Overview
Marcus Gunn phenomenon (MGP), also known as jaw-winking or pterygoid-levator synkinesis, is a congenital condition characterized by synchronous elevation of the eyelid with mouth opening due to aberrant innervation of the levator palpebrae superioris muscle by a branch of the trigeminal nerve instead of the oculomotor nerve 1.Diagnosis
Clinical Presentation: Synchronous eyelid elevation with jaw movement 1.
Diagnostic Tests: Detailed neurological examination focusing on cranial nerves, particularly trigeminal and oculomotor nerves 1.
Interdisciplinary Approach: Consider laryngological evaluation and assessment for olfactory disturbances to guide comprehensive diagnostics 1.Management
Conservative Management: Often no specific treatment is required; management focuses on addressing associated symptoms and functional impacts 1.
Interdisciplinary Care: Collaboration with ENT specialists for comprehensive evaluation and management, especially in cases with olfactory dysfunction 1.Special Populations
Pediatrics: Early diagnosis and interdisciplinary diagnostics are crucial due to potential associated olfactory disturbances 1.Key Recommendations
Conduct a thorough interdisciplinary evaluation including ENT specialists for children presenting with MGP to assess for olfactory disturbances 1 (Evidence: Moderate).
Focus on detailed neurological assessment of cranial nerves, particularly trigeminal and oculomotor nerves, in diagnosing MGP 1 (Evidence: Moderate).
Implement conservative management strategies, emphasizing supportive care and addressing functional impairments 1 (Evidence: Expert opinion).References
1 Dżaman K, Zborowska-Piskadło K, Pietniczka-Załęska M, Kantor I. Marcus Gunn (jaw-winking) phenomenon in pediatric otorhinolaryngology practice. International journal of pediatric otorhinolaryngology 2019. link