
- restricted person or donor reference, laterality where applicable, specimen lineage and provenance confidence Links observations to the correct organ while supporting appropriate handling of identifying information.
- Anatomical localisation
- named region, hemisphere, atlas and version, coordinate space, registration uncertainty Makes regional observations comparable without assuming all brains match the same atlas exactly.
- Brain and regional morphology
- volume in mL, mass in g, thickness or dimensions in mm; method and material condition required Records structural variation while preserving distinctions between measurements made in vivo and after removal or preservation.
- Tissue composition and integrity
- observed tissue classes, cellular features and integrity findings, each with location, method and uncertainty Distinguishes directly observed tissue properties from labels inferred through imaging.
- Cerebral perfusion
- mL/100 g/min when quantitatively measured; region, method and acquisition conditions required Supports assessment of blood supply without treating all perfusion methods or regional values as interchangeable.
- Neural activity observation
- modality-specific values, such as EEG amplitude in µV and frequency in Hz, with timing and recording conditions Keeps electrical recordings and indirect imaging signals tied to what the instrument actually measures.
- Functional assessment context
- task or examination, observed performance, reported experience where available, sleep or wake context, medication and other confounders Prevents interpretation of an activity pattern without the conditions under which it was recorded.
- Developmental and longitudinal context
- age at observation, age convention, earlier observations and interval between observations Allows changes to be interpreted against the same individual's trajectory and an appropriate reference population.
- Access and intervention constraints
- permitted purpose, consent or other authority, permitted procedures, responsible reviewer and unresolved restrictions Separates an agent's ability to describe a possible action from authority to perform or recommend it.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 7 bundles · 13 layers · 20 findings · 32 questions.
Organ identity and anatomy Establishes which human brain or brain material is represented and where its observations belong.
Brain records commonly mix whole organs, regions, specimens and images, making anatomical identity essential.
Referent and boundaries
Separates the brain organ from adjacent anatomy, extracted material and representations.
Brain referent
Record whether the subject is an intact brain, a specified portion or a derived specimen, with explicit anatomical coverage.
- Does this record describe a whole human brain, a named region or a tissue specimen derived from one? definition
- Which convention defines coverage at the brain-spinal cord junction and the inclusion of associated coverings and vessels? boundary
Regional organisation
Locates structures while preserving individual anatomy and reference-system differences.
Regional localisation
Record the hemisphere, anatomical label and reference space supporting each regional observation.
- Which brain region and hemisphere does the observation concern, and which atlas or anatomical convention supplies the label? definition
- How was the region identified, and what uncertainty arises from segmentation, registration or altered anatomy? measurement
Tissue and neural connections Describes brain tissue composition and the evidence for connections between regions.
Gross appearance alone does not describe cellular condition or establish neural connectivity.
Cellular and tissue properties
Captures observations of neurons, glia, myelin, vessels and tissue organisation at the resolution examined.
Observed tissue composition
Keep cell and tissue identifications linked to sampling location, preparation and detection method.
- Which neuronal, glial, vascular or myelin features were observed, and by what method were they identified? measurement
- Which brain region supplied the tissue, and how might sampling or preservation limit its interpretation? provenance
Connection evidence
Separates anatomical pathways from statistical relationships between activity signals.
Connection type and support
Record whether a proposed connection is anatomical, functionally associated or directionally inferred, including the method's limits.
- Does the connection describe an anatomical pathway, correlated activity or an inferred directional influence? definition
- What observation supports the connection, and what can that method establish about endpoints and direction? measurement
Physiological support and activity Records the brain's supply conditions and measured activity at a specified time.
A structural description cannot establish the physiological condition of a living brain.
Perfusion and metabolic context
Connects regional blood supply and metabolic observations to relevant systemic conditions.
Cerebral support observation
Record evidence concerning cerebral perfusion, oxygenation or metabolism without conflating these quantities.
- Which quantity was measured - blood flow, oxygenation or a metabolic indicator - and over which brain region and interval? measurement
- Which contemporaneous systemic measurements and support conditions are needed to interpret this cerebral observation? boundary
Activity and recording context
Describes electrical or other activity-related signals together with acquisition conditions.
Interpretable activity record
Preserve signal modality, spatial coverage, timing, artefacts and the subject's recording context.
- What signal was recorded, with what spatial coverage, temporal resolution and artefact controls? measurement
- Was the recording obtained during sleep, wakefulness, a task, sedation or another documented condition? provenance
Function and interpretation Relates brain observations to assessed functions while preserving the limits of inference.
An agent must distinguish a measured brain signal from evidence about cognition, behaviour or awareness.
Functional evidence
Links sensory, motor, cognitive and regulatory assessments to relevant brain observations.
Supported function association
Describe the assessed function, supporting observations and whether the evidence establishes association or supports a causal interpretation.
- Which function was assessed, using which task, examination or physiological observation? measurement
- What evidence links the result to this brain region or network, and does it support association or a causal interpretation? provenance
Limits of person-level inference
Keeps brain findings distinct from claims about a person's experience, capacities or identity.
Inference boundary
Make explicit which conclusions require behavioural assessment, self-report, clinical evaluation or evidence beyond the brain observation.
