Happening @ Michigan https://events.umich.edu/list/rss RSS Feed for Happening @ Michigan Events at the University of Michigan. Functional MRI 2020-21 Symposium Speaker (October 13, 2020 4:00pm) https://events.umich.edu/event/77364 77364-19846044@events.umich.edu Event Begins: Tuesday, October 13, 2020 4:00pm
Location: Off Campus Location
Organized By: Functional MRI Lab

Abstract: MRI is an incredibly powerful medical imaging modality, but it is notorious for low signal levels, poor spatial resolution, and long scan times. In this talk, we will explore how concepts from Magnetic Resonance Fingerprinting can be leveraged to overcome the conventional limitations of MRI.

For Zoom registration details please email Theresa Russ, truss@umich.edu.

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Lecture / Discussion Tue, 29 Sep 2020 17:34:12 -0400 2020-10-13T16:00:00-04:00 2020-10-13T17:30:00-04:00 Off Campus Location Functional MRI Lab Lecture / Discussion Seiberlich photo
Functional MRI 2020-21 Symposium Speaker (November 10, 2020 4:00pm) https://events.umich.edu/event/78658 78658-20097568@events.umich.edu Event Begins: Tuesday, November 10, 2020 4:00pm
Location: Off Campus Location
Organized By: Functional MRI Lab

Abstract: Demanding cognitive functions like working memory (WM) depend on functional brain networks being able to communicate efficiently while also maintaining some degree of modularity. Evidence suggests that aging can disrupt this balance between integration and modularity. In this study, we examined how cognitive training affects the integration and modularity of functional networks in older and younger adults. 23 younger and 23 older adults participated in 10 days of verbal WM training, leading to performance gains in both age groups. Older adults exhibited lower modularity overall and a greater decrement when switching from rest to task, compared to younger adults. Interestingly, younger but not older adults showed increased task-related modularity with training. Furthermore, whereas training increased efficiency within, and decreased participation of, the default-mode network for younger adults, it enhanced efficiency within a task-specific salience/sensorimotor network for older adults. Finally, training increased segregation of the default-mode from fronto-parietal/salience and visual networks in younger adults, while it diffusely increased between-network connectivity in older adults. Thus, while younger adults increase network segregation with training, suggesting more automated processing, older adults persist in, and potentially amplify, a more integrated and costly global workspace, suggesting different age-related trajectories in functional network reorganization with WM training.

Register in advance for this meeting:
https://umich.zoom.us/meeting/register/tJUtf-CurzkoHdXHlCPN2gO3UetH2ba4M0wo

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Lecture / Discussion Mon, 19 Oct 2020 11:35:15 -0400 2020-11-10T16:00:00-05:00 2020-11-10T17:30:00-05:00 Off Campus Location Functional MRI Lab Lecture / Discussion Alex Iordan
Functional MRI 2020-21 Symposium Speaker (December 1, 2020 4:00pm) https://events.umich.edu/event/79417 79417-20317946@events.umich.edu Event Begins: Tuesday, December 1, 2020 4:00pm
Location: Off Campus Location
Organized By: Functional MRI Lab

Abstract: The neural basis of consciousness is one of the most challenging and fundamental questions in science. Evidence from noninvasive functional neuroimaging studies has pointed to two distinct cortical systems that may mediate the ongoing stream of human consciousness, an internally directed system – default mode network (DMN) and an externally directed system – dorsal attention network (DAT). During Dr. Huang’s talk, he will present one of his recently published studies (Huang et al., 2020, Science Advances) entitled “Temporal Circuit of Macroscale Dynamic Brain Activity Supports Human Consciousness”. In this work, he and his colleagues examined how the two systems are regulated in the conscious brain, and how they are disrupted when consciousness is diminished. They developed a concept, the “temporal circuit”, characterized by a set of trajectories along which the dynamic brain activity occurs. The transitions between the DMN and DAT are embedded in the temporal circuit, where a balanced reciprocal accessibility of brain states is characteristic of consciousness. In contrast, an isolation of the DMN and DAT from the temporal circuit underlies unconsciousness of diverse etiologies. These findings provide new mechanistic understanding on the functional role of anti-correlated systems and consciousness. Next, Dr. Huang will discuss some ongoing and extended work on determining which brain region plays a key role in controlling the DMN-DAT transitions and in gating conscious access (i.e., the availability of consciously perceived information to cognitive processors).

