thoracic diaphragm
Enable an agent to recognise a thoracic diaphragm, record its anatomy and respiratory function, assess documented changes, and identify what further observation or specialist assessment is needed.
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 agent to recognise a thoracic diaphragm, record its anatomy and respiratory function, assess documented changes, and identify what further observation or specialist assessment is needed.
The thoracic diaphragm is a dome-shaped musculotendinous partition between the thoracic and abdominal cavities in mammals whose contraction increases thoracic volume and provides the principal muscular action for inspiration.
It can be Identify and annotate diaphragm regions, attachments and passage relationships in anatomical records or imaging.; Compare side-specific motion and thickness observations acquired under stated conditions.; Link activation, pressure and movement evidence to assess whether a functional interpretation is supported.; Record the location and extent of a documented defect or altered configuration.; Track changes before and after a documented intervention using comparable observations.; Flag missing evidence and formulate questions for qualified anatomical or clinical review..
Distinguishing features
Occupies the thoracoabdominal boundary, distinguishing it from the pelvic diaphragm at the pelvic outlet.
Combines skeletal muscle with a central tendon, distinguishing it from a passive serous membrane such as the pleura.
Has peripheral attachments and a domed resting configuration rather than the segmental arrangement of intercostal muscles.
Changes configuration during contraction and contributes to inspiration, distinguishing it from a fixed partition.
Has characteristic passage relationships with the oesophagus, major vessels and other structures; an opening must be distinguished from a pathological discontinuity.
Scope
+ Muscular portions, central tendon, hemidiaphragms and their attachments
+ Separation of thoracic and abdominal compartments and structures passing through or behind the diaphragm
+ Diaphragmatic contraction, excursion, thickening and contribution to pressure generation
+ Phrenic motor supply and coordination with respiratory activity
+ Developmental variation, structural defects and documented functional impairment
- The whole organism, its taxonomy and population conservation status
- Lung tissue, airways, pleura and gas exchange as independently modelled systems
- The pelvic diaphragm and other anatomical structures called diaphragms
- The complete nervous system and central control of breathing
- Diaphragmatic hernia, neuromuscular disease and other disorders as independent disease models
- Ventilators, imaging devices and surgical procedures as independently modelled tools or interventions
Characteristics
- Anatomical subject
- Individual organism; species; life stage Determines which anatomical reference and developmental expectations apply.
- Region and laterality
- Whole diaphragm; right or left hemidiaphragm; muscular portion; central tendon; specified attachment or opening Localises observations and prevents unilateral findings from being attributed to the whole structure.
- Attachment configuration
- Observed sternal, costal and lumbar attachment relationships, qualified by species Supports identification and interpretation of force transmission or disrupted continuity.
- Thickness
- mm, with region, respiratory phase, posture and method Permits contextual comparison of muscle dimensions without mixing incompatible observations.
- Respiratory excursion
- mm or cm, with side, direction, manoeuvre, posture and measurement method Describes movement while preserving the conditions needed to interpret it.
- Thickening fraction
- %, with measured thicknesses, calculation convention and breathing manoeuvre Records relative thickness change without treating it as a context-free measure of strength.
- Transdiaphragmatic pressure
- cmH2O, with abdominal and thoracic pressure methods, sign convention and manoeuvre Characterises pressure generation and separates measured quantities from inferred performance.
- Motion pattern
- Direction, amplitude, symmetry and timing; reduced, absent or paradoxical motion when supported; unknown Captures functional observations without automatically assigning a cause.
- Structural continuity
- Intact; defect documented; indeterminate, with location and extent Distinguishes structural disruption from altered position or impaired movement.
- Motor supply relationship
- Right and left phrenic nerve relationships; documented integrity or uncertainty Connects observed activation to its motor pathway while keeping nerve and muscle findings distinct.
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.
Anatomical identity and attachments Establishes which diaphragm is represented and how its constituent regions connect to the body.
Identification depends on thoracoabdominal position and musculotendinous organisation, with species-specific anatomical detail.
Subject and part boundaries
Anchors the diaphragm to an individual and distinguishes whole-structure records from regional observations.
Diaphragm subject and region
Record species, developmental stage, laterality and the exact anatomical extent represented.
- Which individual, species and developmental stage does this diaphragm record describe? provenance
- Does the observation concern the whole diaphragm, one hemidiaphragm or a named muscular or tendinous region? boundary
Muscle, tendon and anchorage
Represents muscular portions, the central tendon and peripheral attachments.
Attachment and tendon configuration
Describe observed continuity between muscular regions, the central tendon and skeletal attachment sites.
- Which muscular portions, crura and central tendon boundaries are identifiable in the available evidence? definition
- Which attachment relationships are observed, and which are assumed from a species-specific reference? provenance
Compartment boundary and passages Models the diaphragm's partitioning role and its relationships with structures crossing the thoracoabdominal boundary.
Normal passage anatomy must remain distinguishable from defects and displacement of neighbouring organs.
Surfaces and adjacencies
Locates thoracic and abdominal surfaces and relevant neighbouring structures.
Dome position and organ relations
Record dome configuration and adjacent organs without assigning those organs to the diaphragm.
- What are the positions and contours of the two domes under the recorded posture and respiratory phase? measurement
- Which observed relationships involve diaphragm tissue, and which involve adjacent pleura, pericardium or abdominal organs? boundary
Normal passages and discontinuities
Distinguishes expected openings and posterior passage routes from abnormal tissue gaps.
Passage route identification
Identify relationships with the oesophagus, vena cava and aorta using an appropriate anatomical reference.
