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May Distinguished Guest Speakers

4/27/2015

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On Friday, May 8th at noon, Dr. Shunan Zhang will be presenting in Conference Room A on the LIBR Campus. Dr. Zhang is visiting from the University of California, San Diego in the Department of Cognitive Science.

Title: Human decision making and experimental design on bandit problems. 

On Monday, May 11th at noon, Dr. Michael Browning will present in Conference Room A on the LIBR campus.

Dr. Browning is an academic psychiatrist based at the University of Oxford in the UK. His research uses computational neuroscience to better understand the etiology of anxiety and depression. This knowledge is used to guide the development of novel treatments.

Title: Anxious individuals have difficulty learning the causal statistics of aversive environments

All are welcome to attend lectures at LIBR. Please RSVP to Meg Purdue at mperdue@laureateinstitute.org

On Wednesday, May 20th at 10am, Mahlega Hassanpour will present in Conference Room A on the LIBR campus.

Mahlega Samira Hassanpour is a PhD candidate in Biophysics at Washington University in St. Louis.

Title: "Developing Diffuse Optical Tomography (DOT) towards Neuroimaging of Speech Perception in People with Cochlear Implants"

Description:

Cochlear implantation has helped many people worldwide with severe to profound sensorineural hearing loss to restore hearing ability. However, speech perception outcomes vary widely across both adults and children recipients.  Previous findings suggest that the major source of variance in performance post-implantation lies in the differences in the neuronal and cognitive processes that brains of individuals apply to the signal that implanted device sends to their auditory system. While neuroimaging can potentially reveal these differences, current techniques are limited either due to safety concerns brought by the contraindication with metal implant (fMIR) or radiation dose limit (PET), or because of poor image quality (EEG/MEG, fNIRS). In our lab, we are developing a new neuroimaging modality known as high-density diffuse optical tomography (HD-DOT). HD-DOT provides noninvasive and metal-compatible imaging and has excellent temporal resolution (relative to the hemodynamic response) and proven to have fMRI comparable spatial resolution (at cortical level). Prior to utilize this technique for imaging speech perception in cochlear implanted patients, we needed to develop tools for analyzing complex brain signals recorded by HD-DOT and evaluate the performance of our system in imaging different levels of speech perception in normal hearing subjects. This talk will cover three main topics: (a) brief introduction to HD-DOT, (b) new methods developed for signal processing and (c) approaches to assess HD-DOT’s performance in mapping speech network.

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