- Which proposed claims about awareness, memory, emotion or decision-making exceed what this observation directly establishes? boundary
- What additional assessment or qualified review is required before the finding informs a decision about the person? action
Development and change Represents brain development, ageing and changes associated with experience, injury or intervention.
Brain structure and function require temporal context; a single observation cannot establish a trajectory.
Developmental reference
Positions observations within a documented age and developmental context.
Age-appropriate comparison
Identify age conventions and reference populations before characterising a brain observation as expected or unusual.
- What was the age at observation, and does the record use gestational, postmenstrual, chronological or corrected age? measurement
- Which reference population supports the comparison, and how well does it match the individual and measurement method? provenance
Longitudinal change
Distinguishes measured change from acquisition differences and uncertain causal explanations.
Supported brain change
Record changes across observations with comparability checks and evidence for any proposed cause.
- What changed between observations, over what interval, and were acquisition and analysis methods comparable? measurement
- What supports attributing the change to development, ageing, learning, injury or intervention rather than measurement variation? provenance
Assessment and authorised action Makes brain observations traceable and connects proposed actions to their prerequisites.
Brain measurements, invasive procedures and donated tissue involve different evidential and authorisation requirements.
Observation and specimen provenance
Traces brain data and tissue through acquisition, handling and processing.
Traceable brain evidence
Retain acquisition details and transformations that affect interpretation of scans, recordings or tissue.
- Which acquisition, preparation and processing steps produced this brain observation, and are the underlying records available? provenance
- For removed tissue, what collection interval, fixation, storage and sampling details constrain comparison with living brain tissue? measurement
Action prerequisites
Records the basis for proceeding with brain-specific observation, sampling, stimulation or other intervention.
Permitted brain action
Describe each proposed action's purpose, target, authority, required expertise and unresolved conditions.
- What brain region and outcome does the proposed action target, and what evidence supports considering it? action
- What consent or other authority, qualified oversight and procedure-specific checks must be established before proceeding? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This describes an organ of Homo sapiens, not a species; the kinds listed are developmental stages rather than discrete anatomical taxa.
- Identifiers and named standards are recalled without source verification; applicable editions and jurisdictional requirements require checking.
- Measurements are approximate population-level descriptions, not diagnostic thresholds; neuron count depends on estimation methods and sampling.
- Which of these check these first hold for the sense of human brain this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Developing fetal brain
- Neonatal brain
- Child and adolescent brain
- Adult brain
- Ageing brain
- Which of these kinds and varieties hold for the sense of human brain this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Foundational Model of Anatomy - FMA:50801 - Identifies the brain as an anatomical structure.
- NCBI Taxonomy - 9606 - Identifies Homo sapiens, the organism bearing the organ; it does not identify the brain itself.
- Which of these identifiers and schemes hold for the sense of human brain this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- Terminologia Anatomica, maintained by the Federative International Programme for Anatomical Terminology, standardizes anatomical names.
- The World Medical Association Declaration of Helsinki provides ethical principles for medical research involving human participants, including relevant brain research.
- The International Council for Harmonisation E6 Good Clinical Practice guideline applies to clinical trials within its scope, including neurological interventions.
- Which of these standards and regulation hold for the sense of human brain this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Clinical assessment and treatment of neurological and psychiatric disorders.
- Neurosurgical planning using anatomical and functional mapping.
- Research into perception, memory, language, emotion and motor control.
- Development of brain-computer interfaces and neural prostheses.
- Education and postmortem investigation using donated brain tissue.
- Which of these real-world use hold for the sense of human brain this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Adult brain mass - Approximately 1200-1500; varies with body size, age and individual anatomy - g
- Total neuron count - Approximately 86 billion as a widely cited estimate, not an individual reference interval - neurons
- Mean cerebral blood flow in a resting adult - Approximately 40-60; differs substantially between grey and white matter - mL/100 g/min
- Which of these typical measurements hold for the sense of human brain this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Interrupted blood supply or oxygen delivery can cause irreversible tissue injury.
- Traumatic injury can damage brain tissue and blood vessels.
- Swelling or bleeding within the skull can raise intracranial pressure and cause herniation.
- Abnormal synchronized neuronal activity can produce seizures.
- Neurodegeneration, infection, inflammation and tumours can disrupt brain function.
- Which of these failure modes and hazards hold for the sense of human brain this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Central nervous system - Includes both the brain and spinal cord; the brain is its intracranial component.
- Cerebrum - Is a major subdivision of the brain; the whole brain also includes the cerebellum and brainstem.
- Mind - Refers to mental processes or capacities rather than the anatomical organ.
- Human - Is the whole organism; the brain is one of its organs.
- Brain organoid - Is a laboratory-grown cellular model of selected aspects of brain development or organization, not a complete human brain.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of human brain this model covers, and on what evidence? provenance
What the second pass must settle
- Does an existing Vercy world model already own the human brain concept, requiring this registry entry to link to it rather than receive a separate publication?
- Which anatomical authority should govern boundaries and regional terminology, including treatment of meninges, intracranial vessels and cranial nerve transition zones?
- Which primary sources and validated reference datasets should support age-dependent structural and physiological comparisons across the populations represented?
- How should the model represent conflicting evidence about functional localisation, network organisation and awareness without implying that a brain measurement determines a person's experience?
- Which clinical, research and postmortem workflows must this model support, and which jurisdiction-specific decisions and permissions should remain in linked governance models?