sternum
Enable an AI agent to recognise a sternum, describe its anatomy and condition, and identify what evidence and professional review are needed before an intervention involving it.
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 sternum, describe its anatomy and condition, and identify what evidence and professional review are needed before an intervention involving it.
In human anatomy, the sternum is a flat bone in the anterior midline of the thorax, comprising the manubrium, body and xiphoid process, that articulates with the clavicles and the costal cartilages of the first seven pairs of ribs.
It can be Locate and label the sternum and its identifiable components in an examination, image or specimen.; Measure sternal dimensions and alignment using explicit anatomical landmarks.; Map a suspected fracture, lesion or developmental variant to a specific sternal region.; Compare serial observations for changes in displacement, continuity or healing.; Identify missing anatomical evidence and route proposed sampling, surgical access or fixation for qualified clinical review..
Distinguishing features
Identify the organism and demonstrate that the structure occupies its species-appropriate sternal position; an isolated flat bone is insufficient identification.
In a human, distinguish the sternum by its anterior midline location and the arrangement of the manubrium, body and xiphoid process, allowing for developmental variation.
Distinguish a human rib from the sternum by tracing the rib's lateral course and its connection toward the sternum through costal cartilage where present.
Distinguish the clavicle from the manubrium by tracing their separate contours and their junction at the sternoclavicular joint.
Distinguish the whole sternum from an isolated sternal component, fragment or prosthetic replacement by recording which anatomical regions are present.
Scope
+ Identification of the sternum within a specified organism or anatomical specimen
+ Sternal parts, landmarks, geometry and tissue continuity
+ Articulations and attachment sites at the sternum
+ Developmental stage, ossification, fusion and anatomical variation
+ Local injury, disease, surgical alteration and healing
- Whole-organism taxonomy, population biology and conservation status
- The rib cage, vertebral column and shoulder girdle as complete structures
- Detailed anatomy and physiology of organs behind the sternum
- Systemic skeletal, infectious or malignant disease beyond its local sternal manifestation
- Diagnosis of chest pain and complete treatment or resuscitation protocols
Characteristics
- Organism and anatomical context
- Organism or specimen identifier; species identification with evidence Controls which anatomical landmarks, developmental expectations and comparisons are applicable.
- Represented extent
- Whole sternum; named component; fragment; partial resection; uncertain extent Prevents a finding about one component from being attributed to the whole structure.
- Sternal dimensions
- Length, width and thickness in mm, with landmarks, anatomical level and measurement method Supports reproducible description and assessment of whether available anatomy fits a proposed procedure.
- Contour and alignment
- Curvature, angulation, displacement and asymmetry; degrees or mm where measured Records shape and positional changes without assuming their cause.
- Ossification and fusion pattern
- Observed ossified regions and open or fused junctions, by location; unknown where unassessed Helps distinguish developmental anatomy from acquired discontinuity.
- Articulation and attachment map
- Connected structure, sternal site, side and observed connection condition Locates the sternum's contribution to chest-wall and shoulder-girdle connections.
- Local structural integrity
- Intact; discontinuity observed; displaced; healing; surgically divided; indeterminate Separates observed structural condition from an unconfirmed diagnosis.
- Local lesion or alteration
- Location, extent, imaging or examination appearance, interpretation and certainty Makes focal abnormalities traceable without treating all sternal abnormalities as the same process.
- Surgical material and residual anatomy
- Wires, plates, other implants or replacement components linked to location and procedure history Changes how continuity, healing and subsequent access are interpreted.
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: 6 bundles · 11 layers · 16 findings · 26 questions.
Sternal identity and boundaries Establish what organism and anatomical extent the sternal record represents.
The sternum is an anatomical structure, not an organism, and human anatomy must not silently define every species.
Organism-specific identification
Ground sternal identification in the organism and available anatomical evidence.
Sternum identification basis
Record the evidence supporting identification and the anatomical terminology applicable to this organism.
- Which organism or specimen does this structure belong to, and how was that association established? provenance
- Which positional and morphological features support identifying it as a sternum? definition
Whole and part boundaries
Separate the whole sternum from its components and neighbouring structures.
Represented sternal extent
Identify included components, missing portions and boundaries with adjacent cartilage, bones and implants.
- Does the record represent the whole sternum, a named component or a fragment? boundary
- Where does the represented sternum end and adjacent costal cartilage, clavicle or replacement material begin? boundary
Sternal form and connections Describe sternal geometry, landmarks and attachment interfaces.
Shape and connection sites distinguish the sternum and determine how local changes relate to surrounding anatomy.
Parts and landmarks
Locate recognisable sternal regions and define reproducible measurements.
Regional sternal geometry
Record dimensions and contour by region, including human manubrial, body and xiphoid landmarks when applicable.
- Which sternal parts and landmarks are visible, and which cannot be assessed? definition
- What are the dimensions and angulation at specified landmarks, and which method produced them? measurement
Articulations and attachments
Map connections without absorbing neighbouring structures into the sternum model.
Sternal interface map
Locate articulations and muscular or ligamentous attachments relevant to the observed sternum.
