thumb

First-digit identification

Records the evidence that this structure is the hand's thumb and identifies its side.

1. Which hand and side does this thumb belong to, and what establishes its first-digit identity? definition
2. Does atypical anatomy or reconstruction make the boundary between thumb, another digit and replacement uncertain? boundary

Present segments and joints

Records actual anatomy and separates observed structures from presumed typical anatomy.

1. Which thumb segments and joints are present, absent, fused, duplicated or reconstructed? definition
2. Which observations or records establish whether this configuration is congenital, acquired or reconstructed? provenance

Available movement

Records movement by joint, direction and assessment conditions.

1. What active or professionally assessed passive movement is recorded at each present thumb joint? measurement
2. Which posture, method, symptoms or compensating hand movements affected the measurement? provenance

Reachable contact targets

Distinguishes touching a target from achieving the contact orientation needed for use.

1. Which finger or palm targets can the thumb reach, and which thumb surface makes contact? measurement
2. Does the required contact depend on assistance or compensating movement elsewhere in the hand? boundary

Regional sensory response

Records sensory evidence without inferring a nerve diagnosis from symptoms alone.

1. What sensory responses or reported alterations are recorded at the pad, tip and other specified thumb regions? measurement
2. Were these responses self-reported or assessed using a named method, and when? provenance

Task-specific contact control

Captures force, slip, release and symptom response for a specified contact pattern.

1. For the specified pinch or grasp, what force, contact stability and controlled release were demonstrated? measurement
2. Which opposing digits, object properties and hand posture contributed to that result? boundary

Local tissue state

Captures visible or assessed abnormalities while keeping interpretation separate from observation.

1. Where are skin breaks, swelling, nail changes, colour changes or other tissue observations located? measurement
2. Which observations have been directly assessed, and which remain reports or uncertain image interpretations? provenance

Change from thumb baseline

Records onset, persistence and departure from the person's previous thumb state.

1. What changed in thumb pain, sensation, movement or usable contact, and over what interval? measurement
2. What activity or event preceded the change, and is that association reported or independently documented? provenance

Thumb task compatibility

Records whether a particular interaction is achievable and what adaptation it needs.

1. What thumb position, contact surface, force and repetition does the proposed task require? measurement
2. Which demonstrated adaptation makes the task achievable within recorded tolerance and restrictions? action

Supported use boundaries

Separates demonstrated capability from permission to increase demands or alter protective arrangements.

1. What current restrictions or protective measures apply specifically to this thumb, and who established them? provenance
2. What missing assessment or unresolved change prevents a justified decision about the proposed thumb use? action

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

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

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these identifiers and schemes hold for the sense of thumb this model covers, and on what evidence? provenance

Standards and regulation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these standards and regulation hold for the sense of thumb this model covers, and on what evidence? provenance

Real-world use

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

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

Typical measurements

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these typical measurements hold for the sense of thumb this model covers, and on what evidence? provenance

Failure modes and hazards

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

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

Regional variation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these regional variation hold for the sense of thumb this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

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