lambda
Let an agent explain the lambda as a skull landmark, relay its position and uses in anatomy, anthropology and surgery from reference sources, and keep it apart from the Greek letter and other senses of the word.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Landmark What and where it is.
Position
Location on the skull.
Position
Location on the skull.
- Where on the skull is the lambda, and which sutures meet there? definition
- Which bones border it? definition
Name
Origin of the term.
Name
Origin of the term.
- Why is the point named after the Greek letter? provenance
- What is its entry in international anatomical terminology? provenance
Development From fontanelle to landmark.
Fontanelle
The infant state.
Fontanelle
The infant state.
- How does the posterior fontanelle relate to the lambda? boundary
- When does it usually close, according to clinical references? measurement
Variation
Sutural bones and variants.
Variation
Sutural bones and variants.
- Which sutural bones occur near the lambda? provenance
- How are they told from fractures? boundary
Measurement Use as a reference point.
Craniometry
Anthropological measurement.
Craniometry
Anthropological measurement.
- Which skull measurements use the lambda as an end point? measurement
- Which reference defines those measurements? provenance
Stereotaxy
Reference in surgery and research.
Stereotaxy
Reference in surgery and research.
- How is the lambda used together with bregma as a reference in stereotaxic work? action
- Is the context human or animal research? boundary
Disambiguation Other senses of lambda.
Letter
The Greek letter.
Letter
The Greek letter.
- Is the text about the anatomical point or the letter? boundary
- Which entry fits the letter sense? action
Other uses
Scientific and technical senses.
Other uses
Scientific and technical senses.
- Which other scientific senses of lambda could be confused with this one? boundary
- How should the reader be redirected? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.LIV
What it is Filled
In anatomy, the lambda is the craniometric point on the back of the skull where the sagittal suture meets the lambdoid suture, between the two parietal bones and the occipital bone; in infants it marks the site of the posterior fontanelle.
Why it exists Filled
Let an agent explain the lambda as a skull landmark, relay its position and uses in anatomy, anthropology and surgery from reference sources, and keep it apart from the Greek letter and other senses of the word.
Distinguishing features Filled
- At the back of the skull, unlike the bregma at the front of the sagittal suture
- A point, not a suture or a bone
- The adult landmark, distinct from the infant fontanelle at the same site
- Anatomical sense, unlike the Greek letter it is named after
What robots and AI may and may not do Filled
Must not
- Interpret a person's skull imaging as a diagnosis.
- Give surgical guidance for a specific patient.
- Handle human remains or images of them without regard to consent and dignity.
Only with a human decision
- Clinical interpretation of fontanelle or skull findings in a patient.
May
- Explain the landmark and cite the anatomical reference used.
- Help learners locate it on models and images.
Moral aspects Filled
- Study of human remains requires respect and lawful provenance.
- Infant skull findings cause parental anxiety and need clinical, not automated, judgement.
Who is affected
- Patients and infants
- Descendant communities of studied remains
- Students
Owners Filled
Steward
Nobody: an anatomical landmark; anatomical terminology bodies maintain its name.
Master systems
- Terminologia Anatomica
Links to other meta-models Filled
parent
- Q66603128 - registry parent class
related
- craniometric point
- bregma - the landmark at the other end of the sagittal suture
- lambda (letter) - the Greek letter it is named after
contains
- sagittal suture - one of the sutures that meet there
- lambdoid suture - the other suture that meets there
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.lambda
- Wikidata: Q4927079 (https://www.wikidata.org/wiki/Q4927079)
- Wikidata: Q4927079 registry item
Direct properties required Filled
- kind: craniometric landmark note
- location: posterior skull midline note
- bones meeting: two parietal bones and the occipital bone note
Recognition required Filled
- Junction of the midline sagittal suture with the lambdoid suture
- Located at the back of the skull, behind and below the vertex
- Upside-down V pattern of sutures like the letter lambda
- A point at the top of the back of the skull where the midline suture meets a pair of sutures running down and outward, together forming a shape like the Greek letter lambda.
Capabilities and actions required Filled
- locate the landmark on the skull
- explain its relation to the sutures and bones around it
- relate it to the posterior fontanelle
- explain its use as a reference point in measurement
- distinguish it from the bregma and other landmarks
Hazards and failure modes required Filled
- Confusing lambda with bregma in measurement or surgical planning
- Extra sutural bones near the lambda can be mistaken for fractures
- Mixing up the anatomical and other senses of the word
Standards and interfaces required Filled
- Terminologia Anatomica, the international anatomical terminology
Context of use required Filled
- lambda in the adult skull
- posterior fontanelle in the infant
- lambda as a reference point in animal stereotaxy
Sources Filled
- Wikidata item Q4927079: lambda - identity and sense of the item
- Wikipedia: Lambda (anatomy) - general description of the item
Open questions
- Should the posterior fontanelle be a separate linked entry?
- How should variation in its position between individuals be recorded?
- How should animal and human uses of the landmark be separated?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q4927079/spec.json