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 20 of 52 for “"Receptive field"”.
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Mechanisms of rapid receptive field reorganization in rat spinal cord
Rapid receptive field (RF) reorganization of somatosensory neurons in the rat dorsal horn was examined using extracellular single unit recording. Subcutaneous injection of lidocaine into RFs of dorsal horn neurons results in expansion of their RFs within minutes. The expanded RFs appear adjacent to …
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Receptive Field Characteristics of Some Thalamic Visual Nuclei of the Pigeon (Columba Livia)
Made available in DSpace on 2014-12-10T21:07:27Z (GMT). No. of bitstreams: 1 7219815.pdf: 4832360 bytes, checksum: b72723cb6720c812d935ef40c531562e (MD5) Previous issue date: 1972
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The Influence of Spatial Attention on Neuronal Receptive Field Structure within Macaque Area MT
Der Einfluss von räumlicher Aufmerksamkeit auf die Struktur rezeptiver Felder im superior-temporalen Kortex des RhesusaffenSelektive Aufmerksamkeit führt zu einer multiplikativen Verstärkung von Einzellzellaktivität im sensorischen Cortex. Modulation durch Aufmerksamkeit ist besonders ausgeprägt, …
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The role of serotonergic afferents in receptive field organization and response properties of cells in rat trigeminal subnucleus interpolaris
… somatotopic reorganization as well as changes in receptive field properties throughout the somatosensory neuraxis following damage to peripheral nerves. Chronic changes in receptive fields and response properties have also been reported in the trigeminal brainstem nuclear complex (TBNC) following …
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On the role of correspondence noise in human visual motion perception. A systematic study on the role of correspondence noise affecting Dmax and Dmin, using random dot kinematograms: A psychophysical and modelling approach.
… Here the roles of correspondence noise and receptive field geometry in limiting performance are investigated. The range of Dmax observed in the literature is consistent with the current information-limit based interpretation. Dmin is interpreted in the light of correspondence noise and …
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Processing of acoustic motion in the auditory cortex of the rufous horseshoe bat, Rhinolophus rouxi
… representation of acoustic motion in different fields of auditory cortex of the rufous horseshoe bat, Rhinolophus rouxi. Motion in horizontal direction (azimuth) was simulated using successive stimuli with dynamically changing interaural intensity differences presented via earphones. The …
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Mechanisms of Feedback in the Visual System
… a stimulus is presented outside of the classical receptive field along with a stimulus within the receptive field, the response is actually higher than the response to just a stimulus within the classical receptive field. Finally, we compared the responses of all of the simultaneously recorded …
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A wavelet-based CMAC for enhanced multidimensional learning
… is determined largely by the choice of the receptive field shape and the generalization parameter. This research contains a rigorous analysis of the rate of convergence with the standard CMAC, as well as the rate of convergence of networks using other receptive field shape. The effects of …
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A Hydrodynamic Sensory Antenna Used By Killifish for Nocturnal Hunting
… peak-to-peak. Each neuromast has a unique receptive field defined by its directional sensitivity to stimulation of the water surface. The receptive field is sharply modulated in angle, which cannot be explained either by changes in response to angle of the waves on the surface of the water …
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Principles underlying the development and organization of feature maps in the visual cortex
… organization of neurons with regard to their receptive field properties, and how is this organization established mechanistically? The visual cortex serves as a model area to address these questions, but whether general principles can explain the layouts of cortical maps, such as those of …
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Reducing false positives for object detection
… for classification and localization; (2) large receptive field for different scales leads to redundant context information for small objects; (3) multi-task learning helps, yet optimization of the multi-task loss may prove sub-optimal for individual tasks. We demonstrate the potential power of …
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Interlaminar Interactions in the Cat Visual Cortex (Laminae, Columns)
… that this projection may confer certain receptive field properties upon cells in the deep cortical layers. I have found that cells in layer 5 and 6 which remain active in the absence of supragranular layer activity retain their specificities for stimulus orientation, direction, and length.
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Some principles of somatosensory cortical organization in rats and humans
… cortical al organization at the level of the receptive field, cortical map, and cortical area in the rat and human. throughout these studies, a central focus was on the connection between each level of organization and the capacity for cortical reorganization. The rat and human somatoscnsory …
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Impact of Thalamocortical Synaptic Transmission on Input specific plasticity in Mouse Auditory Cortex
… specificity is demonstrated as the shift in the receptive field of cortical neurons towards the frequency of the acquired sound. Jafari and others showed that this frequency-specific receptive field shift of cortical neurons can be induced by focal electrical stimulation of the ventral division …
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Contrast Sensitivity to One- and Two-Dimensional Luminance Patterns
… explained in terms of an on-center, off-center receptive field model combined with watershed spatial vision behavior at spatial frequencies below 1 cycle-per-degree (cpd). The non-significant result for space-averaged luminance was explained by the limited range of manipulation of the variable. …
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A Descriptive Catalog of Dimming Cells in the Purple Shore Crab HEMIGRAPSUS NUDUS
… study was generated. The parameters measured the receptive field size; response to mechanoreceptive tactile stimuli; response to abrupt On or Off light level changes; response to object movement; and any changes in the dimming activity.</p> <p>The results indicate that <em>Hemigrapsus …
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Robust and reliable facial landmark detection under challenging conditions
… there are still many challenges in this field that render the robustness of corresponding algorithms fragile in real-world scenarios. In this research, we primarily focus on improving the robustness for facial landmark detection algorithms from three different aspects. We first improve …
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THE CRAYFISH VISUAL SYSTEM: INTRACELLULAR STUDIES AND MORPHOLOGIES OF IDENTIFIED INTERNEURONS
… or Medulla (where the SFs originate). Corneal receptive fields were determined and the SFs identified based on the previous work of Wiersma and Yamaguchi (1966). Following identification of each cell, the dendritic morphology was observed with lucifer yellow iontophoresis and subsequent …
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Expression of microbial rhodopsins in retinal neurons with subcellular targeting motifs: for the study of the structure/function of aii amacrine cells and for vision restoration
… center and a larger encompassing surround receptive field can be generated directly in a single RGC both morphologically and physiologically through the use of protein targeting motifs. Motif-targeting may be a promising approach in restoring center-surround antagonism in the RGC despite …
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