scholarly journals Electrically Evoked Responses in the Rabbit Cortex Induced by Current Steering With Penetrating Optic Nerve Electrodes

2016 ◽  
Vol 57 (14) ◽  
pp. 6327 ◽  
Author(s):  
Yan Yan ◽  
Yiliang Lu ◽  
Menghui Li ◽  
Zengguang Ma ◽  
Pengjia Cao ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Evoked Responses ◽  
Current Steering ◽  
Nerve Electrodes

Optic Nerve Decompression for Osteopetrosis in Early Childhood

Neurosurgery ◽  
1988 ◽  
Vol 23 (4) ◽  
pp. 470-475 ◽  
Author(s):  
Stephen J. Haines ◽  
Donald L. Erickson ◽  
Jonathan D. Wirtschafter
Keyword(s):  
Early Childhood ◽  
Optic Nerve ◽  
Visual Function ◽  
Behavioral Observation ◽  
Surgical Decompression ◽  
Evoked Responses ◽  
Visual Evoked Responses ◽  
Nerve Dysfunction ◽  
Visual Failure ◽  
Visual Evoked

Abstract Visual failure in osteopetrosis may result from retinal degeneration or compression of the optic nerve in the narrowed optic canals. We report the evaluation and treatment of five children with osteopetrosis whose optic nerve dysfunction seems to have been related to the latter etiology. Evaluation of visual function was carried out by means of behavioral observation and flash visual evoked responses. Of six nerves evaluated both pre- and postoperatively, the visual evoked responses seemed to improve in four. Three nerves were serially evaluated without an operation, and one showed changes consistent with maturation. One nerve was evaluated with serial postoperative evoked potentials and showed no change. We conclude that surgical decompression of the optic nerve in patients with documented optic nerve dysfunction and osteopetrosis allows improvement in visual function and is, therefore, an important consideration in the evaluation and management of patients with this disease.

A simulation of current focusing and steering with penetrating optic nerve electrodes

2013 ◽  
Vol 10 (6) ◽  
pp. 066007 ◽  
Author(s):  
Menghui Li ◽  
Yan Yan ◽  
Qixin Wang ◽  
Honghong Zhao ◽  
Xinyu Chai ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Current Focusing ◽  
Nerve Electrodes

Optic nerve axonal pathology is related to abnormal visual evoked responses in AIDS

2006 ◽  
Vol 112 (4) ◽  
pp. 461-469 ◽  
Author(s):  
Anita Mahadevan ◽  
Parthasarathy Satishchandra ◽  
Krishnamurthy Kulkarni Prachet ◽  
Nagadenahalli Byrareddy Sidappa ◽  
Udaykumar Ranga ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Evoked Responses ◽  
Visual Evoked Responses ◽  
Axonal Pathology ◽  
Abnormal Visual ◽  
Visual Evoked

Monitoring optic nerve function during craniotomy

1976 ◽  
Vol 44 (1) ◽  
pp. 29-31 ◽  
Author(s):  
Moshe Feinsod ◽  
John B. Selhorst ◽  
William F. Hoyt ◽  
Charles B. Wilson
Keyword(s):  
Pituitary Adenoma ◽  
Optic Nerve ◽  
Surgical Removal ◽  
Evoked Responses ◽  
Nerve Function ◽  
Normal Vision ◽  
Content Type ◽  
Visual Evoked Responses ◽  
Normal Latency ◽  
Fine Print

✓ During surgical removal of a pituitary adenoma, conduction in the anterior visual pathways was monitored by continuous recording of visual evoked responses (VER). The method employed a scleral contact lens with an embedded flashing diode for delivery of visual stimuli. Evoked potentials of nearly normal latency, amplitude, and form were recorded from occipital scalp electrodes immediately after the optic nerves were decompressed. Restoration of the VER was correlated with restoration of normal vision.

Oligodendrocytes in Developing Hameter Cerebral Cortex

1976 ◽  
Vol 34 ◽  
pp. 126-127
Author(s):  
MB. Tank Buschmann
Keyword(s):  
Cerebral Cortex ◽  
Optic Nerve ◽  
Frontal Cortex ◽  
Osmium Tetroxide ◽  
Sodium Cacodylate Buffer ◽  
Sodium Cacodylate ◽  
Tissue Samples ◽  
Cacodylate Buffer ◽  
Layer V ◽  
Adult Hamster

Development of oligodendrocytes in rat corpus callosum was described as a sequential change in cytoplasmic density which progressed from light to medium to dark (1). In rat optic nerve, changes in cytoplasmic density were not observed, but significant changes in morphology occurred just prior to and during myelination (2). In our study, the ultrastructural development of oligodendrocytes was studied in newborn, 5-, 10-, 15-, 20-day and adult frontal cortex of the golden hamster (Mesocricetus auratus).Young and adult hamster brains were perfused with paraformaldehyde-glutaraldehyde in sodium cacodylate buffer at pH 7.3 according to the method of Peters (3). Tissue samples of layer V of the frontal cortex were post-fixed in 2% osmium tetroxide, dehydrated in acetone and embedded in Epon-Araldite resin.

Averaged Evoked Responses and Loudness: Analysis of Response Estimates

1968 ◽  
Vol 11 (2) ◽  
pp. 334-342 ◽  
Author(s):  
Gretchen B. Henry ◽  
Donald C. Teas
Keyword(s):  
Noise Burst ◽  
Response Magnitude ◽  
Evoked Responses ◽  
Maximum Estimate

Averaged evoked responses to noise burst signals at six sensation levels were obtained in three experimental contexts and compared on the basis of response magnitude. No significant effects were found related to context; systematic differences were found, however, within the ensemble of responses making up the average. These differences suggest that the maximum estimate of response magnitude may be contained in the first few responses to a series of stimuli.

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