Neuronal Correlates of Perception, Imagery, and Memory for Familiar Tunes

We used fMRI to investigate the neuronal correlates of encoding and recognizing heard and imagined melodies. Ten participants were shown lyrics of familiar verbal tunes; they either heard the tune along with the lyrics, or they had to imagine it. In a subsequent surprise recognition test, they had to identify the titles of tunes that they had heard or imagined earlier. The functional data showed substantial overlap during melody perception and imagery, including secondary auditory areas. During imagery compared with perception, an extended network including pFC, SMA, intraparietal sulcus, and cerebellum showed increased activity, in line with the increased processing demands of imagery. Functional connectivity of anterior right temporal cortex with frontal areas was increased during imagery compared with perception, indicating that these areas form an imagery-related network. Activity in right superior temporal gyrus and pFC was correlated with the subjective rating of imagery vividness. Similar to the encoding phase, the recognition task recruited overlapping areas, including inferior frontal cortex associated with memory retrieval, as well as left middle temporal gyrus. The results present new evidence for the cortical network underlying goal-directed auditory imagery, with a prominent role of the right pFC both for the subjective impression of imagery vividness and for on-line mental monitoring of imagery-related activity in auditory areas

The Effects of Musical Expertise on Sensory Processing

The goal of this thesis was to assess sensorimotor musical experience and its impact on the way that individuals perceive and interact with real-world musical stimuli. Experiment #1 investigated multisensory integration in 14 musicians and 10 non-musicians using a two alternative forced-choice (2AFC) discrimination task, and was designed to examine whether musical expertise augmented multisensory enhancement. Musical experience did not alter the outcomes of multisensory integration, but there may be asymmetries between musicians and non-musicians in their use of auditory cues. Experiment #2 was a neuroimaging case study investigating the influence of musical familiarity on the kinesthetic motor imagery of dance accompanied by music in expert dancers. Familiarity resulted in increased hemodynamic responses in the supplementary motor area (SMA) and decreased responses in Heschls gyrus (HG). These findings provide new evidence regarding the influence of musical expertise on sensory processing using real-world complex stimuli. This thesis suggests that expert practice shapes the way experts perceive and interact with their environments, and emphasizes the need for, and challenges of using naturalistic stimuli

Everything You Wanted to Know About MPEG-7: Part 1

Part I of this article provides an overview of the development, functionality, and applicability of MPEG-7. We ll first present the role of MPEG-7 within the context of past MPEG standards. We then outline ideas of what should be possible using MPEG-7 technology. In Part II, we ll discuss the description of MPEG-7 s concepts, terminology, and requirements. We ll then compare MPEG-7 to other approaches on multimedia content description

Gender Identity Work: Oppression and Agency as Described in Lifespan Narratives of Transgender and Other Gender Non-Conforming Identified People in the U. S.

The purpose of this research was to critically examine the gender identity work of white transgender and other gender non-conforming identified (TgNCi) people through their stories and the meanings they attach to important artifacts across the lifespan. A single question directed the investigation: How do TgNCi individuals describe gender identity work through lifespan narratives? Thirteen volunteers participated in two interviews: the first, a narration of their life stories and in the second, descriptions of the significance of personal artifacts selected by the participants and photographed by the investigator. Participants’ ages ranged from 22 to 66, according to four pre-determined age ranges of the study design. This allowed for investigation within each age group, and also across all age groups. Qualitative analyses were conducted in three layers: (1) content analysis, (2) Critical Discourse Analysis, and (3) multimodal analysis. Content analysis identified three primary categories describing gender identity work: (1) oppression (from outside), (2) suppression (of preferred gender expression), and (3) the desire for visibility (longing to be recognized by others, and to see the self, as Who-I-Am). Critical Discourse Analysis revealed that in response to violent oppression, participants interrupted their natural agentic actions, speech, and thought processes. The term Interrupted Agency was coined to convey these strategic responses of hiding and secrecy. Multimodal analysis of participants\u27 expressed relationships with material objects exposed three primary functions of the artifacts: (1) tools of visibility, (2) messengers, and (3) laminations. The closing discussion features the researcher’s meaning making of this gender identity work and addresses future study and research

Neural Underpinnings of Walking Under Cognitive and Sensory Load: A Mobile Brain/Body Imaging Approach

Dual-task walking studies, in which individuals engage in an attentionally-demanding task while walking, have provided indirect evidence via behavioral and biomechanical measures, of the recruitment of higher-level cortical resources during gait. Additionally, recent EEG and imaging (PET, fNIRS) studies have revealed direct neurophysiological evidence of cortical contributions to steady-state walking. However, there remains a lack of knowledge regarding the underlying neural mechanisms involved in the allocation of cortical resources while walking under increased load. This dissertation presents three experiments designed to provide a greater understanding of the cortical dynamics implicated in processing load (top-down or bottom-up) during locomotion. Furthermore, we seek to investigate age-related differences in these neural pathways. These studies were conducted using an innovative EEG-based Mobile Brain/Body Imaging (MoBI) approach, combining high-density EEG, foot force sensors and 3D body motion capture as participants walked on a treadmill. The first study employed a Go/No-Go response inhibition task to evaluate the long-term test-retest reliability of two cognitively-evoked event-related potentials (ERPs), the earlier N2 and the later P3. Acceptable levels of reliability were found, according to the intraclass correlation coefficient (ICC), and these were similar across sitting and walking conditions. Results indicate that electrocortical signals obtained during walking are stable indices of neurophysiological function. The aim of the second study was to characterize age-related changes in gait and in the allocation of cognitive control under single vs. dual-task load. For young adults, we observed significant modulations as a result of increased task load for both gait (longer stride time) and for ERPs (decreased N2 amplitude and P3 latency). In contrast, older adults exhibited costs in the cognitive domain (reduced accuracy performance), engaged in a more stereotyped pattern of walking, and showed a general lack of ERP modulation while walking under increased load, all of which may indicate reduced flexibility in resource allocation across tasks. Finally, the third study assessed the effects of sensory (optic flow and visual perturbations) and cognitive load (Go/No-Go task) manipulations on gait and cortical neuro-oscillatory activity in young adults. While walking under increased load, participants adopted a more conservative pattern of gait by taking shorter and wider strides, with cognitive load in particular associated with reduced motor variability. Using an Independent Component Analysis (ICA) and dipole-fitting approach, neuro-oscillatory activity was then calculated from eight source-localized clusters of Independent Components (ICs). Significant modulations in average spectral power in the theta (3-7Hz), alpha (8-12Hz), beta (13-30Hz), and gamma (31-45Hz) frequency bands were observed over occipital, parietal and frontal clusters of ICs, as a function of optic flow and task load. Overall, our findings demonstrate the reliability and feasibility of the MoBI approach to assess electrocortical activity in dual-task walking situations, and may be especially relevant to older adults who are less able to flexibly adjust to ongoing cognitive and sensory demands while walking

Fostering Connections, Empowering Communities, Celebrating the World

Selected Papers from the 2016 Central States Conference on the Teaching of Foreign Languages Editor: Aleidine Moeller, University of Nebraska-Lincoln 1. Analyzing Song Lyrics as an Authentic Language Learning Opportunity — Georgia Coats 2. Prose Combat: Contemporary Target Language Songs as Authentic Text — Kirsten Halling & Pascale Abadie 3. Enhancing the Use of Music in Language Learning through Technology — Nick Ziegler 4. The Case for Integrating Dance in the Language Classroom — Angela N. Gardner 5. Digital Language Learning: Bringing Community to the Classroom — Leah McKeeman & Blanca Oviedo 6. Digital Storytelling in the Foreign Language Classroom — Martha E. Castañeda & Nohelia Rojas-Miesse 7. Collaborative Online International Learning: Students and Professors Making Global Connections — Diane Ceo-DiFrancesco & Delane Bender-Slack 8. In Search of Defining “Best Practice:” A K–16 Connection — Susan M. Knight 9. Challenges and Triumphs of Co-Teaching in the World Language Classroom — Katrina M. Reinhardt & Rose Q. Egan 10. Developing World Language Students’ Proficiency with Reader’s Workshops and Extensive Reading During Literature Circles— Brigid M. Burke 11. Fostering Connections: Using Memorials to Teach History in Study Abroad —.Susanne Wagner 12. Analyzing Interpretive Communication in the AP German Culture and Language — Cori Crane 286 pp

High-Density Diffuse Optical Tomography During Passive Movie Viewing: A Platform for Naturalistic Functional Brain Mapping

Human neuroimaging techniques enable researchers and clinicians to non-invasively study brain function across the lifespan in both healthy and clinical populations. However, functional brain imaging methods such as functional magnetic resonance imaging (fMRI) are expensive, resource-intensive, and require dedicated facilities, making these powerful imaging tools generally unavailable for assessing brain function in settings demanding open, unconstrained, and portable neuroimaging assessments. Tools such as functional near-infrared spectroscopy (fNIRS) afford greater portability and wearability, but at the expense of cortical field-of-view and spatial resolution. High-Density Diffuse Optical Tomography (HD-DOT) is an optical neuroimaging modality directly addresses the image quality limitations associated with traditional fNIRS techniques through densely overlapping optical measurements. This thesis aims to establish the feasibility of using HD-DOT in a novel application demanding exceptional portability and flexibility: mapping disrupted cortical activity in chronically malnourished children. I first motivate the need for dense optical measurements of brain tissue to achieve fMRI-comparable localization of brain function (Chapter 2). Then, I present imaging work completed in Cali, Colombia, where a cohort of chronically malnourished children were imaged using a custom HD-DOT instrument to establish feasibility of performing field-based neuroimaging in this population (Chapter 3). Finally, in order to meet the need for age appropriate imaging paradigms in this population, I develop passive movie viewing paradigms for use in optical neuroimaging, a flexible and rich stimulation paradigm that is suitable for both adults and children (Chapter 4)

DEVELOPMENT OF NOVEL EEG-BASED METHODOLOGY FOR INVESTIGATION OF NEURAL CORRELATES OF HUMAN DECEPTION

Ph.DDOCTOR OF PHILOSOPH

Proceedings of the 7th Sound and Music Computing Conference

Proceedings of the SMC2010 - 7th Sound and Music Computing Conference, July 21st - July 24th 2010