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Phys Topicsgeneral-medicine

Phys · general-medicine

Neurological Examination of the Lower Limbs — The DCE Short-Case Routine

Also known as lower limb neurological examination · lower limb neurological exam · neurological examination lower limbs · examine this patient lower limbs neurologically · DCE short case lower limb neurology · PACES neurological station lower limb · motor examination lower limb · heel-shin test · Romberg test · Babinski sign · plantar response · ankle clonus · MRC power grading · myotome examination lower limb · dermatome examination lower limb · tone power reflexes coordination sensory gait · UMN versus LMN · pes cavus · high-stepping gait · foot drop

Consultant-physician-depth guide to the systematic neurological examination of the lower limbs for the FRACP DCE short case and the MRCP PACES neurological station. Covers the eight-step routine — inspection including gait and stance, tone with ankle clonus, power by myotome, reflexes by root level, the plantar response, coordination with the heel-shin test, the spinothalamic and dorsal column sensory pathways, and the gait assessment — the interpretation of each sign, the UMN versus LMN framework, the presentation template the candidate delivers aloud, and the examiner discussion questions by finding. Addresses gait patterns (hemiplegic, parkinsonian, ataxic, high-stepping, waddling), the Romberg test, muscle wasting patterns, foot deformity (pes cavus in Friedreich ataxia and Charcot-Marie-Tooth), tone abnormalities (spasticity with clonus, lead-pipe rigidity), the MRC power grading with myotomes from L2 to S2, reflex levels (knee jerk L3/4, ankle jerk S1/2), the absent ankle jerk with preserved knee jerk of diabetic neuropathy and the delayed relaxation of hypothyroidism, the Babinski sign, the heel-shin test for cerebellar function, stocking-distribution sensory loss, and the common examination traps. Structured for FRACP DCE and MRCP PACES preparation.

high7 referencesUpdated 26 July 20269 min readVerification in progress

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Red flags

  • Acute onset of unilateral lower limb weakness with UMN signs (spastic tone, hyperreflexia, upgoing plantar, pyramidal-pattern weakness) may represent an acute stroke or spinal cord lesion — this is a neurological emergency requiring immediate imaging and time-critical management
  • Acute bilateral lower limb weakness with a sensory level and sphincter disturbance suggests an acute spinal cord lesion (compression, infarction, transverse myelitis) — cord compression is a surgical emergency requiring urgent MRI and neurosurgical review
  • Asymmetric weakness with progressively wasted, fasciculating muscles and brisk reflexes across multiple body regions is motor neuron disease until proven otherwise — the combination of a wasted, fasciculating limb with a brisk reflex is pathognomonic
  • A positive Romberg sign with loss of vibration and joint position sense in the lower limbs is a dorsal column lesion — subacute combined degeneration from vitamin B12 deficiency is reversible if treated early and devastating if missed
  • Acute ascending symmetric weakness with areflexia progressing over hours to days is Guillain-Barre syndrome until proven otherwise — monitor the forced vital capacity and the bulbar and respiratory function, because respiratory failure is the killer
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FRACP DCEMRCP PACESMRCP Part 1MRCP Part 2ABIM Internal Medicine

Red flags

  • Acute onset of unilateral lower limb weakness with UMN signs (spastic tone, hyperreflexia, upgoing plantar, pyramidal-pattern weakness) may represent an acute stroke or spinal cord lesion — this is a neurological emergency requiring immediate imaging and time-critical management
  • Acute bilateral lower limb weakness with a sensory level and sphincter disturbance suggests an acute spinal cord lesion (compression, infarction, transverse myelitis) — cord compression is a surgical emergency requiring urgent MRI and neurosurgical review
  • Asymmetric weakness with progressively wasted, fasciculating muscles and brisk reflexes across multiple body regions is motor neuron disease until proven otherwise — the combination of a wasted, fasciculating limb with a brisk reflex is pathognomonic
  • A positive Romberg sign with loss of vibration and joint position sense in the lower limbs is a dorsal column lesion — subacute combined degeneration from vitamin B12 deficiency is reversible if treated early and devastating if missed
  • Acute ascending symmetric weakness with areflexia progressing over hours to days is Guillain-Barre syndrome until proven otherwise — monitor the forced vital capacity and the bulbar and respiratory function, because respiratory failure is the killer

Neurological Examination of the Lower Limbs — The DCE Short-Case Routine

The one-line answer

The lower-limb short case rewards the candidate who watches the gait first and works to a UMN-versus-LMN synthesis. The routine is eight steps, in the same order every time: gait and inspection, tone, power, reflexes, plantar response, coordination, sensory, functional. The gait alone can name the lesion before a single reflex is struck — hemiplegic, parkinsonian, ataxic, high-stepping or waddling.[1]

Meet the patient

The instruction is "Please examine this patient's lower limbs neurologically." The single highest-yield observation is the gait — the candidate who watches the patient walk to the couch has often generated the differential before a single reflex is struck.[1]

A hemiplegic gait shouts cortical UMN lesion; a shuffling, festinating gait shouts Parkinson disease; a wide-based ataxic gait shouts cerebellum or dorsal column; a high-stepping foot-drop gait shouts a common peroneal nerve or L5 root lesion. Surrender that observation and you have lost the station.[1]

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References7ShowHide
  1. [1]Brooks BR, Miller RG, Swash M, Munsat TL; World Federation of Neurology Research Group on Motor Neuron Diseases El Escorial revisited: revised criteria for the diagnosis of amyotrophic lateral sclerosis Amyotroph Lateral Scler Other Motor Neuron Disord, 2000.PMID 11464847
  2. [2]Hannaford A, Pavey N, van den Bos M, Geevasinga N, Menon P, Shefner JM, Kiernan MC, Vucic S Diagnostic Utility of Gold Coast Criteria in Amyotrophic Lateral Sclerosis Ann Neurol, 2021.PMID 33565111
  3. [3]Cook CE, Wilhelm M, Cook AE, et al. Clinical tests for screening and diagnosis of cervical spine myelopathy: a systematic review J Manipulative Physiol Ther, 2011.PMID 21899892
  4. [4]Postuma RB, Berg D, Stern M, Poewe W, Olanow CW, Oertel W, Obeso J, Marek K, Litvan I, Lang AE, Halliday G, Goetz CG, Gasser T, Dubois B, Chan P, Bloem BR, Adler CH, Deuschl G MDS clinical diagnostic criteria for Parkinson's disease Mov Disord, 2015.PMID 26474316
  5. [5]Bidichandani SI, Delatycki MB, Napierala M, Duquette A Friedreich Ataxia 1993.PMID 20301458
  6. [6]Delatycki MB, Corben LA Clinical features of Friedreich ataxia J Child Neurol, 2012.PMID 22752493
  7. [7]Pareyson D, Marchesi C Diagnosis, natural history, and management of Charcot-Marie-Tooth disease Lancet Neurol, 2009.PMID 19539237

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