Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"lateral inhibition"”.
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Mach bands, Hermann grid, and lateral inhibition in the retina
… two illusions that are traditionally linked to lateral inhibitory processes in the retina is surveyed. Despite much research and a long history, the Mach bands illusion has not yet been very well-understood. Quantitative data is lacking, while qualitative data is controversial. The Hennann Grid …
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Functional Consequences and Mechanism of Lsd Action in the Lateral Eye of Limulus
… approach to explore the effects of LSD action on lateral inhibition in the lateral eye of Limulus. I recorded extracellular and intracellular responses from eccentric cells while producing inhibition via light and antidromic stimulation in the presence of 5-HT, LSD, chlorimipramine, and a bathing …
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Biologically inspired feature extraction for rotation and scale tolerant pattern analysis
… addressed in this dissertation is utilization of lateral inhibition and more generally, linear networks with recurrent connectivity along with complex-log conformal mapping in machine based implementations of information encoding, feature extraction and pattern recognition. The reasoning behind …
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The effect of conspecific support on the asymptotic properties of competing species
… pattern formation via local self-activation and lateral inhibition.
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Processing of quantitative information, investigated with fMRI.
… by use of single-cell recording, in the lateral intraparietal area (LIP) of the macaque monkey. In this thesis, we searched for evidence of number-sensitive coding in humans. Using a priming paradigm, we found behavioural evidence for a number-sensitive system in humans for small …
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EHBP1 and EHD2 Regulate Dll4 Caveolin-Mediated Endocytosis During Blood Vessel Development
… trailing stalk cells during vascular patterning. Lateral inhibition produced by Notch signaling is central to the specification and maintenance of tip and stalk cells in growing angiogenic sprouts. The Notch pathway is activated by the ligand Delta at adherens junctions between tip and stalk …
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THE ROLE OF NOTCH SIGNALING IN THE DIFFERENTIAL ABILITY OF SUPPORTING CELL SUBTYPES TO SPONTANEOUSLY REGENERATE HAIR CELLS IN THE NEONATAL MOUSE COCHLEA
… HCs or one of the SC subtypes by Notch-mediated lateral inhibition. In the neonatal mouse cochlea, many studies have shown that inhibition of Notch signaling allows SCs to convert into HCs in both normal undamaged cochleae, as well as in drug-damaged cochlear explants. This mechanism is also …
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The Dual Role of Notch Signaling During Motor Neuron Differentiation
… of progenitors for oligodendrocyte genesis via lateral inhibition. Activation or inactivation of Notch signaling during ESC to motor neuron differentiation is capable of disrupting lateral inhibition and generating homogenous cultures of either glial precursors or motor neurons. Interestingly, …
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Investigating the Role of Biological Constraints in Adversarial Robustness via Modeling and Representational Geometry
… which is based on divisive normalization and lateral inhibition, achieves better adversarial performance compared to traditional normalization methods such as batch normalization, which is based on standardization.
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Travelling waves modulated by resonant currents in laterally-inhibited grids of leaky integrate-and-fire neurons
… the dynamics of travelling waves, using a laterally inhibited spiking network of leaky integrate-and-fire neurons to link the single-neuron and network scales explicitly. Voltage-gated ion channels such as HCN channels that operate on a timescale slower than neural spikes enable a variety …
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Protein phosphorylation regulation in Arabidopsis
… during stomata development and patterning. A lateral inhibition model of stomatal cell fate coordination is proposed. As asymmetric division is correlated with multiple cell fate specifications in plants, understanding the molecular mechanism of asymmetric division in stomatal cell fate …
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Neural circuits for solving the cocktail party problem in mouse auditory cortex
… a computational model which proposed that lateral inhibition between spatially tuned channels within cortex is a key mechanism for spatial sound segregation. Cortical circuits are known to contain both excitatory cells and subpopulations of inhibitory interneurons, the roles of which can be …
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Imaging plasticity and structure of cortical maps in cat and mouse visual cortex
… with a shape and location reminiscent of lateral inhibition. This decrease of the intrinsic signal was shown to be correlated with a decrease in neuronal firing rate below baseline. Both studies were facilitated by the development of a signal analysis technique (part III), which improves …
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Coincidence detection in the cochlear nucleus : implications for the coding of pitch
… spiking mechanism, or other mechanisms such as lateral inhibition or spatial and temporal summation over spatially distributed inputs would provide insight into the neural mechanisms that give rise to the robust rate cues observed in some CN units.
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Analysis and Synthesis of the Dynamic Response of Retinal Neurons
… potential, and dynamic processes of self and lateral inhibition. An explicit expression for the spatiotemporal transfer function is obtained in terms of transfer functions for the generator potential, self-inhibitory, and lateral-inhibitory transductions, and spatial transforms of the lateral …
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New contributions in overcomplete image representations inspired from the functional architecture of the primary visual cortex = Nuevas contribuciones en representaciones sobrecompletas de imágenes inspiradas por la arquitectura funcional de la corteza visual primaria
… observed between V1 cells consisting in lateral inhibition and in facilitation between aligned cells are shown efficient for extracting edges of natural images. As a third point, the redundancy introduced by the overcompleteness is reduced by a dedicated sparse approximation algorithm …