Visual Fixation-Induced Hemi-Seesaw Nystagmus

Bowtie, Upbeat and Hemi-seesaw Nystagmus in Medial Medullary Infarction

Medial medullary infarction is characterized by contralateral paralysis of the arm and leg, contralateral loss of position and vibration sense, and an ipsilateral paralysis of the tongue. Rarely, upbeat nystagmus has been described. Bowtie nystagmus, which refers to oblique upbeat nystagmus with horizontal quick phases that alternate from right to left, has been reported in association with tob...

Seesaw nystagmus caused by giant pituitary adenoma: case report.

Giant pituitary adenomas are uncommonly large tumors, greater than 4 cm in size that can produces endocrine symptoms, visual loss and cranial nerve palsies. We report the rare occurrence of seesaw nystagmus as the presenting sign of giant pituitary adenoma. A 50-year-old man presented with headache associated with visual loss and seesaw nystagmus. Perimetry revealed bitemporal hemianopia and ma...

Loss of vision alone may result in seesaw nystagmus.

A patient is described who developed seesaw nystagmus (SSN) associated with progressive severe vision loss due to cone-rod dystrophy. She was otherwise neurologically normal, and findings on magnetic resonance imaging of the brain were normal, including optic chiasm, meso-diencephalic junction, and brainstem. The literature is reviewed on neurologically normal patients with SSN and ocular visio...

Seesaw induced Higgs Mechanism

We discuss a two scalar doublets model which induces the Higgs mechanism by means of a seesaw mechanism. This model naturally predicts a light Higgs scalar whose mass is suppressed by the grand unification scale. The model predicts an intermediate scale between the electroweak symmetry breaking scale and the grand unification scale at 10 GeV. Below this intermediate energy scale the usual stand...

Special effects of brief periods of visual fixation on nystagmus and sensations of turning.