Electrophysiological monitoring in a patient with an optic nerve glioma

Moradi, Phillip; Robson, Anthony G.; Rose, Geoffrey E.; Holder, Graham E.

doi:10.1007/s10633-008-9118-9

Cited by 13 publications

(8 citation statements)

References 10 publications

(11 reference statements)

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“…However, recent VEP studies suggest that this conclusion should perhaps be reexamined. Wolsey et al [49] reported that VEP abnormalities may be detectable prior to the development of a neuroradiological abnormality, and reports of the value of the VEP in serial monitoring have also recently appeared [50,51 ], showing that VEP abnormalities may progress in the absence of significant neuroradiological change (Fig. 1).…”

Section: Optic Nerve Diseasementioning

confidence: 99%

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Electrodiagnostic assessment in optic nerve disease

Holder

Gale

Acheson

et al. 2009

Current Opinion in Neurology

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Section: Optic Nerve Diseasementioning

confidence: 99%

“…PERG, pattern electroretinogram; VEP, visual evoked potential. Reproduced with permission from [51 ].…”

Section: Albinismmentioning

confidence: 99%

Electrodiagnostic assessment in optic nerve disease

Holder

Gale

Acheson

et al. 2009

Current Opinion in Neurology

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“…Chemotherapy is an option to be considered. Pattern visual evoked potential (VEP) and pattern electroretinograms (ERGs) provide early objective indication of optic nerve dysfunction even in the presence of unchanged neuroradiological features [6]. Figure 1 is a CT scan coronal section of right optic nerve glioma.…”

Section: Intra-orbital and Intra-canalicular Optic Nerve Compressionmentioning

confidence: 99%

Clinical Assessment of Lesions Compressing the Visual Pathway

Abdu¹

2019

Optic Nerve

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There is a close relationship between the visual pathway and other neuro endocrine structures. Tumours and other compressive lesions could often present with visual impairment and/or finite visual field changes. Careful clinical assessment could aid in accurate diagnosis and treatment. Pituitary gland lies in the fossa located in the sphenoid bone. Growth hormone, adreno cortico tropic hormone, and prolactin secreting adenomas could present with respective endocrine features. Optic chiasmal compression by pituitary adenoma is an indicator of suprasellar extension. Meningioma and vestigial remnant craniopharyngioma arise in the parasellar region and can compress on different parts of the optic chiasma often giving rise to classical radiological appearances and visual field changes. This includes atheroma and aneurysm of the internal carotid artery impinging on the temporal chiasma exerting direct pressure and counterpressure on the contralateral side. Others are aneurysms of the precommunicating section of the anterior cerebral artery and those of the posterior communicating artery. Compressive lesions of the visual pathway require a multidisciplinary approach involving neurosurgeon, endocrinologist as well as the ophthalmologist.

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“…Serial pVEPs have been used to determine the effectiveness of occlusion therapy in patients with amblyopia [6,7] and warn of evolving visual pathway dysfunctions in patients with craniosynostosis [8], meningiomas [9], gliomas [10], and hydrocephalus [11]. To monitor patients over serial recordings using pVEPs, it is important to have an understanding of the response variability within a participant, which is not clear from the literature.…”

Section: Introductionmentioning

confidence: 99%

The reproducibility of binocular pattern reversal visual evoked potentials: a single subject design

et al. 2011

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This study aimed to investigate the within-participant variability over time of both amplitude and peak latency measures of pattern reversal visual evoked potentials (pVEPs). As a large number of factors are known to contribute to the variability of the pVEPs (such as fixation instability and drowsiness), testing was conducted in controlled conditions with two co-operative participants. PVEPs were recorded during 24 sessions, over an eight-week period using the same equipment and recording settings. The participants viewed a plasma monitor binocularly from a distance of 1 meter. High contrast (97%), black and white checks of side subtense 50', 25', and 12.5' pattern reversed 3/s in a 28 degree test field. The different sized checks were presented in a pseudo-random order. Three runs, each of 100 trials, were acquired to each stimulus from an active electrode placed at Oz referred to aFz. The amplitude of N80-P100 and the latency of P100 were measured. P100 amplitude and latency were stable across sessions and did not depend upon the order of check size presentation. As expected, variation in amplitude was greater than peak latency. The coefficients of variation for different check sizes and participants were 9-14% for pVEP amplitude, but only 1-2% for P100 latency.

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Electrophysiological monitoring in a patient with an optic nerve glioma

Abstract: Pattern VEPs and pattern ERGs can provide early objective evidence of optic nerve/retinal ganglion cell dysfunction in optic nerve gliomata. Serial recordings can objectively demonstrate worsening function in the absence of significant neuroradiological change.

Cited by 13 publications

References 10 publications

Electrodiagnostic assessment in optic nerve disease

Electrodiagnostic assessment in optic nerve disease

Clinical Assessment of Lesions Compressing the Visual Pathway

The reproducibility of binocular pattern reversal visual evoked potentials: a single subject design

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