Temporal receptive windows in the brain NBE-E5700 Introduction to Cognitive Neuroscience Gustaf Lönn, 9.2.2016.

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Presentation transcript:

Temporal receptive windows in the brain NBE-E5700 Introduction to Cognitive Neuroscience Gustaf Lönn,

Temporal: Processing at different time scales short timelong time phoneme syllable word sentence paragraph text

Receptive field: Visual system receptive field of a neuron: part of the visual field that influences the firing rate of the neuron low-level (sensory) high-level (perceptual, cognitive) M. Bear et al. (2016): Neuroscience: exploring the brain (4th ed.), p. 363

Temporal receptive windows same idea as for receptive fields temporally (instead of spatially) distributed TRW = time interval before a response during which stimuli influence the response of the neuron functional implications short TRW ”  ” low-level processing long TRW ”  ” high-level processing

green = stimulus pink = no input

Two papers TRWs in the visual system Hasson, U. (2008): A Hierarchy of Temporal Receptive Windows in Human Cortex TRWs in the auditory system Lerner, Y. (2011): Topographic Mapping of a Hierarchy of Temporal Receptive Windows Using a Narrated Story

Methodology use complex naturalistic stimuli visual: classic silent movies auditory: narrated real-life story different versions forward backward temporally scrambled measure BOLD-signal using fMRI

Methodology each condition measured twice correlation between time series calculated (reliability) short TRW: high reliability even if scrambled long TRW: scrambling reduces reliability

Summary The brain processes data at different time scales TRW = time interval before response during which stimuli influence the response of the neuron Areas of the brain with TRWs of different lengths have been identified both in the visual and auditory pathways

References Bear, M. et al. (2016): Neuroscience : exploring the brain (4 th ed.), Wolters Kluwer Hasson, U. et al. (2008): A Hierarchy of Temporal Receptive Windows in Human Cortex, J Neurosci 28: Jääskeläinen, I. (2012): Introduction to Cognitive Neuroscience Lerner, Y. et al. (2011): Topographic Mapping of a Hierarchy of Temporal Receptive Windows Using a Narrated Story, J Neurosci 31: