Neurophysiological evidence for context-dependent encoding of sensory input in human auditory cortex.
Attention biases the way in which sound information is stored in auditory memory. Little is known, however, about the contribution of stimulus-driven processes in forming and storing coherent sound events. An electrophysiological index of cortical auditory change detection (mismatch negativity [MMN]) was used to assess whether sensory memory representations could be biased toward one organization over another (one or two auditory streams) without attentional control. Results revealed that sound representations held in sensory memory biased the organization of subsequent auditory input. The results demonstrate that context-dependent sound representations modulate stimulus-dependent neural encoding at early stages of auditory cortical processing.
Sussman
Elyse
E
Department of Neuroscience, Albert Einstein College of Medicine, 1410 Pelham Parkway South, NY 10461, USA. esussman@aecom.yu.edu
Steinschneider
Mitchell
M
D000161:Acoustic Stimulation; D000328:Adult; D001288:Attention / Q000502:physiology*; D001303:Auditory Cortex / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods*; D004569:Electroencephalography; D005071:Evoked Potentials; D005260:Female; D006309:Hearing / Q000502:physiology*; D006801:Humans; D008297:Male; D008568:Memory / Q000502:physiology*; D008875:Middle Aged; D012677:Sensation