MILLARD-GUBLER SYNDROME: CLINICAL INSIGHTS INTO THE NEUROANATOMY AND DIAGNOSIS OF VENTRAL PONTINE SYNDROMES

Michelle Tobias-Pavelle

Abstract


Background: Millard-Gubler Syndrome (MGS) is a classic brainstem stroke syndrome characterized by a unique "crossed" presentation of neurological deficits. First described in the mid-19th century, it remains a critical clinical model for understanding the functional anatomy of the pons. Pathophysiology: The syndrome results from a localized lesion in the ventral-caudal pons, typically involving the exit fibers of the abducens (VI) and facial (VII) cranial nerves, alongside the descending uncrossed corticospinal tract. The anatomical proximity of these structures allows a single focal insult—most commonly a vascular occlusion of the basilar artery branches—to produce a highly specific constellation of symptoms. Clinical Presentation: Patients present with ipsilateral abducens nerve palsy (diplopia and medial strabismus) and ipsilateral facial nerve palsy (lower motor neuron type), coupled with contralateral hemiparesis or hemiplegia of the trunk and extremities. This "crossed" nature (ipsilateral cranial nerve signs and contralateral motor signs) is the diagnostic hallmark of brainstem localization. Conclusion: While modern neuroimaging, specifically Magnetic Resonance Imaging (MRI), has revolutionized the detection of pontine lesions, the diagnosis of Millard-Gubler Syndrome remains primarily clinical. Understanding the presentation of MGS is essential for rapid localization of brainstem pathology and the timely initiation of stroke management or neuro-oncological intervention. 

 

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Keywords


Millard-Gubler Syndrome; crossed hemiplegia; ventral pontine syndrome; abducens nerve palsy; facial nerve palsy; corticospinal tract, brainstem stroke

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References


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DOI: http://dx.doi.org/10.46827/ejphs.v8i4.236

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