Register in advance for this meeting:
https://umich.zoom.us/meeting/register/tJIpce6gpzkrHtaY3Xhz3Jk7xeL-VMyPjdnA

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Lecture / Discussion Mon, 16 Nov 2020 15:25:20 -0500 2020-12-01T16:00:00-05:00 2020-12-01T17:30:00-05:00 Off Campus Location Functional MRI Lab Lecture / Discussion Huang photo
Functional MRI 2020-21 Symposium Speaker - Zhongming Liu, Ph.D. (February 23, 2021 4:00pm) https://events.umich.edu/event/80889 80889-20816997@events.umich.edu Event Begins: Tuesday, February 23, 2021 4:00pm
Location: Off Campus Location
Organized By: Functional MRI Lab

Abstract: Neuroscience can inspire AI. AI can help study the brain. In this talk, I will present our recent progress in bridging neuroscience and AI by using images of brain activity. I will share some examples of using AI to model and decode brain activity during resting state, natural vision, hearing, and language comprehension, as well as emerging ideas in brain-inspired models for computer vision and natural language processing.

Register in advance for this meeting: https://umich.zoom.us/meeting/register/tJ0pf-GhrT4qG9KzwgvflFiT7nolYE1HMYvE

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Lecture / Discussion Mon, 25 Jan 2021 12:12:21 -0500 2021-02-23T16:00:00-05:00 2021-02-23T17:30:00-05:00 Off Campus Location Functional MRI Lab Lecture / Discussion Liu photo
Functional MRI 2020-21 Symposium Speaker - Alexander Weigard, Ph.D. (March 30, 2021 4:00pm) https://events.umich.edu/event/82938 82938-21225235@events.umich.edu Event Begins: Tuesday, March 30, 2021 4:00pm
Location: Off Campus Location
Organized By: Functional MRI Lab

Abstract: The Group Iterative Multiple Model Estimation (GIMME) framework has emerged as a promising method for characterizing connections between brain regions in functional neuroimaging data. Two of the most appealing features of this framework are its ability to estimate the directionality of connections between network nodes and its ability to determine whether those connections apply to everyone in a sample (group-level) or just to one person (individual-level). However, there are outstanding questions about the validity and stability of these estimates, including: 1) how recovery of connection directionality is affected by features of data sets such as scan length and autoregressive effects, which may be strong in some imaging modalities (resting state fMRI, fNIRS) but weaker in others (task fMRI); and 2) whether inferences about directionality at the group and individual levels are stable across time. This talk will provide an overview of the GIMME framework and describe relevant results from a largescale simulation study that assesses directionality recovery under various conditions and a separate project that investigates the temporal stability of GIMME’s inferences in the Human Connectome Project data set. Analyses from these projects demonstrate that estimates of directionality are most precise when autoregressive and cross-lagged relations in the data are relatively strong, and that inferences about the directionality of group-level connections, specifically, appear to be stable across time. Implications of these findings for the interpretation of directional connectivity estimates in different types of neuroimaging data will be discussed.

Register in advance for this meeting:
https://umich.zoom.us/meeting/register/tJwoceGtrz8pHtK1iOVRbvfJz6vx2rMaa-gU

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Lecture / Discussion Thu, 11 Mar 2021 11:36:07 -0500 2021-03-30T16:00:00-04:00 2021-03-30T17:30:00-04:00 Off Campus Location Functional MRI Lab Lecture / Discussion Alexander Weigard, Ph.D.
Functional MRI 2020-21 Symposium Speaker - Andrew Jahn, Ph.D. (April 6, 2021 4:00pm) https://events.umich.edu/event/79749 79749-21201312@events.umich.edu Event Begins: Tuesday, April 6, 2021 4:00pm
Location: Off Campus Location
Organized By: Functional MRI Lab

Abstract: Over the past decade, many new methods for preprocessing neuroimaging data have been developed. With so many options to choose from, researchers can be bewildered by the different combinations of parameters for steps such as slice-timing correction, coregistration, and normalization. In response to this, standardized preprocessing pipelines such as fMRIPrep have been developed to give researchers an optimized preprocessing pipeline drawing from many different software packages such as AFNI, FSL, and ANTs. The output can then be used with any neuroimaging software for further analysis. In this talk we will review how BIDS, a standardized format for organizing neuroimaging data, enables the use of software such as fMRIPrep, and allows for easier sharing on sites such as OpenNeuro. We will have a practical demonstration of how to organize data into BIDS format, and how to interpret the output from the fMRIPrep pipeline.

The format of this workshop will be a lecture followed by a hands-on tutorial of looking at a typical BIDS subject and the output from fMRIPrep. Those who wish to follow along with the practical part of the seminar should have access to a command line (e.g., the Terminal that comes with a typical Macintosh operating system, or Cygwin on Windows), and an image viewer, such as FSL's fsleyes or AFNI's image viewer.

Register in advance for this meeting:
https://umich.zoom.us/meeting/register/tJIvc-2hpzMjHdZTYYKyy1ANt6zrLGW16tjO

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Lecture / Discussion Mon, 08 Mar 2021 10:49:58 -0500 2021-04-06T16:00:00-04:00 2021-04-06T17:30:00-04:00 Off Campus Location Functional MRI Lab Lecture / Discussion Jahn photo