Effect of intensity and wavelength of photic stimulus on evoked responses of general cortex and optic tectum in turtles

1968 ◽  
Vol 2 (2) ◽  
pp. 659-668
Author(s):  
T. M. Zagorul'ko
Keyword(s):  
Optic Tectum ◽  
Evoked Responses ◽  
Photic Stimulus

Effect of cooling on photic evoked responses in the optic tectum of teleosts

1979 ◽  
Vol 4 (3) ◽  
pp. 209-212 ◽  
Author(s):  
Wolf Reckhaus ◽  
Heiner Römer ◽  
Hinrich Rahmann
Keyword(s):  
Optic Tectum ◽  
Evoked Responses

p-Chloroamphetamine treatment modifies evoked responses to sinusoidal gratings in the pigeon optic tectum

1989 ◽  
Vol 2 (2) ◽  
pp. 147-152 ◽  
Author(s):  
R. Alesci ◽  
V. Porciatti ◽  
L. Sebastiani ◽  
P. Bagnoli
Keyword(s):  
Receptive Field ◽  
Spatial Frequency ◽  
Optic Tectum ◽  
Temporal Frequency ◽  
Evoked Responses ◽  
Sinusoidal Gratings ◽  
Selective Depletion ◽  
Hydroxyindoleacetic Acid ◽  
Serotonergic Function ◽  
Tectal Neurons

AbstractThis study was performed in order to establish whether selective depletion of serotonin (5-HT) and its metabolite 5-hydroxyindoleacetic acid (5-HIAA) in the pigeon optic tectum (TeO) induced by p-chloroamphetamine (p-CA) modified tectal evoked potentials (TEPs). TEPs in response to sinusoidal gratings of different contrast, spatial and temporal frequency were recorded in control pigeons and in pigeons intraperitoneally injected with p-CA (10 mg/kg; two administrations in consecutive days). TEPs of p-CA treated pigeons, as compared to those of control pigeons, were reduced in amplitude as a function of contrast, spatial and temporal frequency. In addition, TEPs of p-CA treated pigeons differed from those recorded in controls in their transfer characteristics of contrast and spatial frequency. In particular, TEPs of p-CA treated pigeons did not saturate at moderate contrast, unlike those of controls. Furthermore, the TEP spatial tuning in p-CA treated pigeons is broader than that in controls; it thus suggests a reduction of spatial-frequency selectivity. These findings indicate that a selective neurotoxin for serotonergic systems, such as p-CA, can serve as a useful denervation tool for the study of the serotonergic function in the pigeon TeO. In addition, selective changes of TEP properties suggest the possibility that serotonergic afferents play a modulatory role on the receptive-field characteristics of tectal neurons.

Averaged Evoked Responses and Loudness: Analysis of Response Estimates

1968 ◽  
Vol 11 (2) ◽  
pp. 334-342 ◽  
Author(s):  
Gretchen B. Henry ◽  
Donald C. Teas
Keyword(s):  
Noise Burst ◽  
Response Magnitude ◽  
Evoked Responses ◽  
Maximum Estimate

Averaged evoked responses to noise burst signals at six sensation levels were obtained in three experimental contexts and compared on the basis of response magnitude. No significant effects were found related to context; systematic differences were found, however, within the ensemble of responses making up the average. These differences suggest that the maximum estimate of response magnitude may be contained in the first few responses to a series of stimuli.

Lapses in alertness: Brain-evoked responses to task-irrelevant auditory probes.

1992 ◽  
Author(s):  
Scott Makeig ◽  
F. Scot Elliott ◽  
Mark Inlow ◽  
David A. Kobus
Keyword(s):  
Evoked Responses ◽  
Task Irrelevant

Human cerebral evoked responses to odorous stimuli

1966 ◽  
Author(s):  
Truett Allison ◽  
William R. Goff
Keyword(s):  
Evoked Responses
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