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1 · SNAPSHOT

Progressive Neuropathy / Compression Syndrome body chart — Illustrative, not diagnostic. Canva body chart for Progressive Neuropathy / Compression Syndrome.

Progressive neurological deficit is a change in function requiring assessment, not a single diagnosis. It may involve one peripheral nerve, a root, plexus, spinal cord, brain or systemic neuromuscular disease.

Document onset, speed of change, distribution and objective loss. A focal entrapment can cause weakness or wasting; a single nerve territory does not guarantee conservative care is appropriate. Bilateral or night symptoms alone do not establish central disease.

Sudden focal weakness, respiratory difficulty or new sphincter/saddle symptoms with spinal concern needs emergency assessment. Rapidly progressive symmetrical weakness needs immediate neurological assessment. Other progression requires referral urgency matched to the history and findings.

See section 6 for the action table and NICE NG127. This international guidance must be applied through local Australian pathways.

2 · SE — THE SUBJECTIVE PATTERN (the 70%)

Five stages, in your course's order — with HISTORY doing the heavy lifting, because the discriminator here is the trajectory, not the symptom.

MAIN PROBLEM

"My hand's getting weaker. I keep dropping things."
"It's gone numb and it doesn't come back now."
"I've noticed my thumb muscle looks flatter than the other one."
"I'm catching my toe on the ground."

BODY CHART

Map the territory precisely, both limbs. This is the single most useful thing on the chart, because the question is whether it fits one named nerve.
Mark motor symptoms separately from sensory ones. A motor-dominant picture reads differently.
Note proximal as well as distal involvement.
Bilateral distribution gets drawn even if only one side is complained about. You will only find the second side if you look.

BEHAVIOUR

Does it vary with posture and load? A focal entrapment usually does.
Does it persist at rest and at night? That is a shift.
Is there gait imbalance, clumsiness, or dropping objects? These broaden localisation; they may also occur in a peripheral nerve problem.

HISTORY

The trajectory is the diagnosis-shaping question.

Getting worse, staying the same, or fluctuating? Worsening over weeks to months, rather than varying with one exposure, is the shift.
Recurrent palsies after minor compression — a leg that goes off after sitting cross-legged, a wrist drop after a night's sleep. Ask about it; it can be hereditary (van Paassen et al. 2014).
Trauma, including old trauma. Timing matters, because reinnervation timing affects outcomes (Bateman et al. 2025).
Any label already applied — and by whom, on what basis, and has it responded?

SPECIAL / SCREENING QUESTIONS

The systemic screen for polyneuropathy (Sommer et al. 2018; Mirian et al. 2023; Misra et al. 2008):

Diabetes. Alcohol. Chemotherapy or other neurotoxic medication. Thyroid disease. B12. Autoimmune or inflammatory disease. Family history of neuropathy or foot deformity. Recent infection. Known or suspected malignancy.
Bladder, bowel, saddle change · gait imbalance · hand clumsiness — the cauda equina and myelopathy screens run alongside this one, every time.

3 · HYPOTHESIS RANKING

Use the distribution to guide localisation, while onset and progression determine urgency.

Possible level	Supporting pattern	Limitation
Peripheral nerve	Deficit compatible with a named nerve	Entrapment can cause motor loss and wasting; focal does not mean safe
Nerve root	Myotomal, reflex and sensory findings compatible with a root	Patterns overlap and neck/back pain may be absent
Plexus	Findings across named nerves in one limb	Requires clinical and often specialist localisation
Polyneuropathy	Often distal and symmetrical	Symmetry is not diagnostic; systemic causes need assessment
Cord/brain	Upper motor neuron findings, gait or other central features	Individual normal signs do not exclude disease
Neuromuscular disease	Progressive weakness with or without wasting/fasciculations	Neuropathy, myopathy and motor neuron disorders remain possibilities

Do not wait for multi-nerve involvement or atrophy before escalating a progressive deficit. Examination, history and investigations contribute different information; no single bedside LR is assigned to this broad presentation.

4 · RED FLAGS — DON'T MISS THIS

This section is free, on every pattern, forever. Safety is never gated.

