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 34 for “"inferior colliculus"”.
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Modularity of the microcircuitry of the lateral cortex of the mouse inferior colliculus
The inferior colliculus, or auditory midbrain, lies at the center of the auditory pathway and serves as a site of convergence and integration of acoustic information. In addition to its well-established functional role in processing sound information, one sub-region of the inferior colliculus, …
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"""White Noise"" Non-Linear Analysis of Inferior Colliculus Neural Responses in the Little Brown Bat, Myotis Lucifugus"
… activity was recorded from 82 neurons in the inferior colliculus (IC). The power of the techniques is evident from their ability to reveal many different characteristics of the neurons' responses simultaneously. It was found that basic response properties such as latency, threshold, and …
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Modulation of cochlear afferent response by the lateral olivocochlear system : activation via electrical stimulation of the inferior colliculus
… stimulating electrodes were placed in the inferior colliculus (IC) to activate the LOC system indirectly, while recording cochlear responses bilaterally from anesthetized guinea pigs. Neural potentials and outer hair cell based potentials were recorded before and after IC stimulation for …
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The Neuronal Basis of Signal Detection in the Presence of Spatially Separated Noise: A Study in the Frog Inferior Colliculus
… were made from single auditory units in the inferior colliculus (IC), while the frog was subject to free-field stimulation with sinusoidally amplitude modulated tone bursts (signal) in the presence of spatially separated broad-band noise (masker). Results of the study showed that while many …
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Auditory Neurons in the Dorsal Cortex of the Inferior Colliculus: Responses to Contralateral Tone Bursts and Modulations by the Auditory Cortex
The inferior colliculus plays a key role in auditory processing. In the current study I used the albino rat, Rattus norvegicus, as an animal model to investigate auditory responses in single neurons in the dorsomedial subdivision of the inferior colliculus (ICd). My results reveal that ICd neurons …
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Stimulus Integration and Parsing in the Primate Auditory Midbrain
… examines how electrical stimulation of the inferior colliculus influences perception of sounds in a nonhuman primate. The central nucleus of the inferior colliculus is the major ascending relay of auditory information before it reaches the forebrain, and thus an ideal target for …
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Invasive and Noninvasive Brain Stimulation Strategies for the Treatment of Tinnitus
… centers, particularly the central nucleus of the inferior colliculus, exhibit a precise spatial organization based on frequency coding, supporting the role of the corticofugal system for modulating specific and relevant coding features within the ascending auditory system. Further, by combining …
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Response properties of neighboring neurons in the auditory midbrain
The inferior colliculus, the primary nucleus in the mammalian auditory midbrain, occupies a central position in the ascending auditory pathway. Nearly all ascending neural pathways converge and synapse in the central nucleus of the inferior colliculus (ICC). Further, the anatomical arrangement of …
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Anatomical and physiological properties of the superior paraolivary nucleus in the rat
… and SPON axons target primarily the ipsilateral inferior colliculus. However, little is known regarding the neurochemical phenotypes present in the SPON and how these neurons respond to auditory stimuli. Understanding the neurochemical and physiological properties of the constituent neurons will …
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Effects of sound direction on spectral and temporal processing in the frog midbrain
… extracellular recording from the frog inferior colliculus (IC). The neural activities were evaluated from 3 to 5 sound directions within 180$\sp\circ$ of frontal field in the free-field stimulus system. The results from this study provide physiological evidence that sound direction can …
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Automatic voice disorder recognition using acoustic amplitude modulation features
… at the level of the cochlea, auditory nerve, and inferior colliculus. Recognition experiments using dysphonic sentence data obtained from the Kay Elemetrics Disordered Voice Database suggest that our system provides complementary information to state-of-the-art mel-cepstral features. A model for …
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Binaural interactions in the auditory midbrain with bilateral electric stimulation of the cochlea
… implants. Single neuron responses in the inferior colliculus (IC), the main nucleus of the auditory midbrain, were studied using electric stimulation of bilaterally implanted intracochlear electrode arrays. Neural tuning to interaural timing difference (ITD) was emphasized since it is an …
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Effects of cardiac gating on fMRI of the human auditory system
… and increased the magnitude of activation in the inferior colliculus (p < 0.01) and medial geniculate body (p < 0.1).
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Protein and viral partitioning in two-phase aqueous micellar systems
… contrast, there was little change in brainstem (inferior colliculus, dorsal and anteroventral cochlear nucleus) labeling. Second, the effect of past sound exposure on brain response to sound was examined. After daily exposure to a sound, labeling evoked by that sound was markedly decreased in …
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Neural correlates of pitch and roughness : toward the neural code for melody and harmony
… pitch exists in ISIs of neurons in the inferior colliculus, the principal auditory nucleus of the midbrain. Results also reveal greater degradation of pitch representation at the midbrain compared to the periphery.
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Sound temporal envelope and time-patterns of activity in the human auditory pathway : an fMRI study
… of subcortical activity is not. In the inferior colliculus, activity to prolonged noise burst trains (30 s) increased with increasing rate (2/s - 35/s), but was always sustained throughout the train. In contrast, the most striking sound rate dependence of auditory cortex was seen in the …
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Signal detection in the auditory midbrain : neural correlated and mechanisms of spatial release from masking
… from low-frequency, ITD-sensitive neurons in the inferior colliculus (IC), a major center of converging auditory pathways in the midbrain. We develop a computational model of the neuron responses, which incorporates both interaural cross-correlation (as used in existing binaural models) and …
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Auditory pathway responses to parametrized vowels in autism spectrum disorders
… vowel stimuli. These regions were the Inferior Colliculus, the Left Thalamus, the left Posterior Insula, the Auditory Cortex, Wernicke's area, and Broca's area. The stimuli were parametrized so as to target different signal processing capabilities associated with each region. They were …
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Neural coding of sound envelope in reverberant environments
… envelope, we recorded from single units in the inferior colliculus (IC) of unanesthetized rabbit using sinusoidally amplitude modulated broadband noise stimuli presented in simulated anechoic and reverberant environments. Consistent with the attenuation of amplitude modulation (AM) in the …
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