35 research outputs found
Horizontal Midbrain Ophthalmoparesis
Ptosis; Binocular limitation of elevation and limited depression and adduction of the left eyeCase 1: A 54-year old female with bilateral ptosis following renal transplantation. Case 2: A 64-year old male with binocular limitation of elevation and limited depression and adduction OS four months after lobectomy for squamous cell carcinoma of the lung.Case 1: Bilateral ptosis Case 2: Focal lesionCTSubnormal saccades; DyskinesiasCase 1: XRTN/
Gaze Palsies
The function of the ocular motor system is to acquire and maintain target fixation. This necessitates proper functioning of higher cortical centers responsible for choosing appropriate targets and generating commands, intact pathways descending from cortical regions, properly functioning brain stem nuclear and internuclear structures, and intact motoneurons to overcome the mechanics of the ocular plant
The Ocular Motor Nuclei and Ophthalmoplegia
This paper will review the patho-physiology of lesions affecting the ocular motor nuclei. I will not consider previous reports of damage to these structures but will instead focus upon the anatomy and neuro-physiology.ICnuclearcenter
The Ocular Tilt Reaction and Skew Deviation
The ocular tilt reaction composes a triad of ipsilateral head-tilt, ipsilateral conjugate ocular torsion, and skew deviation with ipsilateral hypotropia. It results from a disruption of central vestibular pathways conveying information from the semicircular canals and otoliths. Skew deviation is one component of the syndrome which may or may not be associated with the concomitant torsion and head-tilt of the ocular tilt reaction. Because of the frequent clinical presentation of skew deviation it merits special attention
Vigabatrin and Visual Loss
Vigabatrin is an anti-epileptic agent which inhibits the enzyme responsible for the catabolism of the inhibitory neurotransmitter gamma-aminobutyric (GABA)
Vertical Supranuclear Gaze Palsy and Intrathoracic Carcinoid Tumor
A 52 year old Chinese gentleman had a two and a half year history of carcinoid tuner of the thymuses with lung metastases