- Which clavicular, costal-cartilage and soft-tissue connections are identified at each sternal site? boundary
- Is an observed abnormality centred in the sternum, an interface or an adjoining structure? boundary
Sternal development and variation Interpret ossification, fusion and shape in developmental context.
Developmental junctions and anatomical variants can otherwise be misrecorded as injury or disease.
Ossification and fusion
Describe observed maturation without inferring a precise age from appearance alone.
Observed sternal maturation
Map ossified regions and junction status against documented organism and age information.
- Which regions are ossified, and which junctions appear open, partially fused or fused? measurement
- What species- and age-relevant reference supports interpreting this pattern? provenance
Anatomical variants
Record unusual openings, divisions and contours with explicit diagnostic uncertainty.
Variant versus acquired change
Document features of possible sternal foramina, clefts or xiphoid variants and their competing explanations.
- What opening, division or contour variation is present, and where is it located? measurement
- What evidence distinguishes a developmental variant from fracture, bone loss or surgical alteration? boundary
Sternal condition and change Record local structural abnormalities and their course over time.
A sternal model must distinguish observed damage, suspected causes and evidence of recovery.
Local integrity and lesions
Localise discontinuity and focal abnormalities while keeping interpretations separate from observations.
Local sternal abnormality
Describe the site, extent and evidence for a fracture, destructive change or other focal finding.
- Which sternal region is affected, and what discontinuity, displacement or tissue change is directly observed? measurement
- Which examination, imaging study or tissue assessment supports the interpretation, and how certain is it? provenance
Healing and postoperative course
Track sternal continuity and alignment after injury or surgery.
Serial sternal change
Compare dated observations of healing, separation and fixation condition.
- How have continuity, gap size, alignment and fixation appearance changed between comparable observations? measurement
- What documented injury or procedure explains the baseline anatomy used for comparison? provenance
Sternal assessment and intervention Connect anatomical evidence to assessment limits and review of proposed procedures.
Sternal intervention depends on local bone anatomy and nearby structures that may not be represented by surface landmarks alone.
Assessment coverage
Determine which sternal regions and relationships the available evidence can resolve.
Sternal evidence adequacy
Identify limitations from incomplete coverage, projection, resolution or implant artefact.
- Does the available examination or imaging cover the full sternal region relevant to the question? boundary
- What additional assessment would resolve an uncertain junction, posterior cortex or suspected local abnormality? action
Procedure-relevant anatomy
Record anatomical constraints for professional planning of access, sampling or fixation.
Sternal procedure constraints
Link the proposed sternal site to local thickness, variants, existing hardware and posterior relationships.
- At the proposed site, what is known about bone thickness, cortical continuity, openings and existing hardware? measurement
- Which posterior anatomical relationships and unresolved findings require qualified review before the proposed procedure? 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 description assumes the human anatomical sense; other vertebrates have sterna with different forms and relationships.
- The manubrium, body and xiphoid process are components, not varieties of sternum.
- Dimensions, fusion and ossification vary with age and individual anatomy; numerical ranges and exact ontology identifiers require verification.
- Which of these check these first hold for the sense of sternum this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Terminologia Anatomica - sternum - Standard Latin anatomical name; also called the breastbone in English.
- Which of these identifiers and schemes hold for the sense of sternum 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 (FIPAT), standardizes anatomical terminology.
- Which of these standards and regulation hold for the sense of sternum this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Contributes to protection of the heart and other structures within the thorax.
- Provides attachment for costal cartilages, clavicles, muscles and ligaments.
- The sternal angle provides a landmark for locating the second costal cartilage and counting ribs.
- Provides a surgical access route to the mediastinum through median sternotomy.
- Serves as the site over which chest compressions are applied during cardiopulmonary resuscitation.
- Which of these real-world use hold for the sense of sternum 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.
- Blunt trauma can fracture the sternum and may accompany injury to underlying thoracic structures.
- Chest compressions can cause sternal fractures.
- Sternotomy can be complicated by infection, instability or failure of bone union.
- A congenital sternal foramen can increase the risk of penetrating underlying structures during needling procedures.
- Which of these failure modes and hazards hold for the sense of sternum 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.
- manubrium - The superior part of the sternum, rather than the whole bone.
- body of sternum - The elongated central part of the sternum, rather than the whole bone.
- xiphoid process - The inferior part of the sternum, with variable shape and age-dependent ossification.
- rib - A paired curved bone of the thoracic wall; the sternum is an unpaired anterior midline bone.
- costal cartilage - Cartilaginous tissue connecting ribs to the sternum or adjacent costal cartilages, rather than sternal bone.
- thoracic cage - The larger skeletal framework incorporating the sternum, ribs, costal cartilages and thoracic vertebrae.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of sternum this model covers, and on what evidence? provenance
What the second pass must settle
- Does vr.tr.sternum intend a human-specific concept or a comparative anatomical concept spanning multiple animal groups?
- Which existing Vercy bone or thoracic-skeleton model should supply shared concepts without duplicating the sternum's specific anatomy?
- Which authoritative references should govern species-specific landmarks, ossification patterns and fusion variability?
- Which evidence and terminology should distinguish sternal developmental variants from traumatic, pathological and postoperative changes?
- Which validated assessment criteria should govern sternal healing, instability and procedure-specific anatomical adequacy?