perimysium
Enable an agent to identify perimysium, assess its organization and condition, and select justified observations or analyses of its role within skeletal muscle.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 16 findings · 29 questions
Fascicular identity Establish which connective tissue region qualifies as perimysium.
Fascicle enclosure
Recognize the tissue through its relationship to muscle fiber groups.
Boundary around fiber groups
Use the enclosed anatomical unit to distinguish a perimysial boundary from an individual fiber sheath.
- Does this connective tissue region surround or separate a recognizable group of muscle fibers? definition
- What image or anatomical observation distinguishes it from endomysium? boundary
Regional localization
Place the identified perimysium within a particular muscle.
Host and position
Attach the observation to its host muscle and sampled location.
- Which species, specimen, muscle, and intramuscular region supplied this observation? provenance
- Is the region internal to the muscle, near its surface, or near an attachment interface? boundary
Matrix architecture Describe the geometry and material organization of the perimysial network.
Network geometry
Measure perimysial extent and spatial organization.
Thickness and connectivity
Record local thickness and observed continuity without inferring a complete network from a single section.
- What thickness distribution is measured across specified perimysial boundaries? measurement
- Which apparent junctions or discontinuities are confirmed in serial sections or a three-dimensional volume? measurement
Collagen and constituents
Characterize matrix composition and collagen arrangement with localized evidence.
Localized matrix evidence
Keep constituent identification separate from architectural measurement and from bulk muscle composition.
- Which matrix constituents were demonstrated specifically within the perimysial region, using which assays? provenance
- What collagen orientation and waviness are observed relative to the local fascicle axis? measurement
Connective tissue interfaces Map perimysial relationships with neighboring tissues and structures.
Matrix transitions
Trace transitions between perimysium and other connective tissue compartments.
Interface attribution
Record observed continuity and preserve uncertainty where compartment boundaries cannot be resolved.
- Where can this perimysial region be traced toward endomysium, epimysium, tendon, or aponeurosis? boundary
- What tracing or imaging evidence supports each claimed connection? provenance
Associated structures
Locate vessels, nerves, or other structures relative to identified perimysial tissue.
Local structure relations
Describe associated structures without treating their own connective tissue coverings as automatically perimysial.
- Which identified vessels or nerves lie within or alongside this perimysial region? measurement
- How were vascular walls or nerve sheaths excluded from perimysial segmentation? boundary
Fascicle mechanics Evaluate perimysial deformation and evidence for its mechanical contribution.
Interfascicular deformation
Observe relative movement of fascicles and deformation of their separating tissue.
Shear and extension
Perimysial mechanics should distinguish accommodation of interfascicular movement from evidence of force transmission; their relative contributions remain context dependent. See [intramuscular connective tissue function review](https://pmc.ncbi.nlm.nih.gov/articles/PMC7248366/).
- How much relative fascicle displacement and perimysial strain occur under the recorded loading condition? measurement
- Were observations made during passive stretch, active contraction, or another specified condition? provenance
Mechanical attribution
Determine which conclusions a test supports about perimysium itself.
Test-specific load evidence
Separate measured tissue response from a proposed perimysial contribution to whole-muscle behavior.
- Does the test measure isolated perimysial tissue, a fascicle bundle, or whole muscle? boundary
- What controls or model assumptions support assigning the response to perimysium? provenance
- Which additional measurement would distinguish competing explanations of the observed load transfer? action
Condition and observation Assess perimysial alterations while accounting for sampling and preparation.
Remodeling and disruption
Describe changes relative to an appropriate anatomical comparison.
Supported condition assessment
Record thickening, altered organization, cellular changes, or disruption as observations before assigning a pathological interpretation.
- Which perimysial features differ from anatomically and methodologically matched reference tissue? measurement
- What evidence separates remodeling or injury from regional variation and preparation damage? boundary
- What additional localized assay or expert assessment is needed before interpreting the alteration? action
Preparation and resolution
Determine whether the specimen and method support the claimed perimysial observation.
Measurement fitness
Retain preparation, orientation, resolution, and segmentation information alongside each tissue measurement.
- What fixation, sectioning, staining, and tissue length conditions were used? provenance
- Can the image resolution and section orientation distinguish the measured perimysium from adjacent tissue? measurement
- Should the region be reimaged, resampled, or marked unresolved before comparison? 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 perimysium this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these standards and regulation hold for the sense of perimysium 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 perimysium this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these typical measurements hold for the sense of perimysium 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 perimysium 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 perimysium 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.LIV
What it is Filled
Perimysium is the collagen-rich connective tissue of skeletal muscle that surrounds and separates muscle fascicles, supports larger intramuscular nerves and blood vessels, and contributes to force transmission.
