scholarly journals Effect of transcranial magnetic stimulation on single‐unit activity in the cat primary visual cortex

2003 ◽  
Vol 553 (2) ◽  
pp. 665-679 ◽  
Author(s):  
Vera Moliadze ◽  
Yongqiang Zhao ◽  
Ulf Eysel ◽  
Klaus Funke
Keyword(s):  
Visual Cortex ◽  
Transcranial Magnetic Stimulation ◽  
Primary Visual Cortex ◽  
Unit Activity ◽  
Magnetic Stimulation ◽  
Single Unit ◽  
Single Unit Activity

Single unit activity in the rat visual cortex

1974 ◽  
Vol 14 (4) ◽  
pp. 311-313 ◽  
Author(s):  
C. Shaw ◽  
U. Yinon ◽  
E. Auerbach
Keyword(s):  
Visual Cortex ◽  
Unit Activity ◽  
Single Unit ◽  
Single Unit Activity

Investigation of the primary visual cortex using short-interval paired-pulse transcranial magnetic stimulation (TMS)

2005 ◽  
Vol 382 (3) ◽  
pp. 312-316 ◽  
Author(s):  
Roland Sparing ◽  
Nina Dambeck ◽  
Kathrin Stock ◽  
Ingo G. Meister ◽  
Dorothee Huetter ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Transcranial Magnetic Stimulation ◽  
Primary Visual Cortex ◽  
Magnetic Stimulation ◽  
Short Interval ◽  
Paired Pulse

scholarly journals Primary visual cortex excitability is not atypical in acquired synaesthesia

2019 ◽  
Author(s):  
Laura Lungu ◽  
Ryan Stewart ◽  
David P. Luke ◽  
Devin B. Terhune
Keyword(s):  
Visual Cortex ◽  
Transcranial Magnetic Stimulation ◽  
Primary Visual Cortex ◽  
Magnetic Stimulation ◽  
Neural Mechanisms ◽  
Cortical Hyperexcitability ◽  
Psychedelic Drugs ◽  
Phosphene Threshold ◽  
Threshold Range

AbstractA wealth of data suggests that psychedelic drugs elicit spontaneous perceptual states that resemble synaesthesia although it is unclear whether these different forms of synaesthesia share overlapping neural mechanisms. Multiple studies have shown that developmental and trained synaesthesia is characterized by selective hyperexcitability in primary visual cortex and it has been proposed that cortical hyperexcitability may contribute to induced and acquired synaesthesia. This study tested the prediction that a case of acquired synaesthesia (LW) would display selectively elevated primary visual cortex excitability, as reflected in lower transcranial magnetic stimulation (TMS) phosphene thresholds, but no difference in motor thresholds, relative to controls. In contrast to this prediction, LW’s phosphene threshold was well within the threshold range of controls. These results suggest that acquired synaesthesia is not characterized by atypical visual cortex excitability.

Influence of brain stem oculomotor area stimulation on single unit activity in the visual cortex. Mathematical analysis of results

1970 ◽  
Vol 17 (2) ◽  
pp. 351-354 ◽  
Author(s):  
Guy Orban ◽  
Roland Wissaert ◽  
Mark Callens
Keyword(s):  
Visual Cortex ◽  
Brain Stem ◽  
Unit Activity ◽  
Mathematical Analysis ◽  
Single Unit ◽  
Single Unit Activity ◽  
Analysis Of Results

scholarly journals Primary visual cortex is necessary for blindsight-like behavior in neurologically healthy individuals: Review of transcranial magnetic stimulation studies

2021 ◽  
Author(s):  
Henry Railo ◽  
Mikko Hurme
Keyword(s):  
Visual Cortex ◽  
Transcranial Magnetic Stimulation ◽  
Visual Perception ◽  
Primary Visual Cortex ◽  
Visual Stimulus ◽  
Magnetic Stimulation ◽  
Neural Mechanisms ◽  
Partial Recovery ◽  
Visually Guided ◽  
Healthy Individuals

The visual pathways that bypass the primary visual cortex (V1) are often assumed to support visually guided behavior in humans in the absence of conscious vision. This conclusion is largely based on findings on patients: V1 lesions cause blindness but sometimes leave some visually guided behaviors intact—this is known as blindsight. With the aim of examining how well the findings on blindsight patients generalize to neurologically healthy individuals, we review studies which have tried to uncover transcranial magnetic stimulation (TMS) induced blindsight. In general, these studies have failed to demonstrate a completely unconscious blindsight-like capacity in neurologically healthy individuals. A possible exception to this is TMS-induced blindsight of stimulus presence or location. Because blindsight in patients is often associated with some form of introspective access to the visual stimulus, and may be associated with neural reorganization, we suggest that rather than revealing a dissociation between neural mechanisms of behavior and conscious seeing, blindsight may reflect preservation or partial recovery of conscious visual perception after the lesion.

scholarly journals Multi-Unit Activity contains information about spatial stimulus structure in mouse primary visual cortex

2015 ◽  
Author(s):  
Marie Tolkiehn ◽  
Simon Schultz
Keyword(s):  
Visual Cortex ◽  
Spatial Frequency ◽  
Primary Visual Cortex ◽  
Unit Activity ◽  
Single Unit ◽  
Spatial Stimulus ◽  
Electrophysiological Recordings ◽  
Spatial Frequencies ◽  
Significant Performance ◽  
Directional Preference

This study investigates the spatial and directional tuning of Multi-Unit Activity (MUA) in mouse primary visual cortex and how MUA can reflect spatiotemporal structures contained in moving gratings. Analysis of multi-shank laminar electrophysiological recordings from mouse primary visual cortex indicates a directional preference for moving gratings around 180◦, while preferred spatial frequency peaks around 0.02 cycles per degree, which is similar as reported in single-unit studies. Using only features from MUA, we further achieved a significant performance in decoding spatial frequency or direc- tion of moving gratings, with average decoding performances of up to 58.54% for 8 directions, and 44% correctly identified spatial frequencies against chance level of 16.7%.

Involvement of primary visual cortex in visual mental imagery: A transcranial magnetic stimulation study

1999 ◽  
Vol 25 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Andr� Aleman ◽  
Alfredo A. L. d'Alfonso ◽  
Albert Postma ◽  
Edward H.F. de Haan
Keyword(s):  
Visual Cortex ◽  
Transcranial Magnetic Stimulation ◽  
Primary Visual Cortex ◽  
Mental Imagery ◽  
Magnetic Stimulation ◽  
Visual Mental Imagery
Sign in / Sign up

Export Citation Format

Share Document