Selective adaptation contrast sensitivity a selective

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B. Selective Adaptation: Contrast sensitivity A. Selective Adaptation: Summary Adaptation occurs when there is a reduction in the neuronal response due to prior stimulation. Neurons tuned to a stimulus fatigue when exposure is long. Fatigue or adaptation to stimulus causes Neural firing rate to decrease Neuron to fire less when stimulus immediately presented again Selective means that only those neurons that respond to the specific stimulus adapt. selectively “knock out” groups of neurons for a short period without doing anything invasive. The population signal for a subsequent stimulus will be less influenced by the adapted features. This will result in a perception that is biased away from the adapted stimulus. Adaptation reveals the units of perception that is encoded by visual neurons. Human visual cortex contains pattern analyzers that are specific to spatial-frequency and orientation. B. Brain Decoding in Visual Cortex Kay et al. 2008 Stage 1: fMRI data recorded from V1, V2, and V3 while each subject viewed 1,750 natural images.
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