Stabilization of single unit responses of the visual cortex in unanesthetized rabbits to repeated photic stimulation

1968 ◽  
Vol 2 (3) ◽  
pp. 791-797 ◽  
Author(s):  
E. N. Sokolov ◽  
V. B. Polyanskii ◽  
A. Bagdonas
Keyword(s):  
Visual Cortex ◽  
Single Unit ◽  
Photic Stimulation

scholarly journals Decrease of glucose in the human visual cortex during photic stimulation

1992 ◽  
Vol 25 (1) ◽  
pp. 187-194 ◽  
Author(s):  
Klaus-Dietmar Merboldt ◽  
Harald Bruhn ◽  
Wolfgang Hanicke ◽  
Thomas Michaelis ◽  
Jens Frahm
Keyword(s):  
Visual Cortex ◽  
Photic Stimulation ◽  
Human Visual Cortex

scholarly journals Does visual cortex lactate increase following photic stimulation in migraine without aura patients? A functional 1H-MRS study

2011 ◽  
Vol 12 (3) ◽  
pp. 295-302 ◽  
Author(s):  
Harmen Reyngoudt ◽  
Koen Paemeleire ◽  
Anneloor Dierickx ◽  
Benedicte Descamps ◽  
Pieter Vandemaele ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Migraine Without Aura ◽  
Photic Stimulation ◽  
1H Mrs

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

Haloperidol abolished glutamate release evoked by photic stimulation of the visual cortex in rats

2002 ◽  
Vol 327 (3) ◽  
pp. 149-152 ◽  
Author(s):  
Elbert Reyes ◽  
Sergio Rossell ◽  
Daniel Paredes ◽  
Pedro Rada ◽  
Sonia Tucci ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Glutamate Release ◽  
Photic Stimulation ◽  
Stimulation Of

Single unit reactions in the visual cortex of the unanesthetized rabbit to the light flashes of different intensities

1973 ◽  
Vol 13 (4) ◽  
pp. 809-827 ◽  
Author(s):  
V.B. Polyansky ◽  
E.N. Sokolov ◽  
E.V. Polkoshnikov ◽  
M.M. Zimachev
Keyword(s):  
Visual Cortex ◽  
Single Unit ◽  
Unanesthetized Rabbit ◽  
Light Flashes

scholarly journals Effect of Photic Stimulation on Human Visual Cortex Lactate and Phosphates Using 1H and 31P Magnetic Resonance Spectroscopy

1992 ◽  
Vol 12 (4) ◽  
pp. 584-592 ◽  
Author(s):  
D. Sappey-Marinier ◽  
G. Calabrese ◽  
G. Fein ◽  
J. W. Hugg ◽  
C. Biggins ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Visual Cortex ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Brain Activity ◽  
Atp Synthesis ◽  
High Energy ◽  
Significant Rise ◽  
Photic Stimulation ◽  
Resonance Spectroscopy

Previous animal and human studies showed that photic stimulation (PS) increased cerebral blood flow and glucose uptake much more than oxygen consumption, suggesting selective activation of anaerobic glycolysis. In the present studies, image-guided 1H and 31P magnetic resonance spectroscopy (MRS) was used to monitor the changes in lactate and high-energy phosphate concentrations produced by PS of visual cortex in six normal volunteers. PS initially produced a significant rise (to 250% of control, p < 0.01) in visual cortex lactate during the first 6.4 min of PS, followed by a significant decline ( p = 0.01) as PS continued. The PCr/Pi ratios decreased significantly from control values during the first 12.8 min of PS ( p < 0.05), and the pH was slightly increased. The positive P100 deflection of the visual evoked potential recorded between 100 and 172 ms after the strobe was significantly decreased from control at 12.8 min of PS ( p < 0.05). The finding that PS caused decreased PCr/Pi is consistent with the view that increased brain activity stimulated ATPase, causing a rise in ADP that shifted the creatine kinase reaction in the direction of ATP synthesis. The rise in lactate together with an increase in pH suggest that intracellular alkalosis, caused by the shift of creatine kinase, selectively stimulated glycolysis.

scholarly journals A Sparse Unreliable Distributed Code Underlies the Limits of Behavioral Discrimination

2018 ◽  
Author(s):  
Balaji Sriram ◽  
Alberto Cruz-Martin ◽  
Lillian Li ◽  
Pamela Reinagel ◽  
Anirvan Ghosh
Keyword(s):  
Visual Cortex ◽  
Visual System ◽  
Single Unit ◽  
Discrimination Task ◽  
Orientation Discrimination ◽  
Behavioral Performance ◽  
High Contrast ◽  
The World ◽  
Mouse Visual Cortex ◽  
Linear Decoding

ABSTRACTThe cortical code that underlies perception must enable subjects to perceive the world at timescales relevant for behavior. We find that mice can integrate visual stimuli very quickly (<100 ms) to reach plateau performance in an orientation discrimination task. To define features of cortical activity that underlie performance at these timescales, we measured single unit responses in the mouse visual cortex at timescales relevant to this task. In contrast to high contrast stimuli of longer duration, which elicit reliable activity in individual neurons, stimuli at the threshold of perception elicit extremely sparse and unreliable responses in V1 such that the activity of individual neurons do not reliably report orientation. Integrating information across neurons, however, quickly improves performance. Using a linear decoding model, we estimate that integrating information over 50-100 neurons is sufficient to account for behavioral performance. Thus, at the limits of perception the visual system is able to integrate information across a relatively small number of highly unreliable single units to generate reliable behavior.

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