iliac crest
Enable an agent to identify an iliac crest, describe its anatomical relationships and observed condition, and assess whether evidence supports its use as a landmark or procedural site.
Bundle → Layer → Finding → Questions Filled
5 bundles · 9 layers · 13 findings · 21 questions
Crest identity and boundaries Establishes which iliac crest is represented and where its anatomical extent lies.
Bearer and side
Anchors the crest to a particular organism or specimen and ilium.
Iliac crest anatomical identity
Identify the superior border of the iliac wing and record the bearer, species, and laterality.
- What anatomical evidence identifies this structure as the superior border of the ilium? definition
- Which organism or specimen and which side does this crest belong to? provenance
Extent and subregions
Separates the whole crest from its endpoints and local surface regions.
Crest endpoints and lips
Bound the crest using the superior iliac spines and distinguish its external lip, intermediate zone, and internal lip.
- Where are the anterior and posterior superior iliac spines relative to the represented crest? boundary
- Does the observation concern the whole crest, a particular lip, the intermediate zone, or the iliac tubercle? boundary
Crest form and development Describes crest geometry and the developmental state of its apophysis.
Regional geometry
Captures reproducible measurements along the curved iliac rim.
Crest geometry measurement
Describe crest length, local width, and curvature using an explicit path and coordinate frame.
- Which endpoints and surface path define the measured crest arc? measurement
- How were local width or curvature measured, and what uncertainty follows from image resolution or specimen condition? measurement
Apophyseal maturation
Records ossification and fusion separately from chronological age or inferred skeletal maturity.
Iliac apophysis state
Document the visible extent of apophyseal ossification and fusion without assigning unsupported age thresholds.
- Which portions of the crest apophysis are visibly ossified and which are fused to the ilium? measurement
- If a Risser stage is recorded, which staging convention and imaging evidence support it? provenance
Crest attachments and localization Relates crest surfaces to their soft-tissue attachments and observable landmark positions.
Attachment topography
Maps named muscle and fascial attachments to specific crest regions.
Regional soft-tissue attachments
Record attachment locations for abdominal-wall muscles and other associated structures, distinguishing reference anatomy from specimen observations.
- Which crest regions are associated with external oblique, internal oblique, and transversus abdominis attachments in the consulted reference? provenance
- Which additional muscle or fascial attachments are documented at the represented segment? boundary
Landmark localization
Connects palpable or imaged landmarks to a documented position and posture.
Crest position and palpability
Record how the crest was localized and avoid treating a line between the crests as an invariant vertebral-level marker.
- Which crest point was identified, by what method, and in what body position? measurement
- If an intercristal line is used, how was its relationship to vertebral level verified in this individual? measurement
Crest condition and intervention context Records local structural changes and the anatomical evidence relevant to potential clinical use.
Local integrity
Describes disruption and other observed changes with precise anatomical localization.
Crest disruption or alteration
Locate cortical discontinuity, apophyseal separation, or other alteration and preserve uncertainty about its cause.
- What disruption or alteration is observed, and which crest segment and surfaces does it involve? measurement
- What evidence distinguishes injury from an unfused apophysis, anatomical variation, or a previous procedure? provenance
Procedural site context
Documents prior use and unresolved anatomical requirements for any proposed intervention.
Crest site history and assessment
Associate a proposed or previous biopsy or graft-harvest site with the correct crest region and available clinical evidence.
- Has this crest undergone biopsy, graft harvesting, or another procedure, and what record establishes the location? provenance
- What additional imaging or clinician assessment is required to evaluate the proposed site and adjacent structures? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
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.
- Which of these check these first hold for the sense of iliac crest this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of iliac crest this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of iliac crest 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.
- Which of these failure modes and hazards hold for the sense of iliac crest 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.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of iliac crest this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
- Other names and narrower kinds
- Left iliac crest, Right iliac crest
What it is Filled
The iliac crest is the thickened, curved superior border of the ilium, extending between the anterior and posterior superior iliac spines and providing attachment for muscles and fascia of the trunk and hip.
In scope
- Left or right iliac crest and its continuity between the anterior and posterior superior iliac spines
- External lip, intermediate zone, internal lip, and iliac tubercle
- Crest-specific muscle and fascial attachment regions
- Apophyseal development and fusion
- Local surface integrity, injury, and procedural alteration
- Identification and localization by examination or imaging
Out of scope
- The complete ilium, hip bone, or pelvic ring
- The acetabulum and sacroiliac joint as independent structures
- Whole muscles, fasciae, nerves, and vessels associated with the crest
- Systemic skeletal disease and whole-person diagnoses
- Bone marrow, harvested graft material, and their laboratory characteristics
- Biopsy, graft harvesting, and treatment protocols
Why it exists Filled
Enable an agent to identify an iliac crest, describe its anatomical relationships and observed condition, and assess whether evidence supports its use as a landmark or procedural site.
