MRCP PACES Approach to Weakness
Approach to Weakness
  • UMN: spasticity, hyperreflexia, clonus, positive Babinski. No fasciculations, mild wasting
  • LMN: flaccid, hyporeflexic / arreflexic, absent Babinski. Severe wasting with fasciculations

Upper limb motor innervation

Upper Limb Myotomes

Lower limb motor innervation

Lower Limb Myotomes

Reflexes

  • Biceps: C5,6
  • Supinator: C6,7
  • Triceps: C7,8
  • Knee: L3,4
  • Ankle: S1,2
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