The escalation set

Finding	What it suggests	What you do
Progressive weakness	Anything on the ladder below focal	Urgent medical / neurology referral
Wasting or fasciculations with weakness	Lower motor neuron syndrome	Urgent neurology referral
Weakness with no sensory symptoms, speech or swallow change, tongue fasciculations — or no improvement after a decompression	Motor neuron disease mimicking carpal or cubital tunnel (Thomson et al. 2023) [21]	Neurodiagnostic testing and prompt neurology referral
Bilateral or multi-territory symptoms	Peripheral, central or systemic causes	Assess onset/progression and arrange medical triage
Weakness beyond one peripheral nerve territory	Not a local entrapment	Medical referral
Absent reflexes	Polyneuropathy or root involvement	Medical referral
New gait imbalance or hand clumsiness	Myelopathy or central cause	🚑 Urgent; emergency if acute or rapidly progressive
Upper-limb symptoms with pathological reflexes — even with a normal gait	Cervical myelopathy; no gait change and an incomplete neuro exam are where the diagnosis gets delayed (Foulds et al. 2025) [22]	🚑 Urgent — say myelopathy in the letter, so it isn't sent to nerve conduction studies first
Bladder, bowel or saddle change	Cauda equina or cord	🚑 Emergency, now
Rapidly worsening sensorimotor loss	Any cause — the rate is the flag	🚑 Emergency, now — immediate neurological assessment

The three rules that survive everything else

1. Progressive is not a severity grade. It is a different question. A worsening deficit is a localisation problem, not a loading problem.

2. Bilateral or multi-territory findings broaden localisation. Separate peripheral problems, central and systemic causes remain possible.

Finding	Action
Sudden focal weakness, including a hand or limb	Emergency/stroke assessment now
Weakness with breathing difficulty at rest or when lying flat	Emergency help now
Rapidly progressive symmetrical weakness	Immediate neurological assessment, including respiratory and bulbar function
New bladder/bowel/saddle change with spinal concern	Emergency assessment for possible cauda equina/cord pathology
Progressive weakness with swallowing impairment	Urgent medical/neurological assessment; respiratory difficulty escalates immediately
Other progressive motor loss, wasting or new gait/central signs	Arrange medical assessment with urgency matched to onset and progression

Do not delay referral to finish a provocative test battery or a trial of exercise. Document dated strength, sensation, reflexes and functional change without delaying an emergency response. Protect the limb and address falls/skin risks while assessment is arranged.

NICE NG127 adult referral guidance. Paediatric presentations need age-appropriate pathways.

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Twelve slides on this pattern: what you'll hear, what to examine, what to do. Free with an account.

Guideline anchor

No Australian guideline covers when a physiotherapist should escalate a progressive neurological deficit.

Anchored to the international electrodiagnostic testing guideline review for entrapment neuropathies (Pugdahl et al. 2020, PMID 33151661) for the investigation pathway, and to the polyneuropathy guideline-informed review (Sommer et al. 2018, PMID 29478436) for the systemic differential. Both non-Australian.

PubMed Source

Both anchors are written for neurologists and clinical neurophysiologists deciding on investigation, not for a physiotherapist deciding whether to keep treating. The escalation logic on this page is drawn from the primary evidence and from the profession's own referral literature, and is labelled as such.

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Verified diagnostic accuracy, where the evidence stands and what it doesn't settle. Free with an account.

Sources · 21

Show

Every source on this page resolves and title-verifies against PubMed. Newest first.