Distinguishing features Filled
- Forms the superior curved rim of the iliac wing rather than its broad internal or external surface.
- Extends between the anterior superior and posterior superior iliac spines; either spine alone is an endpoint landmark, not the entire crest.
- Has external and internal lips with an intermediate zone, distinguishing the crest region from the iliac fossa.
- Includes the iliac tubercle on its external lip; this tubercle is distinct from the femoral greater trochanter.
- Belongs to the ilium, distinguishing it from the sacral crests and other palpable ridges around the pelvis.
What robots and AI may and may not do Filled
Must not
- Perform or guide a needle procedure, such as a bone marrow sample, at the iliac crest.
- Diagnose a fracture, bruise or bone condition of the iliac crest in a particular person.
- Touch or palpate a person's hip region without their consent.
- Present identifiable patient images or scans of the pelvis without consent.
Only with a human decision
- Any clinical procedure at the iliac crest, such as a marrow biopsy or bone graft harvest.
May
- Describe the iliac crest and its muscle attachments from reliable anatomical sources.
- Use the iliac crest as a surface landmark in fitting guidance, such as belts, harnesses or protective gear, on a person's request.
Moral aspects Filled
- Procedures at the iliac crest are invasive and painful and require informed consent.
- Contact with the hip region touches on bodily privacy.
Who is affected
- Patients
- Athletes with hip injuries
- Clinicians
Owners Filled
Steward
Nobody owns it; it is part of each person's body, and the treating clinician answers for its care.
Links to other meta-models Filled
parent
- Q112826975 - registry parent class
- Q66560030 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.iliac-crest
- Wikidata: Q3774464 (https://www.wikidata.org/wiki/Q3774464)
Direct properties required Filled
- Anatomical bearer and laterality: Referenced organism or specimen; species; left or right ilium; unknown if unresolved
- Crest region: Anterior, middle, or posterior segment; external lip, intermediate zone, or internal lip; named landmark where applicable
- Endpoint identification: Anterior and posterior superior iliac spines each identified, uncertain, or not assessable
- Crest geometry: Arc length and local width in mm; curvature in mm^-1; measurement path and imaging plane required
- Apophyseal maturation: Not ossified, partly ossified, ossified but unfused, partly fused, fused, or indeterminate; staging method recorded if used
- Local structural integrity: No disruption observed, fracture, apophyseal separation, postoperative defect, other alteration, or indeterminate
- Attachment relationship: Named muscle or fascial structure linked to a specified crest region, with evidence source
- Localization evidence: Palpation, radiograph, CT, MRI, direct inspection, or other documented method
Recognition required Filled
- The curved upper edge of the hip bone that can be felt at the waist on each side.
- Runs from a bony point at the front of the hip to one at the back near the dimples of the lower back.
Capabilities and actions required Filled
- Identify and label a crest and its side on a specimen or image.
- Map a local observation to a crest segment, lip, or endpoint landmark.
- Compare crest geometry across sides or time using a consistent coordinate system.
- Record apophyseal maturation while preserving the staging method and uncertainty.
- Associate a local injury or procedural defect with supporting observations.
- Flag missing localization or anatomical evidence before a clinician assesses landmark or procedural suitability.
Hazards and failure modes required Filled
- A direct blow can bruise the crest and attached muscles, an injury known in sport as a hip pointer.
- Bone taken from the crest for grafts can leave lasting pain at the donor site.
Standards and interfaces required Filled
- Terminologia Anatomica, issued by the Federative International Programme for Anatomical Terminology, standardizes the anatomical name crista iliaca.
Context of use required Filled
- The iliac crest is encountered in anatomy education, physical examination and imaging of the pelvis.
- It serves as a landmark for describing pelvic position and muscle attachments and is relevant to bone graft harvesting and bone marrow sampling.
Sources Filled
- Wikidata item Q3774464: iliac crest - identity and sense of the item
- Wikipedia: Iliac crest - general description of the item
Open questions
- Should this registry entry remain human-specific or support comparative anatomy through explicit species profiles?
- Which authoritative anatomical references should govern regional attachment boundaries and terminology?
- Which measurement conventions and reference populations support meaningful comparisons of crest geometry and asymmetry?
- Which iliac apophyseal staging conventions must be supported, and how should differences between them be represented?
- What evidence criteria should distinguish developmental appearance, local injury, and postoperative change when observations are incomplete?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q3774464/spec.json