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UID:20251216T203845EST-4184BPk4Xs@132.216.98.100
DTSTAMP:20251217T013845Z
DESCRIPTION:The Feindel Brain and Mind Seminar Series will advance the visi
 on of Dr. William Feindel (1918–2014)\, Former Director of the Neuro (1972
 –1984)\, to constantly bridge the clinical and research realms. The talks 
 will highlight the latest advances and discoveries in neuropsychology\, co
 gnitive neuroscience\, and neuroimaging.\n\nSpeakers will include scientis
 ts from across The Neuro\, as well as colleagues and collaborators locally
  and from around the world. The series is intended to provide a virtual fo
 rum for scientists and trainees to continue to foster interdisciplinary ex
 changes on the mechanisms\, diagnosis and treatment of brain and cognitive
  disorders.\n\n\nRegister for In-Person\n\nTo watch online\, click here\n
 \nHost: Srirar Narayanan\n\n\nStop Acquiring Steady-State Event-Related fM
 RI!\n\nAbstract: Functional MRI (fMRI) studies typically discard the initi
 al volumes acquired during the approach of the magnetization to its steady
 -state value and acquire data in a continuous manner in this steady-state 
 condition. One can leverage the higher temporal signal-to-noise ratio (tSN
 R) of the initial volumes to increase the sensitivity of event-related fMR
 I experiments. To do this\, we have introduced Acquisition Free Periods (A
 FPs) that allow for the full recovery of the magnetization\, followed by a
 n acquisition block (AB) of fMRI volumes. An appropriately located/placed 
 stimulus in the AFP produces a Blood Oxygenation-Level-Dependent (BOLD) re
 sponse that peaks during the initial high tSNR phase of the AB. We can dem
 onstrate up to a ~50% reduction in the number of trials needed to achieve 
 a given statistical threshold relative to conventional event-related fMRI 
 using humans and marmosets. The silent AFP can be exploited for the presen
 tation of auditory stimuli or uncontaminated electrophysiological recordin
 g\, and its variable duration allows aperiodic acquisition or gating to EE
 G\, cardiac\, respiration or motion signals.\n\nRavi Menon\n\nProfessor of
  Medical Biophysics and Medical Imaging\, Western University\n\n\n\nRavi M
 enon is Professor of Medical Biophysics and Medical Imaging at Western Uni
 versity and Scientific Director of Western’s Centre for Functional and Met
 abolic Mapping (CFMM)\, Canada’s National ultra-high field MRI facility\, 
 which houses 3T and 7T human MRI scanners and 9.4T and 15.2T preclinical M
 RI systems. He is a Fellow of the Royal Society of Canada\, Canadian Acade
 my of Health Sciences and a Senior Fellow of the ISMRM. He sits on many ad
 visory boards\, including the Brain Canada Foundation and the Michael J. F
 ox Foundation for Parkinson’s Research. He has received over $170M in rese
 arch grants\, including a $66M CFREF which he Co-Directs\, as well as a re
 cent $24M New Frontiers in Research-Transformation award in neurodegenerat
 ion. His research involves the development of new structural and functiona
 l MRI methods to improve our understanding of the inception and progressio
 n of many brain disorders as well as the functioning of the healthy brain 
 through the lifespan.\n
DTSTART:20260126T180000Z
DTEND:20260126T190000Z
LOCATION:De Grandpré Communications Centre\, The Neuro
SUMMARY:Feindel Brain and Mind Seminar Series: Stop Acquiring Steady-State 
 Event-Related fMRI!
URL:/neuro/channels/event/feindel-brain-and-mind-semin
 ar-series-stop-acquiring-steady-state-event-related-fmri-369827
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