forehead
Enable an agent to recognise a forehead, record its observable form and condition, and determine which observations or interactions are appropriate within the available evidence and permissions.
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.
Researched by: Codex
Purpose and description
Enable an agent to recognise a forehead, record its observable form and condition, and determine which observations or interactions are appropriate within the available evidence and permissions.
It can be Locate and annotate the forehead using declared boundaries and visible landmarks.; Measure its dimensions or contour when scale, pose and landmarks support the measurement.; Record and compare local surface features under documented observation conditions.; Observe forehead changes at rest and during a permitted, requested brow movement.; Record an authorised local sensor reading with its acquisition method and limitations.; Determine whether a proposed forehead observation or contact must wait for permission, clearer access or an external procedure assessment..
Distinguishing features
Locate the candidate region above the eyebrows on the front of the head; exclude the eyebrows and eyelids themselves.
Distinguish the upper forehead boundary from the scalp using a declared anatomical or visible-landmark convention; do not let a fringe or head covering define the boundary.
Distinguish lateral forehead from temple using recorded landmarks and a stated boundary convention rather than an unexplained crop.
Distinguish the forehead region from its skin or underlying bone: a surface mark or bone observation concerns an aspect of the region, not the entire thing.
Treat the space between the eyebrows explicitly as included, excluded or unresolved under the selected boundary convention.
Scope
+ Identification and delineation of the forehead on a particular person
+ Forehead height, width, contour and visible asymmetry under a stated measurement method
+ Local skin appearance, surface features and reported sensations
+ Forehead movement and surface changes during recorded facial actions
+ Accessibility, observation conditions and constraints on local contact
- The person's identity, overall health and consent capacity
- The scalp and hair as anatomical regions or structures in their own right
- Eyebrows, eyelids, eyes and the nose as independently modelled structures
- The skull, brain and internal head anatomy
- Diagnosis of skin disease, headache or neurological conditions
- Products, instruments and clinical procedures used on the forehead
Characteristics
- Person and head association
- Reference to the person and head bearing this forehead Keeps observations attached to the correct anatomical instance.
- Boundary convention
- Named convention or explicit landmark description, with unresolved segments Makes region identification and measurements comparable.
- Forehead height
- mm between declared upper and lower landmarks; unavailable when landmarks or scale are insufficient Records vertical extent without treating an ambiguous hairline as a fixed anatomical boundary.
- Forehead width
- mm between declared lateral landmarks at a specified level Supports comparison only when the location and measurement method are known.
- Contour and asymmetry
- Observed contour description, side differences, viewing angle and confidence Separates persistent shape from apparent differences caused by pose or lighting.
- Surface feature distribution
- Localised descriptions of lines, marks, scars, discolouration or surface disruption Allows specific features to be located and compared over time without assigning a diagnosis.
- Movement context
- At rest, requested brow movement, spontaneous movement or unknown Distinguishes resting appearance from changes associated with facial action.
- Reported local sensation
- Person-reported sensation, location, onset and optional stated severity scale Preserves subjective information separately from visible findings.
- Local temperature reading
- °C or °F with device, mode, site, time and acquisition conditions Keeps a forehead-site reading tied to its method and prevents unsupported interpretation as core body temperature.
- Exposure and contact availability
- Visible, partly obscured or obscured; contact permission granted, denied or unknown Determines what can be observed or touched without assuming access or permission.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 17 questions.
Forehead identity and boundaries Establish which forehead is being represented and how its extent is determined.
Hairline visibility and transitions into the temples and brow region can make otherwise plausible forehead observations refer to different areas.
Anatomical association
Connect the region to its bearing head and distinguish it from adjacent regions.
Identified forehead region
Record the evidence used to identify the region as a forehead on this head.
- Which person's head bears this forehead? provenance
- Which visible landmarks establish that this is the region above the eyebrows on the front of the head? definition
Regional limits
Make the upper, lower and lateral limits explicit.
Declared forehead extent
Record the boundary convention and any segments that cannot be located reliably.
- What landmarks or convention delimit the forehead from scalp, temples and eyebrows, including the space between the eyebrows? boundary
- Where hair loss, hair coverage or an indistinct transition obscures a boundary, what remains unresolved? boundary
Forehead form and motion Represent forehead dimensions, contour and changes during facial action.
Forehead proportions and lines depend on landmark selection, head pose and brow movement, so shape observations need their acquisition context.
Dimensions and contour
Capture measured extent and observed surface shape.
Landmarked form
Describe forehead height, width and contour with enough context to assess comparability.
- Between which landmarks, and by what calibrated method, were forehead height and width measured? measurement
- What contour or left-right difference is observable, and how were head pose and viewing angle recorded? measurement
Expression-dependent appearance
Separate resting surface appearance from changes during brow movement.
Forehead motion observation
Record visible movement and line changes without inferring emotion or neurological status.
- Was the forehead observed at rest, during a requested brow action or during spontaneous movement? provenance
- Which forehead lines or surface positions changed during the recorded action, and were both sides visible? measurement
Forehead surface and local condition Capture local appearance, reported sensations and changes through time.
An agent must distinguish an observed forehead feature from a symptom report, an acquisition artefact or an unsupported explanation.
Surface observation
Locate and describe visible forehead features.
Localised surface features
Record features such as lines, marks, apparent swelling or surface disruption without diagnosing their cause.
- What feature is visible, and where is it relative to the declared forehead landmarks? measurement
- Could lighting, cosmetics, sweat, hair or image processing affect the recorded appearance? provenance
Sensation and change
Record person-reported experiences and supported temporal comparisons.
Local condition history
Keep reported sensations and observed changes distinct while relating both to the same forehead location.
- What sensation does the person report at the forehead, at which location and with what reported onset? provenance
- What has changed relative to a dated earlier observation, and are expression, lighting and viewpoint sufficiently comparable? measurement
Forehead access and interaction Support decisions about exposing, observing, measuring or contacting the forehead.
The forehead is a body region whose visibility does not establish permission to touch it, and whose sensor readings depend on the particular acquisition method.
Exposure and permission
Record visibility and authorisation for the proposed local interaction.
Forehead interaction readiness
Identify whether the target area is accessible and whether the intended action is authorised.
- Which part of the forehead is obscured by hair, clothing, a dressing or another covering? boundary
- Is the proposed observation, covering adjustment or contact authorised for this person and this forehead site? action
- Which recorded local features or reported discomfort require assessment under the proposed procedure before contact proceeds? action
Site-specific measurement
Tie readings taken at the forehead to their instruments and intended interpretation.
Forehead reading context
Preserve the acquisition context of a forehead-site sensor reading and identify limits on its use.
- What quantity was measured at which forehead location, using which device, mode, units and acquisition conditions? measurement
- What device instructions or applicable protocol establish whether this forehead reading is usable for the proposed decision? action
What the second pass must settle
- Which anatomical boundary convention should Vercy adopt for the forehead, particularly at the temples and the space between the eyebrows?
- How should forehead extent and height be represented when the hairline is absent, receded, altered or obscured?
- Which landmark and acquisition methods provide sufficiently repeatable forehead dimensions and contour comparisons for the intended tasks?
- What observation vocabulary can describe forehead surface features consistently across skin appearances and imaging conditions without implying diagnosis?
- Which externally maintained device and procedure models should govern forehead sensing, contact suitability and interpretation of local readings?