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Lower Limb Neuro

Lower Limb Radiculopathy

February 15th, 2021


  • Manifestations of Radiculopathy

  • Lower motor neuron weakness affecting a myotomal distribution
  • Sensory loss affecting a dermatomal distribution
  • Causes of Radiculopathy

  • Intervertebral disc herniation
  • Osteoarthritis (osteophytosis)
  • Diabetes
  • Haematoma - epidural / subdural
  • Malignancy - spine, spinal cord
  • Infection - epidural abscess, tuberculosis, Lyme disease, syphilis, herpes zoster
  • Lumbosacral Nerve Roots

  • RootDermatomeMyotomeReflex
    L1Inguinal region  
    L2Anterior mid-thighHip flexion 
    L3Anterior kneeKnee extensionPatellar
    L4Medial lower legHip extension & abduction
    Ankle dorsiflexion
    L5Lateral lower leg
    Dorsum of the foot
    Toe extension
    Inversion & eversion
    S1Lateral foot
    Posterior lower leg
    Plantar flexionAnkle
    S2Posterior thighKnee flexion
    Toe flexion

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