Accession Number : AD1037867


Title :   Self-Regulation of the Primary Auditory Cortex Attention Via Directed Attention Mediated By Real Time fMRI Neurofeedback


Descriptive Note : Conference Paper


Corporate Author : 59th Medical Wing San Antonio United States


Personal Author(s) : Nelson,Jeremy T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1037867.pdf


Report Date : 05 May 2017


Pagination or Media Count : 6


Abstract : 10 healthy volunteers with normal hearing (no more than 1 frequency 40 dB on a standard audiogram) underwent 5 fMRI-NFT sessions. Each session was composed of a simple auditory fMRI followed by 2 runs of Al fMRI-NFT. FMRI data was acquired using 2D, single-shot echo planar imaging during all 3 runs using a 3T. The auditory fMRI was comprised of 6 blocks, each containing a 20s period of no auditory stimulation followed by a 20s period of white noise stimulation at 90 dB. Al activity, defined from a region using the activity during the preceding auditory run, was continuously updated during fMRI-NFT using a simple bar plot, and was accompanied by white noise (90 dB) stimulation for the duration of the scan. Each fMRI-NFT run contained 8 blocks, each separated into a 30s relax period followed by a 30s lower period. Subjects were instructed to watch the bar during the relax condition and actively lower the bar by decreasing A 1 activity during the lower condition. The average A 1 activity was measured from the simple auditory task from each session. Average A 1 deactivation was extracted from each fMRI-NFT run, representative of A 1 self-regulation performance.


Descriptors :   white noise , hearing disorders , acoustic stimulation , frequency , magnetic resonance imaging , mindfulness


Subject Categories : Anatomy and Physiology
      Medicine and Medical Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE