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Showing 1 to 17 of 17 for “"optic tectum"”.
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Electrophysiology of Goldfish Optic Tectum
Made available in DSpace on 2014-12-11T22:22:14Z (GMT). No. of bitstreams: 1 7207021.pdf: 8261318 bytes, checksum: 68a2867a6feba44bd71b0635a8b92a16 (MD5) Previous issue date: 1971
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Inhibition in the Frog Optic Tectum
Made available in DSpace on 2014-12-09T18:53:07Z (GMT). No. of bitstreams: 1 7013504.pdf: 3743279 bytes, checksum: 50959a6eb676a9ac4d199087c38df777 (MD5) Previous issue date: 1969
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Analysis of Zebrafish Optic Tectum Visual Processing Before and After Optic Nerve Crush
… the retina, which then sends information to the optic tectum, the first visual brain center in lower vertebrates, for further processing. There were two main goals of this study. The first goal was to obtain tectal evoked responses (TER) from adult zebrafish and to compare them to previous …
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Spectral Sensitivity of the Goldfish ERG and Optic Tectum Before and After Optic Nerve Damage
… determine the return of function of the goldfish optic nerve at four time intervals after damage (crush). An increment threshold procedure was used to obtain electroretinogram (ERG) and tectal responses to light onset and termination to various wavelengths of light. Spectral sensitivity functions …
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Studies on the mode of CRF action in the optic tectum of the African Clawed Frog, Xenopus laevis
… response. Previous work in our lab showed that optic tectum (OT), the homolog of superior colliculus in non-mammalian vertebrates, contributes to decision making on predator avoidance/prey capture tradeoffs. The neuropeptide corticotropin releasing factor (CRF) modulates discrete aspects of prey …
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The mechanical regulation of Eph/ephrin signalling in the developing Xenopus brain
… targets in the visual area of the brain, the optic tectum. However, despite immense progress in our understanding of Eph/ephrin signalling in neural development, discrepancies between in vitro and in vivo work remain. As axon pathfinding is regulated by chemical and mechanical signals, and the …
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Mechanisms of Feedback in the Visual System
… providing direct topographic feedback to the optic tectum, a nucleus that receives the vast majority of retinal output. The optic tectum and nucleus isthmi of the amphibian are homologous structures to the superior colliculus and parabigeminal nucleus in mammals, respectively. We formulated a …
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Characterizing complex time-series from the scaling of prediction error
… model chaotic system and physical data from the optic tectum of an attentive pigeon exhibiting the important phenomena of nonstationary neuronal oscillations in response to visual stimuli.
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Information processing in a midbrain visual pathway
… We investigated a midbrain visual pathway: optic tectum and its isthmic nucleus) that is motion sensitive and is thought as part of attentional system. We determined the physiological properties of individual neurons as well as their synaptic connections with intracellular recordings. We …
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Imagining the Voltage of Neurons Distributed Across Entire Brains of Larval Zebrafish
… which mapped onto locations throughout the optic tectum, as well as during stimulus-independent bursts, which mapped onto locations in the cerebellum and medulla. Whole-brain voltage imaging may open up frontiers in the fundamental operation of neural systems.
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A data acquisition and analysis system for use with multi-electrode arrays in the development of a retinal prosthesis for degenerative retinal diseases
… system has also been used to record from the optic tectum of thefrog, paving the way for future studies involving measuring the effects of retinal stimulation on the brain. Finally, in parallel with electrode array studies, a prototype complementary metal-oxide-semiconductor (CMOS) chip has …
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VISUAL RECOGNITION OF THE STATIONARY ENVIRONMENT IN LEOPARD FROGS
… meaningful aspects of their environment. The optic tectum has been shown to mediate the frog's ability to recognize and respond to moving prey and looming objects. Nonetheless, atectal frogs are still able to appropriately respond to non-moving aspects of their environment. There appears to be …
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The Mechanisms And Roles Of Feedback Loops For Visual Processing
… The isthmotectal feedback loop consists of the optic tectum: OT) and three nucleus isthmi: Imc, Ipc and SLu. The tectal layer 10 neurons project to ipsilateral Imc, Ipc and SLu in a topographic way. In turn Ipc and SLu send back topographical: local) cholinergic terminals to the OT, whereas Imc …
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Sources and Targets of Trophic Factors in the Avian Locus Coeruleus and Oculomotor System
… the locus coeruleus (LoC) through a relay in the optic tectum. This is a wiring transmission example. NGF can also travel from the retina to the LoC through cerebrospinal fluid circulation, which is a volume transmission example.The developing chicken oculomotor system was chosen to explore the …
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Interplay between Piezo1-mediated mechanosensing and the chemical guidance cue Semaphorin3A during development of the embryonic nervous system
… project, I used the embryonic Xenopus laevis optic pathway as a model to study how axons navigate so precisely to their destination. Here, retinal ganglion cells (RGCs) send their axons out of the retina, to cross with axons of the opposite eye in the optic chiasm and continue their journey …
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Axonal Transport of Glycoproteins and Glycolipids in the Goldfish Optic System
… ganglion cells can be studied as it moves in the optic nerve and optic tract to the optic tectum, where the optic fibers terminate. For instance, when labeled amino acids are injected into the goldfish eye, labeled proteins synthesized in the retinal ganglion cells are axonally transported in the …
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The role of tissue viscoelasticity in axon guidance during Xenopus brain development
… retinal ganglion cell axons grow along the optic pathway toward the optic tectum. On their way through the mid-diencephalon, they turn caudally in response to gradients of the chemical guidance cues Semaphorin3A, Slit 1 and Slit 2 as well as tissue elasticity. However, while the importance …