A scientific discipline
Dynervology names and characterises dynamic nerve compressions — a neurological component often absent from standard mechanical readings. A structured clinical discipline, open to the medical community, operated at the Institute of Tours Métropole.
The finding
Repetitive movements, constrained postures, load handling: the mechanical reading of MSDs remains essential. But a share of these disorders persists without a sufficient mechanical cause — and that is where a dynamic nerve compression is often at play.
In clinical consultation, certain complaints escape the standard orthopaedic reading. Pain arises on exertion then subsides at rest. It shifts territory depending on posture. It is not fully explained by the available tendon or joint imaging.
Dynervology sets a framework: these presentations frequently involve a dynamic nerve compression — a peripheral nerve subjected to an intermittent constraint during movement, within a precise anatomical canal. Screening for this component does not replace the mechanical diagnosis, it complements it.
The stake is clinical above all. Without naming the compression, clinical guidance stays partial, and the public-sector agent or employee may go through several rounds of care without any of them removing the principal factor.
The foundation
The credibility of an emerging discipline rests first on the rigour of its method, before its results.
The Dynervolink clinical protocol was defined by Dr Benjamin Ferembach, orthopaedic surgeon specialising in dynamic nerve compressions. It is structured to be applied consistently in the field, independently of the practitioners involved: a clear, validated and reproducible methodology.
The approach formalises an expert clinical reasoning: structured collection of functional symptoms and context, identification of suggestive patterns, ranking of hypotheses. It is annotated by several practitioners to avoid any dependence on an individual line of reasoning and to prepare a multi-centre generalisation. In time, this formalisation feeds the ambition of a digital twin of the dynervologist, a guidance-support tool targeted for 2030.
This method does not produce a diagnosis, does not replace the clinical examination and is no substitute for medical decision-making. It is a tool to help structure reasoning, intended to reduce clinical wandering and improve guidance.
Evidence & results
A reproducible protocol, a first instrumented series measuring recovery, and concordant feedback from surgeons, a neurologist, a physiotherapist and patients: the early signals converge.
What if some of your MSD sick leave resisted treatment because its cause was never named? The clinical starting point
At the Institute, a first instrumented series measured, by sensors, the dorsiflexion strength after release of the fibular nerve. In most patients, strength improves from the first month after care, with no signal of functional deterioration.
What this series establishes: the dynamic nerve compression is an objectifiable clinical reality, and its management produces a measurable functional benefit, which grounds the value of early screening.
Strength recovered
as early as month 1
In most patients of a first instrumented series, strength is measured by sensors as improving from the first month after care.
Institute of Dynervology, 2026
Orthopaedic surgeon
“ Imaging may not be contributory, electrodiagnostics may be normal while the functional complaint exists. The dynervological approach reintroduces the dynamic dimension of movement and guides toward effective care. ”
Surgeon — Karolinska Institutet · Aspetar
“ Electrophysiological assessment objectifies an impairment only in a limited proportion of situations, particularly when the compression is intermittent. Only a fine clinical analysis identifies the mechanism at play. ”
Neurologist
“ Electrodiagnostics have known limitations in intermittent or movement-dependent impairments. A structured clinical approach is essential to complete the diagnostic arsenal. ”
Orthopaedic surgeon Dr Thomas Apard and physiotherapist Jérôme Piquet make the same observation: faced with the dissociation between functional complaints, electrophysiology and imaging, dynamic clinical analysis reconstructs a coherent aetiological logic where segmented approaches fail, and a compression correctly identified and treated often yields a rapid, measurable recovery of strength.
The economic stake
The cost of an MSD is largely underestimated when limited to the insurance cost. It explodes in case of chronicity, and that is precisely where early screening has value.
≈ 34 000 €/case
Average imputed cost of a recognised upper-limb MSD (40 976 cases, €1.408 bn of imputed expenses in 2024).
Assurance Maladie – Risques professionnels, Rapport annuel 2024
60 – 120 k€/case
Total estimated cost to the company, indirect costs included. A prudent order of magnitude, not a model of our own.
Economic and insurance literature — indirect costs 2 to 4× direct costs
up to 98 %
Share of MSDs among occupational diseases in the public sector; leave durations often exceeding 4 months, cost often self-insured.
CNRACL – Fonds national de prévention
Avoiding a single long leave or relapse is most often enough to make a structured screening and guidance programme pay for itself. As a sector benchmark, and not as a result specific to Dynervolink, structured MSD prevention programmes document a return on the order of €2.2 to €3 for every €1 invested.
Going further
If you represent an exposed organisation, a medical staff, or wish to go deeper scientifically, the Institute team responds to qualified requests.
