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Hypoglossal nerve palsy

Last edited: 4/15/2026

Overview

Hypoglossal nerve palsy involves dysfunction of the twelfth cranial nerve, leading to unilateral atrophy or deviation of the tongue, often without associated neurological deficits beyond the hypoglossal territory 1.

Diagnosis

  • Clinical Presentation: Atrophy or deviation of the tongue towards the affected side, absence of other neurological signs 1.
  • Recommended Tests: Electromyography (EMG) and nerve conduction studies may help confirm isolated involvement 1.
  • Grading: No standardized grading system specifically mentioned; clinical severity often assessed qualitatively 1.

    • Management

  • First-Line Treatments: Address underlying causes (e.g., chronic tonsillitis) 1.
  • Adjunctive Treatments: Physical therapy focusing on tongue exercises to maintain function 1.
  • Specific Drug Classes/Doses: Not specified in the provided abstracts 1.

    • Special Populations

  • Pediatrics: Case reported in a 5-year-old with chronic tonsillitis, suggesting potential association with infectious processes 1.
  • Comorbidities: Chronic tonsillitis noted as a potential underlying condition 1.

    • Key Recommendations

  • Evaluate and treat underlying causes such as chronic tonsillitis in pediatric patients presenting with isolated hypoglossal nerve palsy (Evidence: Moderate 1).
  • Consider EMG and nerve conduction studies to confirm isolated hypoglossal nerve involvement (Evidence: Weak 1).
  • Implement physical therapy focusing on tongue exercises to mitigate functional decline (Evidence: Expert opinion 1).

    • References

    1 Chamdawalla S, Lubec G. Isolated hypoglossal paralysis. Padiatrie und Padologie 1985. link

    Original source

    1. [1]
      Isolated hypoglossal paralysis. — Chamdawalla S, Lubec G Padiatrie und Padologie (1985)
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