scholarly journals Some determinants of response summation

1997 ◽  
Vol 25 (1) ◽  
pp. 108-121 ◽  
Author(s):  
Aydan Aydin ◽  
John M. Pearce
Keyword(s):  
Response Summation

scholarly journals A test for both positive and negative response summation in the pigeon

1973 ◽  
Vol 2 (6) ◽  
pp. 433-435 ◽  
Author(s):  
Robert J. Hamm ◽  
Donald Meltzer
Keyword(s):  
Negative Response ◽  
Response Summation

scholarly journals Stimulus parameters producing response summation

1972 ◽  
Vol 29 (3) ◽  
pp. 155-157 ◽  
Author(s):  
Donald Meltzer ◽  
Mark A. Masaki
Keyword(s):  
Response Summation ◽  
Stimulus Parameters

scholarly journals Maintenance of response summation under conditions of minimum stimulus intensity

1971 ◽  
Vol 22 (5) ◽  
pp. 287-289 ◽  
Author(s):  
Donald Meltzer ◽  
Betty Jo Freeman
Keyword(s):  
Stimulus Intensity ◽  
Response Summation

Angular Induction as a Function of the Length and Position of Segments and Gaps

Perception ◽  
1994 ◽  
Vol 23 (7) ◽  
pp. 785-801 ◽  
Author(s):  
Ernest Greene ◽  
Daniel Levinson
Keyword(s):  
Visual Angle ◽  
Poggendorff Illusion ◽  
Systems Approach ◽  
Neural Substrates ◽  
Short Segment ◽  
Test Segment ◽  
Response Summation ◽  
Perceptual Distortions ◽  
Log Linear ◽  
Line Elements

The perceptual distortions which are manifested in the Poggendorff illusion can be studied with the use of a more restricted set of stimulus elements. Experiments were designed in which angular induction effects between two line elements, known respectively as the test segment and induction segment, were evaluated. In some stimulus configurations the induction ‘segment’ consisted of a tandem pair of segments. Previous studies had shown that the induction segment will bias operant judgments of collinearity for a test segment, this effect being a function of the relative angle between the two. Six experiments are reported, in which the length and position of segments in relation to the tip of the test segment were varied. It was found that substantial induction is produced by a very short segment, and that this can bias judgment even when its displacement spans more than 10 deg of visual angle. Several aspects of the data suggest that the strength of effect is a log—linear function of segment position. However, the results from displacement of single or tandem segments do not conform to predictions based on length/response summation, and thus do not support a linear-systems approach. Neural substrates for these interactions are given brief attention.

scholarly journals Integration of Evoked Responses in Supragranular Cortex Studied With Optical Recordings In Vivo

2006 ◽  
Vol 96 (1) ◽  
pp. 336-351 ◽  
Author(s):  
Eugene F. Civillico ◽  
Diego Contreras
Keyword(s):  
High Speed ◽  
Barrel Cortex ◽  
Somatosensory System ◽  
Electrical Stimulus ◽  
Evoked Responses ◽  
Response Summation ◽  
Sensory Cortices ◽  
Functional Representations ◽  
Whisker Stimulation

Complex representations in sensory cortices rely on the integration of inputs that overlap temporally and spatially, particularly in supragranular layers, yet the spatiotemporal dynamics of this synaptic integration are largely unknown. The rodent somatosensory system offers an excellent opportunity to study these dynamics because of the overlapping functional representations of single-whisker inputs. We recorded responses in mouse primary somatosensory (barrel) cortex to single and paired whisker deflections using high-speed voltage-sensitive dye imaging. Responses to paired deflections at intervals of 0 and 10 ms summed sublinearly, producing a single transient smaller in amplitude than the sum of the component responses. At longer intervals of 50 and 100 ms, the response to the second deflection was reduced in amplitude and limited spatially relative to control. Between 100 and 200 ms, the response to the second deflection recovered and often showed areas of facilitation. With increasing interstimulus interval from 50 to 200 ms, recovery of the second response occurred from the second stimulated whisker’s barrel column outward. In contrast to results with paired-whisker stimulation, when a whisker deflection was preceded by a weak electrical stimulus applied to the neighboring cortex, the summation of evoked responses was predominantly linear at all intervals tested. Thus under our conditions, the linearity of response summation in cortex was not predicted by the amplitudes of the component responses on a column-by-column basis, but rather by the timing and nature of the inputs.

scholarly journals Stimulus compounding and response summation with an instrumental running response

1971 ◽  
Vol 22 (1) ◽  
pp. 52-53 ◽  
Author(s):  
Laurence Miller ◽  
Ronald D. Price
Keyword(s):  
Stimulus Compounding ◽  
Response Summation
Sign in / Sign up

Export Citation Format

Share Document