RESUMO
The artery of Percheron (AOP), a variation of the thalamic vasculature, supplies both the thalamus and the midbrain. An infarct in this area is characterized by wide neurological abnormalities, the most common of which are altered mental state, decreased degree of consciousness, and memory impairment. AOP infarcts tend to be missed during the initial computed tomography (CT) scan. The number of reports on AOP infarction has been increasing, highlighting the range of clinical presentations and challenges that clinicians can face. This case study discusses a 58-year-old male patient who was diagnosed with stroke in AOP territory without any clear neurological symptoms, and it serves as a model for patients with similar conditions.
RESUMO
Internuclear ophthalmoplegia (INO) is a condition characterized by impaired ocular movement, leading to an inability to perform coordinated lateral gaze, resulting in ophthalmoplegia. This impairment results from damage to the medial longitudinal fasciculus (MLF), which can occur because of various types of lesions localized in the pons or midbrain. In this case, we report on a 67-year-old man with multiple comorbidities who arrived at the emergency department with complaints of sudden dizziness and an unsteady gait. During the examination, he exhibited left INO, which was characterized by limited left eye adduction and multidirectional nystagmus of the right eye when performing right lateral gaze.
