Metacontrast masking is influenced by stimulus meaning

1997 ◽  
Author(s):  
Arien Mack ◽  
John Shelley-Tremblay
Keyword(s):  
Metacontrast Masking ◽  
Stimulus Meaning

scholarly journals Comparing sensitivity across different processing measures under metacontrast masking conditions

2007 ◽  
Vol 47 (27) ◽  
pp. 3335-3349 ◽  
Author(s):  
Ulrich Ansorge ◽  
Bruno G. Breitmeyer ◽  
Stefanie I. Becker
Keyword(s):  
Metacontrast Masking

scholarly journals The function of stimulus meaning and ability level in discrimination learning

1966 ◽  
Vol 6 (10) ◽  
pp. 463-464 ◽  
Author(s):  
Norman R. Ellis ◽  
Walter W. Porter
Keyword(s):  
Discrimination Learning ◽  
Ability Level ◽  
Stimulus Meaning

scholarly journals Dichoptic Metacontrast Masking Functions to Infer Transmission Delay in Optic Neuritis

PLoS ONE ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. e0163375
Author(s):  
Maximilian Bruchmann ◽  
Catharina Korsukewitz ◽  
Julia Krämer ◽  
Heinz Wiendl ◽  
Sven G. Meuth
Keyword(s):  
Optic Neuritis ◽  
Transmission Delay ◽  
Metacontrast Masking

scholarly journals Color selective response suppression under metacontrast masking in the human visual cortex

2005 ◽  
Vol 5 (12) ◽  
pp. 29-29
Author(s):  
K. Maeda ◽  
H. Yamamoto ◽  
T. Matsuno ◽  
M. Fukunaga ◽  
A. Nakagoshi
Keyword(s):  
Visual Cortex ◽  
Response Suppression ◽  
Human Visual Cortex ◽  
Metacontrast Masking

scholarly journals Attention and Metacontrast Masking do not Interact

2016 ◽  
Vol 16 (12) ◽  
pp. 1267 ◽  
Author(s):  
Sevda Agaoglu ◽  
Bruno Breitmeyer ◽  
Haluk Ogmen
Keyword(s):  
Metacontrast Masking

Role of an Identified Looming-Sensitive Neuron in Triggering a Flying Locust's Escape

2006 ◽  
Vol 95 (6) ◽  
pp. 3391-3400 ◽  
Author(s):  
Roger D. Santer ◽  
F. Claire Rind ◽  
Richard Stafford ◽  
Peter J. Simmons
Keyword(s):  
Membrane Potential ◽  
Motor Neuron ◽  
High Frequency ◽  
Escape Behavior ◽  
Excitatory Input ◽  
Movement Detector ◽  
Stimulus Meaning ◽  
Contralateral Movement ◽  
Flight Motor

Flying locusts perform a characteristic gliding dive in response to predator-sized stimuli looming from one side. These visual looming stimuli trigger trains of spikes in the descending contralateral movement detector (DCMD) neuron that increase in frequency as the stimulus gets nearer. Here we provide evidence that high-frequency (>150 Hz) DCMD spikes are involved in triggering the glide: the DCMD is the only excitatory input to a key gliding motor neuron during a loom; DCMD-mediated EPSPs only summate significantly in this motor neuron when they occur at >150 Hz; when a looming stimulus ceases approach prematurely, high-frequency DCMD spikes are removed from its response and the occurrence of gliding is reduced; and an axon important for glide triggering descends in the nerve cord contralateral to the eye detecting a looming stimulus, as the DCMD does. DCMD recordings from tethered flying locusts showed that glides follow high-frequency spikes in a DCMD, but analyses could not identify a feature of the DCMD response alone that was reliably associated with glides in all trials. This was because, for a glide to be triggered, the high-frequency spikes must be timed appropriately within the wingbeat cycle to coincide with wing elevation. We interpret this as flight-gating of the DCMD response resulting from rhythmic modulation of the flight motor neuron's membrane potential during flight. This means that the locust's escape behavior can vary in response to the same looming stimulus, meaning that a predator cannot exploit predictability in the locust's collision avoidance behavior.

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