Recovery From Homonymous Hemianopia in Hyperglycemia-Induced Occipital Lobe Electroclinical Seizures Following Glycemic Control.

Background: Visual changes due to hyperglycemia in diabetes are not uncommon. While blurred vision is a well-established sequela of chronic hyperglycemia, homonymous hemianopia with or without electroclinical seizures is much rarer and can be mistaken for migraine, temporal arteritis, or ischemia of the central nervous system.

Methods: This article analyzed case studies for 3 patients (67M, 68M, 52F) presenting with complex visual phenomena, from 3 to 42 days duration, including pathogenesis, clinical findings, management, and follow-up.

Nitrous oxide-induced myeloneuropathy.

Background And Purpose: Nitrous oxide misuse is a recognized issue worldwide. Prolonged misuse inactivates vitamin B12, causing a myeloneuropathy.

Methods: Twenty patients presenting between 2016 and 2020 to tertiary hospitals in Sydney with myeloneuropathy due to nitrous oxide misuse were reviewed.

Dual processing of visual rotation for bipedal stance control.

Key Points: When standing, the gain of the body-movement response to a sinusoidally moving visual scene has been shown to get smaller with faster stimuli, possibly through changes in the apportioning of visual flow to self-motion or environment motion. We investigated whether visual-flow speed similarly influences the postural response to a discrete, unidirectional rotation of the visual scene in the frontal plane. Contrary to expectation, the evoked postural response consisted of two sequential components with opposite relationships to visual motion speed.