Browsing Aysel Sabuncu Brain Research Center (BAM) by Title
Now showing items 193-212 of 213
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Temperature mapping via relaxation-based color MPI
(Infinite Science Publishing, 2020)In magnetic particle imaging (MPI), the relaxation behavior of the nanoparticles has been exploited to expand quantitative mapping capabilities of MPI to applications such as viscosity mapping and temperature mapping. We ... -
Temporal ventriloquism along the path of apparent motion: speed perception under different spatial grouping principles
(Springer Verlag, 2018)The coordination of intramodal perceptual grouping and crossmodal interactions plays a critical role in constructing coherent multisensory percepts. However, the basic principles underlying such coordinating mechanisms ... -
Tenascin-C derived signaling induces neuronal differentiation in a three-dimensional peptide nanofiber gel
(Royal Society of Chemistry, 2018)The development of new biomaterials mimicking the neuronal extracellular matrix (ECM) requires signals for the induction of neuronal differentiation and regeneration. In addition to the biological and chemical cues, the ... -
Tenascin-C mimetic peptide nanofibers direct stem cell differentiation to osteogenic lineage
(American Chemical Society, 2014)Extracellular matrix contains various signals for cell surface receptors that regulate cell fate through modulation of cellular activities such as proliferation and differentiation. Cues from extracellular matrix components ... -
Test-retest reliability of myelin imaging in the human spinal cord: Measurement errors versus region-and aging-induced variations
(Public Library of Science, 2018)Purpose To implement a statistical framework for assessing the precision of several quantitative MRI metrics sensitive to myelin in the human spinal cord: T1, Magnetization Transfer Ratio (MTR), saturation imposed by an ... -
Three-Dimensional Laminin Mimetic Peptide Nanofiber Gels for In Vitro Neural Differentiation
(Wiley-VCH Verlag, 2017)The extracellular matrix (ECM) provides biochemical signals and structural support for cells, and its functional imitation is a fundamental aspect of biomaterial design for regenerative medicine applications. The stimulation ... -
Trait anxiety and post-learning stress do not affect perceptual learning
(Elsevier, 2012)While it is well established that stress can modulate declarative learning, very few studies have investigated the influence of stress on non-declarative learning. Here, we studied the influence of post-learning stress, ... -
A transfer-learning approach for accelerated MRI using deep neural networks
(Wiley, 2020)Purpose: Neural networks have received recent interest for reconstruction of undersampled MR acquisitions. Ideally, network performance should be optimized by drawing the training and testing data from the same domain. In ... -
Twenty-fold acceleration of 3D projection reconstruction MPI
(De Gruyter, 2013)We experimentally demonstrate a 20-fold improvement in acquisition time in projection reconstruction (PR) magnetic particle imaging (MPI) relative to the state-of-the-art PR MPI imaging results. We achieve this acceleration ... -
Vector modulator based active compensation of direct feedthrough
(Infinite Science Publishing, 2020)In magnetic particle imaging (MPI), simultaneous excitation and signal acquisition leads to direct feedthrough problems. While this direct-feedthrough can be mitigated up to some extent with passive compensation, this may ... -
Vision: a systems neuroscience perspective
(Uskudar University, 2014)The visual system is the most studied part of the cortex, providing a basis for understanding not only visual processing per se but also the fundamental operations of the brain in general. Significant progress has been ... -
Visual crowding illustrates the inadequacy of local vs. global and feedforward vs. feedback distinctions in modeling visual perception
(Frontiers, 2014)Experimentaliststendtoclassifymodelsofvisualperceptionasbeingeitherlocalorglobal,andinvolvingeitherfeedforwardorfeedbackprocessing.Wearguethatthesedistinctionsarenotashelpfulastheymightappear,andweillustratetheseissuesby ... -
What crowding can tell us about object representations
(Association for Research in Vision and Ophthalmology Inc., 2016)In crowding, perception of a target usually deteriorates when flanking elements are presented next to the target. Surprisingly, adding further flankers can lead to a release from crowding. In previous work we showed that, ... -
What to choose next? a paradigm for testing human sequential decision making
(Frontiers Research Foundation, 2017)Many of the decisions we make in our everyday lives are sequential and entail sparse rewards. While sequential decision-making has been extensively investigated in theory (e.g., by reinforcement learning models) there is ... -
The whole warps the sum of its parts: gestalt-defined-group mean size biases memory for individual objects
(SAGE Publications Inc., 2017)The efficiency of averaging properties of sets without encoding redundant details is analogous to gestalt proposals that perception is parsimoniously organized as a function of recurrent order in the world. This similarity ... -
Why vision is not both hierarchical and feedforward
(Frontiers, 2014)In classical models of object recognition, first, basic features (e.g., edges and lines) are analyzed by independent filters that mimic the receptive field profiles of V1 neurons. In a feedforward fashion, the outputs of ... -
X‐Space MPI: magnetic nanoparticles for safe medical imaging
(Wiley, 2012)One quarter of all iodinated contrast X‐ray clinical imaging studies are now performed on Chronic Kidney Disease (CKD) patients. Unfortunately, the iodine contrast agent used in X‐ray is often toxic to CKD patients’ weak ... -
Zebrafish aging models and possible interventions
(InTechOpen Press, 2018)Across the world, the aging population is expanding due to an increasing average life expectancy. The percentage of elderly over the age of 65 is expected to be more than 15% of the total world population by 2025. As the ... -
Zebrafish brain RNA sequencing reveals that cell adhesion molecules are critical in brain aging
(Elsevier, 2020)Brain aging is a complex process, which involves multiple pathways including various components from cellular to molecular. This study aimed to investigate the gene expression changes in zebrafish brains through young-adult ... -
Zebrafish-A model organism for studying the neurobiological mechanisms underlying cognitive brain aging and use of potential interventions
(Frontiers Media S.A., 2018)Classically, the zebrafish model organism has been used to elucidate the genetic and cellular mechanisms related to development since the embryo forms and grows externally following fertilization. This provides insight ...
