We analyzed the variability of response in records obtained from MT (V5) of awake, behaving monkeys and kindly provided to us by Newsome and Bair (see Newsome et al 1990 for Methods). Some sets of random dot kinematograms had been generated with a constant randomization seed (novar stimuli), while others had been generated with varying randomization seeds (var stimuli). The neural responses to novar stimuli exhibited a remarkable degree of consistent temporal modulation, while the responses to var stimuli were homogeneous over the presentation time. We suspected that correspondence noise might be a major source of variability and to test this we compared the variability of response to novar and var stimuli, making the assumption that the variability observed in responses to novar stimuli reflected the internal noise only, whereas variability in the case of var stimuli reflected internal noise and external noise. From this assumption, we could estimate the relative importance of external noise and internal noise in this system. The main conclusions are:- (1) Efficiency values (up to about 35%) calculated from neural responses in MT are of the same order as those of human observers, (Barlow and Tripathy 1997) (2) External correspondence noise is a significant factor in limiting the detectability of coherent motion in these random dot stimuli.
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
References found in this work BETA
No references found.
Citations of this work BETA
No citations found.
Similar books and articles
Internal Mechanisms That Implicate the Self Enlighten the Egoism-Altruism Debate.Constantine Sedikides & Aiden P. Gregg - 2002 - Behavioral and Brain Sciences 25 (2):274-275.
Do Stimuli Elicit Behavior?--A Study in the Logical Foundations of Behavioristics.William W. Rozeboom - 1960 - Philosophy of Science 27 (2):159-170.
Mental Training Enhances Attentional Stability: Neural and Behavioral Evidence.Antoine Lutz - unknown
A “Presence/Absence Hypothesis” Concerning Hippocampal Function.David J. Murray - 1999 - Behavioral and Brain Sciences 22 (3):462-463.
How the Interplay Between Antigen Presenting Cells and Microbiota Tunes Host Immune Responses in the Gut.Bartlomiej Swiatczak & Maria Rescigno - 2012 - Seminars in Immunology 24 (1):43-49.
Sorites Without Vagueness I: Classificatory Sorites.Ehtibar N. Dzhafarov & Damir D. Dzhafarov - 2010 - Theoria 76 (1):4-24.
A Binocular Rivalry Study of Motion Perception in the Human Brain.K. Moutoussis, G. A. Keliris, Z. Kourtzi & N. K. Logothetis - 2005 - Vision Research 45 (17):2231-43.
Added to index2009-01-28
Total downloads19 ( #258,613 of 2,169,136 )
Recent downloads (6 months)1 ( #345,573 of 2,169,136 )
How can I increase my downloads?