In scope
- Perimysial boundaries and networks around muscle fascicles
- Local collagen architecture and extracellular matrix composition
- Connections with adjacent intramuscular connective tissue and attachment structures
- Perimysial deformation and contributions to muscle mechanics
- Regional remodeling, damage, and specimen-dependent observations
Out of scope
- Individual muscle fiber contractile machinery
- Endomysium surrounding individual muscle fibers
- Epimysium surrounding the whole muscle
- Tendon, aponeurosis, and deep fascia as independently modeled structures
- Blood vessels and nerves as independently modeled structures
- Whole-muscle disease diagnosis and treatment planning
Why it exists Filled
Enable an agent to identify perimysium, assess its organization and condition, and select justified observations or analyses of its role within skeletal muscle.
Distinguishing features Filled
- Identify connective tissue around groups of muscle fibers forming fascicles; tissue immediately surrounding individual fibers belongs to endomysium. See [muscle extracellular matrix architecture review](https://pmc.ncbi.nlm.nih.gov/articles/PMC10635663/).
- Establish an internal fascicular boundary rather than the outer envelope of the entire muscle, which is epimysium.
- Distinguish the connective tissue boundary from the fascicle's enclosed contractile fibers.
- At an attachment interface, require anatomical tracing to distinguish perimysium from tendon or aponeurosis; collagen staining alone does not establish identity.
What robots and AI may and may not do Filled
Must not
- Interpret a person's muscle biopsy or scan as a diagnosis.
- Use human tissue samples outside the consent under which they were taken.
- Give advice on treating a muscle injury or disease as if it were medical care.
Only with a human decision
- Discussing findings in a person's own biopsy or imaging report.
May
- Describe perimysium and its role in muscle structure from anatomy sources.
- Annotate tissue images for teaching or research when the samples were lawfully obtained.
Moral aspects Filled
- Human tissue comes from people who have rights over how it is used.
- Health information drawn from tissue is private.
Who is affected
- Patients and tissue donors
- People with muscle diseases
- Researchers
Owners Filled
Steward
Nobody owns it as a structure; the clinic or biobank answers for a stored sample.
Master systems
- Biobank sample registers
Links to other meta-models Filled
parent
- Q6036578 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.perimysium
- Wikidata: Q3543470 (https://www.wikidata.org/wiki/Q3543470)
Direct properties required Filled
- Host muscle and sampled region: Species, individual or specimen identifier, named muscle, side, depth, and longitudinal position
- Fascicular boundary assignment: Confirmed perimysium; probable perimysium; mixed interface; unresolved
- Perimysial thickness: Micrometers, with sampling locations, section orientation, and summary distribution
- Perimysial area fraction: Percent of an explicitly defined muscle section or region
- Collagen orientation: Angular distribution in degrees relative to the local fascicle axis, with acquisition method
- Matrix constituent evidence: Identified constituent, assay, localization, and detected, not detected, or unresolved status
- Mechanical response: Stress in kPa or MPa, dimensionless strain, and modulus in kPa or MPa, with loading mode and protocol
- Observed tissue condition: Record continuity, thickening, disruption, cellular changes, and indeterminate features separately
Recognition required Filled
- Thin sheets of connective tissue that wrap bundles of muscle fibres in a cross-section.
- Visible in meat as the fine white lines separating muscle bundles.
Capabilities and actions required Filled
- Annotate perimysial boundaries in muscle sections or three-dimensional image volumes.
- Select anatomically matched regions for thickness, area fraction, and collagen orientation measurements.
- Trace interfaces with endomysium, epimysium, and attachment structures.
- Compare perimysial organization across specimens using compatible preparation and measurement methods.
- Design or interpret mechanical measurements with explicit tissue attribution limits.
- Flag unresolved remodeling or damage for additional imaging, assays, or expert review.
Hazards and failure modes required Filled
- Fibrosis or inflammation of the perimysium occurs in some muscle diseases.
- Misinterpreted tissue findings can delay correct diagnosis.
Standards and interfaces required Filled
- Terminologia Histologica, issued by the Federative International Committee on Anatomical Terminology, provides standardized histological nomenclature for perimysium.
Context of use required Filled
- Perimysium is encountered in skeletal muscle anatomy, histology, pathology and studies of muscle mechanics.
- Its organization is examined to understand fascicle boundaries, connective tissue changes and the pathways of larger intramuscular vessels and nerves.
Sources Filled
- Wikidata item Q3543470: perimysium - identity and sense of the item
- Wikipedia: Perimysium - general description of the item
Open questions
- Which species and muscle-specific conventions reliably distinguish fascicles and perimysial subdivisions in this registry's intended coverage?
- What reference distributions for perimysial thickness and area fraction are defensible across muscle regions, ages, and preparation methods?
- Under which loading conditions does perimysium primarily accommodate interfascicular shear, and when can its contribution to force transmission be isolated experimentally?
- Which localized composition and architecture measurements best explain mechanical differences without relying on bulk muscle collagen measurements?
- What evidence is sufficient to distinguish pathological perimysial fibrosis from adaptive remodeling, normal regional variation, and preparation artifacts?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q3543470/spec.json