Non-linear spatial summation in cat retinal ganglion cells at different background levels

1979 ◽  
Vol 36 (2) ◽  
Author(s):  
R.A. Linsenmeier ◽  
H.G. Jakiela
Keyword(s):  
Retinal Ganglion Cells ◽  
Ganglion Cells ◽  
Spatial Summation ◽  
Retinal Ganglion ◽  
Background Levels ◽  
Non Linear

Receptive-field properties of Q retinal ganglion cells of the cat

1995 ◽  
Vol 12 (2) ◽  
pp. 285-300 ◽  
Author(s):  
J.B. Troy ◽  
D.E. Schweitzer-Tong ◽  
Ch. Enroth-Cugell
Keyword(s):  
Receptive Field ◽  
Retinal Ganglion Cells ◽  
Ganglion Cells ◽  
Quantitative Description ◽  
Spatial Summation ◽  
Nonlinear Behavior ◽  
Retinal Ganglion ◽  
Temporal Properties ◽  
X Cells ◽  
Y Cells

AbstractThe goal of this work was to provide a detailed quantitative description of the recepii ve-field properties of one of the types of rarely encountered retinal ganglion cells of cat; the cell named the Q-cell by Enroth-Cugell et al. (1983). Quantitative comparisons are made between the discharge statistics and between the spatial receptive properties of Q-cells and the most common of cat retinal ganglion cells, the X-cells. The center-surround receptive field of the Q-cell is modeled here quantitatively and the typical Q-cell is described. The temporal properties of the Q-cell receptive field were also investigated and the dynamics of the center mechanism of the Q-cell modeled quantitatively. In addition, the response vs. contrast relationship for a Q-cell at optimal spatial and temporal frequencies is shown, and Q-cells are also demonstrated to have nonlinear spatial summation somewhat like that exhibited by Y-cells, although much higher contrasts are required to reveal this nonlinear behavior. Finally, the relationship between Q-cells and Barlow and Levick's (1969) luminance units was investigated and it was found that most Q-cells could not be luminance units.

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