free nerve ending

Terminal continuity

Record evidence for a terminal branch and sensory identity separately from simple nerve-label positivity.

1. What establishes that this profile terminates here rather than continuing outside the section or image? boundary
2. What tracing, anatomical or functional evidence identifies it as sensory rather than motor or autonomic? provenance

Encapsulation and specialization

Document the observed terminal organization and the resolution needed to exclude competing receptor identities.

1. Does the available reconstruction demonstrate absence of an enclosing sensory corpuscle? definition
2. Is the terminal organized into a specialized receptor-cell complex that requires a neighboring model? boundary

Compartment localization

Record site and depth without treating every free ending as a cutaneous structure.

1. Which host, organ, anatomical site and tissue layer contain the observed terminal? provenance
2. What landmarks establish its depth and position relative to tissue boundaries? measurement

Terminal-neighbor relations

Distinguish verified membrane relationships from apparent proximity in a projection.

1. Which epithelial, glial, stromal or other cells are adjacent to the terminal? measurement
2. Does the evidence show contact, intervening material or only unresolved proximity? boundary

Arbor extent

Record branches, tips and truncation before comparing terminal architecture.

1. Is the observation one tip, a complete arbor, a fragment or several overlapping endings? definition
2. What branch lengths, branch-point counts and spatial extent are measurable, and where is the reconstruction truncated? measurement

Axon link and classification

Keep continuity, myelination and physiological fiber classification as separate evidence-bearing statements.

1. How was continuity between this ending and the identified parent axon established? provenance
2. Where were myelination or conduction properties assessed, and do those measurements justify a parent-fiber classification? measurement

Tested response profile

Distinguish measured responsiveness from modality labels inferred from location or markers.

1. Which mechanical, thermal or chemical stimuli were delivered at the terminal, at what magnitude and duration? measurement
2. What evidence supports a functional label such as nociceptive, and which relevant stimuli remain untested? boundary

Threshold and dynamics

Record response criteria, latency and behavior during sustained or repeated stimulation.

1. What response criterion defines threshold, and what latency or adaptation is observed under the stated protocol? measurement
2. How does the recording isolate this terminal or its supplying unit from neighboring afferents? provenance

Damage and remodeling evidence

Separate supported biological change from sectioning, incomplete labeling or different sampled regions.

1. What observations support intactness, degeneration or regeneration of this terminal? measurement
2. What controls distinguish true terminal loss or branching change from preparation and detection effects? provenance

Responsiveness shift

Track threshold or response changes relative to an explicit baseline.

1. Relative to which baseline did threshold, spontaneous activity or evoked response change? measurement
2. What evidence separates a local terminal change from altered conduction, recording stability or stimulus delivery? boundary

Detection and counting

Specify detection limits and distinguish counts of fibers, crossings, tips and reconstructed endings.

1. What labeling specificity and spatial resolution support identification of this free ending? provenance
2. If abundance is reported, what exactly is counted and what length, area or volume supplies the denominator? measurement

Next resolving action

Connect each proposed observation or perturbation to a terminal-specific uncertainty and an interpretation rule.

1. Would serial imaging, axon tracing or controlled stimulation best resolve the current uncertainty? action
2. Which controls and stopping criteria would make an authorized perturbation interpretable while preserving the preparation's required viability? action

Check these first

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these check these first hold for the sense of free nerve ending this model covers, and on what evidence? provenance

Kinds and varieties

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these kinds and varieties hold for the sense of free nerve ending this model covers, and on what evidence? provenance

Real-world use

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these real-world use hold for the sense of free nerve ending this model covers, and on what evidence? provenance

Typical measurements

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these typical measurements hold for the sense of free nerve ending 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.

1. Which of these failure modes and hazards hold for the sense of free nerve ending this model covers, and on what evidence? provenance

Regional variation

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these regional variation hold for the sense of free nerve ending 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.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of free nerve ending this model covers, and on what evidence? provenance