Die Sehbahn in Chirurgischer Beziehung und die Faradische Reizung des Sehzentrums

Krause, Fedor

doi:10.1007/bf01735820

Cited by 31 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As early as 1918, Löwenstein and Borchardt (1) reported that while performing an operation to remove bone fragments caused by a bullet wound, the patient's left occipital lobe was electrically stimulated, and the patient perceived flickering in the right visual field. Foerster (2) and Krause (3) reported similar cases of visual perception caused by electrical stimulation of the visual cortex during removal an occipital epileptic focus. The significance of these studies was that they demonstrated that the position of electrically induced visual percepts within the visual field was systematically related to the area of the occipital lobe that received the electrical stimulation.…”

mentioning

confidence: 97%

A Model for Intracortical Visual Prosthesis Research

et al. 2003

View full text Add to dashboard Cite

In the field of visual prosthesis research, it has generally been held that animal models are limited to testing the safety of implantable hardware due to the inability of the animal to provide a linguistic report of perceptions. In contrast, vision scientists make extensive use of trained animal models to investigate the links between visual stimuli, neural activities, and perception. We describe an animal model for cortical visual prosthesis research in which novel animal psychophysical testing has been employed to compensate for the lack of a linguistic report. One hundred and fifty-two intracortical microelectrodes were chronically implanted in area V1 of a male macaque. Receptive field mapping was combined with eye-tracking to develop a reward-based training procedure. The animal was trained to use electrically induced point-flash percepts, called phosphenes, in performing a memory saccade task. It is our long-term goal to use this animal model to investigate stimulation strategies in developing a multichannel sensory cortical interface.

show abstract

mentioning

confidence: 97%

A Model for Intracortical Visual Prosthesis Research

et al. 2003

View full text Add to dashboard Cite

show abstract

“…The very important study of Borchardt and Lowenstein demonstrated that electrical stimulation produced the same disturbances in the patient as those which took place spontaneousy: turning of the patient's eyes to the right; scintillation; flames; visual hallucinations. Krause in a similar study ascertained the interesting fact that the experimentally produced subjective visual phenomena did not leave any after-images (148).…”

mentioning

confidence: 78%

Visual disturbances after cerebral lesions.

ver¹

1927

Psychological Bulletin

View full text Add to dashboard Cite

(A review of literature: 271 titles.) Three chief lines of investigation may be distinguished. (1) Henschen's view that retinal points are projected upon the cortex in a circumscribed and point by point way, rather than diffuse as urged by von Monakow, tends to be strengthened by the bulk of clinical findings in connection with war cases. Localization in the area striata is favored by many. As to the cortical representation of color vision no definite results have been obtained. (2) Brain localization of higher optical processes, such as depth-perception, form-perception, etc., although much studied, is not in an advanced stage. It has been urged that the physiologist needs here to employ psychological methods in addition to his anatomical and pathological technique. (3) In the light of work on visual disturbances, cerebral localization in general is coming to be recognized as decidedly an open question. For instance, Goldstein makes the interesting suggestion that the two extreme views of von Monakow and Henschen may each be both right and wrong; as fibers from a specific retinal part may run not only to a localizable projection center but also diffuse more generally. Furthermore "we are likely to be fascinated by histological results when it is possible that electrochemical processes are the basis for function."

show abstract

“…Eliciting visual perception via electrical stimulation of the visual cortices was first reported in a case study by Löwenstein and Borchardt in 1918 where wounded soldiers were able to see flickering light perceptions on the opposite half of their visual field after stimulation of occipital lobe [44]. This was then followed by the work of Förster and Krause who were able to expose the human occipital lobe under local anesthesia and reliably induce perception of phosphenes [45,46]. These studies set the groundwork for the first systematic effort to develop a visual cortical prosthetic by Brindley and Lewin [47].…”

Section: Historymentioning

confidence: 97%

Brain Machine Interfaces for Vision Restoration: The Current State of Cortical Visual Prosthetics

Niketeghad

Pouratian

2019

Neurotherapeutics

View full text Add to dashboard Cite

Loss of vision alters the day to day life of blind individuals and may impose a significant burden on their family and the economy. Cortical visual prosthetics have been shown to have the potential of restoring a useful degree of vision via stimulation of primary visual cortex. Due to current advances in electrode design and wireless power and data transmission, development of these prosthetics has gained momentum in the past few years and multiple sites around the world are currently developing and testing their designs. In this review, we briefly outline the visual prosthetic approaches and describe the history of cortical visual prosthetics. Next, we focus on the state of the art of cortical visual prosthesis by briefly explaining the design of current devices that are either under development or in the clinical testing phase. Lastly, we shed light on the challenges of each design and provide some potential solutions.

show abstract

Die Sehbahn in Chirurgischer Beziehung und die Faradische Reizung des Sehzentrums

Cited by 31 publications

References 0 publications

A Model for Intracortical Visual Prosthesis Research

A Model for Intracortical Visual Prosthesis Research

Visual disturbances after cerebral lesions.

Brain Machine Interfaces for Vision Restoration: The Current State of Cortical Visual Prosthetics

Contact Info

Product

Resources

About