- Which structure uses each identified opening or posterior route, and what diaphragm tissue bounds that route? boundary
- What evidence distinguishes a normal passage or anatomical variant from a pathological defect? provenance
Respiratory mechanics Connects diaphragm deformation and pressure generation to explicitly recorded breathing conditions.
Position, movement, contraction and mechanical contribution are related observations but cannot substitute for one another.
Excursion and thickening
Records regional movement and thickness changes across the respiratory cycle.
Phase-resolved diaphragm motion
Preserve side, sampling location, respiratory phase and manoeuvre for every movement or thickness measurement.
- What excursion and thickness change were measured on each assessed side, and during which breathing manoeuvre? measurement
- How were posture, respiratory phase, ventilatory assistance and measurement location recorded? provenance
Pressure and mechanical context
Relates diaphragm activity to pressure differences and interaction with the chest wall and abdomen.
Pressure-generation evidence
Record pressure measurements and loading conditions separately from interpretations of diaphragm strength.
- Were thoracic and abdominal pressures measured, and how was transdiaphragmatic pressure calculated? measurement
- What evidence separates active diaphragm contribution from passive displacement or externally assisted inflation? boundary
Motor activation and coordination Represents phrenic motor input and the timing of diaphragm activity within breathing.
Impaired movement can reflect different neural, muscular or mechanical circumstances that require distinct evidence.
Phrenic motor interface
Links each hemidiaphragm to documented motor pathway observations.
Side-specific motor supply
Associate phrenic nerve evidence with the corresponding diaphragm region while preserving uncertainty about causation.
- What anatomical or functional evidence is available for the phrenic motor supply on each side? provenance
- Does the evidence localise a problem to nerve, muscle or neither? boundary
Activation and motion timing
Compares diaphragm activation with airflow, respiratory phase and movement.
Activation-mechanical coupling
Keep electrical activation, tissue movement and pressure generation as separate signals whose timing can be compared.
- How does recorded activation align with inspiration, expiration and diaphragm movement? measurement
- What additional observation would clarify a mismatch between activation and mechanical response? action
Development, integrity and change Captures developmental context, structural abnormalities and longitudinal functional observations.
An elevated, discontinuous or poorly moving diaphragm requires different descriptions and should not receive a diagnosis from appearance alone.
Developmental and structural state
Describes tissue formation, continuity and configuration with evidence for congenital or acquired origin.
Defect versus altered configuration
Record a tissue defect separately from elevation or altered contour, and link diagnoses only when supported.
- Is tissue continuity preserved, and what are the location and dimensions of any documented defect? measurement
- What evidence supports developmental variation, congenital abnormality, acquired injury or an unresolved origin? provenance
Functional change and review
Tracks observed impairment, recovery and intervention-associated changes under comparable conditions.
Longitudinal diaphragm state
Compare dated structural and functional observations while retaining measurement limitations and unresolved explanations.
- Which changes in continuity, excursion, thickening or pressure generation remain after accounting for differences in measurement conditions? measurement
- Which unresolved findings require further observation or qualified review before an intervention is considered? 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.
- The definition covers mammalian anatomy; nomenclature and clinical examples here primarily concern humans.
- Sternal, costal and lumbar portions are anatomical components, not separate kinds of diaphragm.
- No numerical measurement ranges are supplied because thickness and excursion depend on breathing maneuver, posture, measurement method and population.
- Which of these check these first hold for the sense of thoracic diaphragm 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 - Diaphragma - Latin anatomical name for the human diaphragm.
- Which of these identifiers and schemes hold for the sense of thoracic diaphragm 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 human anatomical nomenclature.
- Which of these standards and regulation hold for the sense of thoracic diaphragm this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Provides the principal muscular action for quiet inspiration.
- Works with abdominal muscles to raise intra-abdominal pressure during expulsive efforts.
- Contributes to trunk stabilization through coordinated respiratory and abdominal muscle activity.
- Its crural portion contributes to the barrier against gastroesophageal reflux.
- Which of these real-world use hold for the sense of thoracic diaphragm 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.
- Phrenic nerve injury can cause weakness or paralysis of one or both hemidiaphragms.
- Congenital diaphragmatic hernia can permit abdominal organs to enter the thorax and impair fetal lung development.
- Traumatic rupture can allow abdominal organs to herniate into the thorax.
- Diaphragmatic eventration produces abnormal elevation of an intact but deficient or weakened diaphragm.
- Hiatal hernia involves displacement of abdominal structures through the esophageal hiatus and can contribute to reflux.
- Which of these failure modes and hazards hold for the sense of thoracic diaphragm 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.
- Pelvic diaphragm - Forms much of the muscular pelvic floor rather than separating the thorax from the abdomen.
- Intercostal muscles - Occupy spaces between ribs and move or stabilize the rib cage rather than forming the thoracoabdominal partition.
- Central tendon of the diaphragm - Is the noncontractile aponeurotic component of the diaphragm, not the entire musculotendinous structure.
- Phrenic nerve - Supplies motor innervation to the diaphragm; it is a nerve rather than the muscle it controls.
- Hemidiaphragm - Denotes the right or left half of the diaphragm rather than the complete structure.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of thoracic diaphragm this model covers, and on what evidence? provenance
What the second pass must settle
- Does the registry intend this entry to cover mammalian thoracic diaphragms generally or specifically human anatomy?
- Which species-specific anatomical references should establish attachment, passage and developmental terminology?
- Which reference ranges and acquisition protocols are suitable for excursion, thickness, thickening fraction and pressure measurements across life stages?
- What evidence standards should distinguish weakness, paralysis, eventration, rupture and herniation without inferring a diagnosis from a single observation?
- Does an existing Vercy world model already own this anatomical concept, requiring this registry entry to link to that publication?