A 31-year-old patient had acute dizziness and lateropulsion to the right. Neuro-ophthalmologic examination revealed (1) a saccade gaze palsy left (video 1, part A), (2) “half-pathologic” head-impulse test right B), but (3) bilaterally normal adduction during convergence reaction C), findings typical for abducens nuclear palsy. It was caused by histologically proven cavernoma in tegmentum pontis...

Humans use the direction of eye gaze and facial identity to make important social judgments. We carried out the first measurements of spatial frequency (SF) tuning for judgments of eye gaze, and compared SF tuning for judgments of facial identity and eye gaze. In Experiment 1, participants discriminated between leftward and rightward shifts of gaze, or between two male faces or two female faces...

We report the case of a 16 year old girl with vertical-torsional oscillations. She had a 4 year history of bilateral horizontal gaze palsy caused by a cavernous angioma in the medial part of the dorsal pons. She presented with vertical oscillopsia that had worsened during the past 3 months. Unilateral three dimensional eye movements and bilateral horizontal eye movements were recorded using a m...

BACKGROUND/HYPOTHESIS With the video head impulse test (vHIT), the vertical VOR gain is defined as (vertical eye velocity/vertical head velocity), but compensatory eye movements to vertical canal stimulation usually have a torsional component. To minimize the contribution of torsion to the eye movement measurement, the horizontal gaze direction should be directed 40° from straight ahead so it i...

Eight and half syndrome is one of the rare neurological disorders, which usually overlooked in our clinical practice. Here I report 58 years-old hypertensive Indian gentleman presented with horizontal gaze palsy facial weakness.

BACKGROUND Anti-GQ1b antibody has been found in Miller Fisher syndrome (MFS), Guillain-Barré syndrome (GBS) with ophthalmoplegia, Bickerstaff brainstem encephalitis (BBE), and acute ophthalmoplegia without ataxia (AO). The aim of this study was to determine the clinical features of AO associated with anti-GQ1b antibody. METHODS We retrospectively collected 34 patients with anti-GQ1b antibody ...

Objective To quantify fixation stability of the upward gaze in patients with myasthenia gravis (MG) using an eye tracker. Methods and analysis In this study, 21 normal subjects, 5 patients with MG with diplopia, 5 patients with MG without diplopia and 6 patients with superior oblique (SO) palsy were included. Subjects fixated on a target in the upward direction for 1 min. The horizontal (X) a...

introduction the abducent nucleus is located in the upper part of the rhomboid fossa beneath the fourth ventricle in the caudal portion of the pons. the abducent nerve courses from its nucleus, to innervate the lateral rectus muscle. this nerve has the longest subarachnoid course of all the cranial nerves, it is the cranial nerve most vulnerable to trauma. it has been reported that 1% to 2.7% o...