2008Misra et al. (2008). Diagnostic approach to peripheral neuropathy. Annals of Indian Academy of Neurology, 11(2), 89-97. https://doi.org/10.4103/0972-2327.41875
2013Joyce & Carter (2013). Electrodiagnosis in persons with amyotrophic lateral sclerosis. PM & R : the journal of injury, function, and rehabilitation, 5(5 Suppl), S89-95. https://doi.org/10.1016/j.pmrj.2013.03.020
2014Chung et al. (2014). Peripheral neuropathy: clinical and electrophysiological considerations. Neuroimaging clinics of North America, 24(1), 49-65. https://doi.org/10.1016/j.nic.2013.03.023
2014van Paassen et al. (2014). PMP22 related neuropathies: Charcot-Marie-Tooth disease type 1A and Hereditary Neuropathy with liability to Pressure Palsies. Orphanet journal of rare diseases, 9, 38. https://doi.org/10.1186/1750-1172-9-38
2015Santosa et al. (2015). Complications of compressive neuropathy: prevention and management strategies. Hand clinics, 31(2), 139-49. https://doi.org/10.1016/j.hcl.2015.01.012
2017Garg et al. (2017). Differentiating lower motor neuron syndromes. Journal of neurology, neurosurgery, and psychiatry, 88(6), 474-483. https://doi.org/10.1136/jnnp-2016-313526
2018Sommer et al. (2018). Polyneuropathies. Deutsches Arzteblatt international, 115(6), 83-90. https://doi.org/10.3238/arztebl.2018.083
2019Doughty & Bowley (2019). Entrapment Neuropathies of the Upper Extremity. The Medical clinics of North America, 103(2), 357-370. https://doi.org/10.1016/j.mcna.2018.10.012
2019Bowley & Doughty (2019). Entrapment Neuropathies of the Lower Extremity. The Medical clinics of North America, 103(2), 371-382. https://doi.org/10.1016/j.mcna.2018.10.013
2020Gilchrist & Dandapat (2020). Neuromuscular Mimics of Entrapment Neuropathies of Upper Extremities. Hand (New York, N.Y.), 15(5), 599-607. https://doi.org/10.1177/1558944719898801
2020Allen (2020). The Misdiagnosis of CIDP: A Review. Neurology and therapy, 9(1), 43-54. https://doi.org/10.1007/s40120-020-00184-6
2020Pugdahl et al. (2020). Electrodiagnostic Testing of Entrapment Neuropathies: A Review of Existing Guidelines. Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society, 37(4), 299-305. https://doi.org/10.1097/WNP.0000000000000668
2021Hannaford et al. (2021). Review Article "Spotlight on Ultrasonography in the Diagnosis of Peripheral Nerve Disease: The Evidence to Date". International journal of general medicine, 14, 4579-4604. https://doi.org/10.2147/IJGM.S295851
2022Davis & Day (2022). Peripheral nerve entrapment: how to diagnose and when to refer. The Medical journal of Australia, 216(3), 126-130. https://doi.org/10.5694/mja2.51400
2023Mirian et al. (2023). Diagnosis and management of patients with polyneuropathy. CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne, 195(6), E227-E233. https://doi.org/10.1503/cmaj.220936
2023Schwabl et al. (2023). Nerve entrapment syndromes: detection by ultrasound. Ultrasonography (Seoul, Korea), 42(3), 376-387. https://doi.org/10.14366/usg.22186
2023Graesser et al. (2023). Future Considerations in the Diagnosis and Treatment of Compressive Neuropathies of the Upper Extremity. Journal of hand surgery global online, 5(4), 536-546. https://doi.org/10.1016/j.jhsg.2022.10.009
2023McGurk et al. (2023). Diagnostic Considerations in Compressive Neuropathies. Journal of hand surgery global online, 5(4), 525-535. https://doi.org/10.1016/j.jhsg.2022.10.010
2023Drăghici et al. (2023). Diagnostic Approach to Lower Limb Entrapment Neuropathies: A Narrative Literature Review. Diagnostics (Basel, Switzerland), 13(21). https://doi.org/10.3390/diagnostics13213385
2025Bateman et al. (2025). Assessment, management, and rehabilitation of traumatic peripheral nerve injuries for non-surgeons. Muscle & nerve, 71(5), 696-714. https://doi.org/10.1002/mus.28185
2025Foulds et al. (2025). Presenting Symptoms Define Time to Diagnosis in Degenerative Cervical Myelopathy: Process Mapping From a Musculoskeletal Triage Unit in the UK. Musculoskeletal care, 23(1), e70044. https://doi.org/10.1002/msc.70044

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