{"paper":{"title":"From Organization to Viability: A Multi-Level Analysis of Gait Dynamics Under Occlusal Constraint","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Comparable gait performance across occlusal conditions masks distinct longitudinal changes in latent-space organization.","cross_cats":["q-bio.NC"],"primary_cat":"q-bio.OT","authors_text":"Elsa Raynal, Jacques Margerit, Jacques Raynal, Pierre Slangen","submitted_at":"2026-05-12T10:15:18Z","abstract_excerpt":"Clinical interpretation often assumes that observable performance provides sufficient information about the organization of an adaptive system. However, similar observable performance may correspond to distinct latent organizations. This study extends a previous multi-level framework by introducing a fourth analytical level centered on longitudinal viability. Using an exploratory single-case design in a Parkinsonian patient, gait data were recorded with instrumented insoles under three occlusal conditions: neutral natural occlusion (ONL), a 2.5-degree increase in vertical dimension of occlusio"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Although observable performance remained globally comparable across conditions, PCA-based latent-space analysis revealed differentiated longitudinal centroid displacements. OC3 exhibited the smallest displacement, ONL an intermediate displacement, and OC2.5 the largest displacement. This hierarchy supports the relevance of a Level 4 framework centered on viability.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That PCA centroid displacement over 11 weeks is a valid proxy for 'viability' (capacity to maintain organization) rather than an artifact of the single-case design, the intervening sensorimotor training, or the specific choice of three occlusion levels; the paper itself flags the findings as within-subject, exploratory, and non-causal.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"In one Parkinson patient, higher occlusion produced the smallest longitudinal shift in PCA gait latent space over 11 weeks while immediate performance stayed comparable, supporting a viability level focused on sustained organization.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Comparable gait performance across occlusal conditions masks distinct longitudinal changes in latent-space organization.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"8e5c8a5b065915dd6bc43dc1b7daba9f63dc09f4d1560791e5341789fb011608"},"source":{"id":"2605.13893","kind":"arxiv","version":1},"verdict":{"id":"f4be177e-51ef-486a-8d9d-983201da710b","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T06:12:19.004895Z","strongest_claim":"Although observable performance remained globally comparable across conditions, PCA-based latent-space analysis revealed differentiated longitudinal centroid displacements. OC3 exhibited the smallest displacement, ONL an intermediate displacement, and OC2.5 the largest displacement. This hierarchy supports the relevance of a Level 4 framework centered on viability.","one_line_summary":"In one Parkinson patient, higher occlusion produced the smallest longitudinal shift in PCA gait latent space over 11 weeks while immediate performance stayed comparable, supporting a viability level focused on sustained organization.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That PCA centroid displacement over 11 weeks is a valid proxy for 'viability' (capacity to maintain organization) rather than an artifact of the single-case design, the intervening sensorimotor training, or the specific choice of three occlusion levels; the paper itself flags the findings as within-subject, exploratory, and non-causal.","pith_extraction_headline":"Comparable gait performance across occlusal conditions masks distinct longitudinal changes in latent-space organization."},"references":{"count":28,"sample":[{"doi":"10.48550/arxiv.2605.00778","year":2026,"title":"Observable Performance Does Not Fully Reflect System Organization: A Multi-Level Analysis of Gait Dynamics Under Occlusal Constraint","work_id":"7f5f48e9-9ded-4617-b046-335312d928e1","ref_index":1,"cited_arxiv_id":"2605.00778","is_internal_anchor":true},{"doi":"10.1016/0966-6362(96)82849-9","year":1995,"title":"Human balance and posture control during standing and walking","work_id":"0bbd836b-3715-4355-a59f-eccb307f2ba0","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1093/ageing/afl077","year":2006,"title":"Postural orientation and equilibrium","work_id":"aac1a53f-629c-4b76-b3ed-d9feb4cc91bd","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1186/s12984-016-0154-5","year":2016,"title":"Free-living gait characteristics in ageing and Parkinson’s disease: impact of environment and ambulatory bout length","work_id":"afbd377b-337d-4cdd-b7d3-6a78daa00c7b","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1063/1.3147408","year":2009,"title":"Gait dynamics in Parkinson’s disease: common and distinct behavior among stride length, gait variability, and fractal-like scaling","work_id":"7d8bf9f5-04d4-4e89-8ff3-9e2c5f51a850","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":28,"snapshot_sha256":"0da845a640133a683ee554e2725586e46e56b01e711f4dc366d037de14b5601c","internal_anchors":1},"formal_canon":{"evidence_count":1,"snapshot_sha256":"f851841e82e37a1132d1c84eb0e3e8d9a23157b97fe3ff8a2baf834c0b99637b"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}