Visual Pathway
Visual Pathway - Related Videos
01:22
Photoreceptors and Visual Pathways
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2025
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
04:18
Visualization and Mapping of Neuronal Pathways in an Amygdala Brain Slice
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2025
This video demonstrates a procedure for analyzing synaptic connectivity between medial prefrontal cortex (mPFC) and amygdala neurons using acute amygdala brain slices from mice. The mPFC neurons in these mice express channelrhodopsin fused to a fluorescent protein. The channelrhodopsins facilitate ion influx and action potential generation in the mPFC neurons upon light activation. Consequently, mPFC neurons release neurotransmitters that bind to postsynaptic amygdala neurons, triggering...
03:44
Preparing a Rat Model to Assess Visual Pathway Integrity Using an Electrophysiology Setup
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2025
This video demonstrates the preparation of a rat model to study retinal health and visual pathway integrity. Visual evoked potential and electroretinography reference and active electrodes are connected to the rat, followed by aligning the platform with the rat in front of the Ganzfeld bowl for even retinal illumination and closing the Faraday cage to avoid external interference.
13:26
Measuring Connectivity in the Primary Visual Pathway in Human Albinism Using Diffusion Tensor Imaging and Tractography
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Cited by 5 •
2016
This manuscript describes deterministic and probabilistic algorithms for white matter (WM) reconstruction, used to examine differences in optic radiation (OR) connectivity between albinism and controls. Although probabilistic tractography follows the true course of nerve fibers more closely, deterministic tractography was run to compare the reliability and reproducibility of both techniques.
10:05
DTI of the Visual Pathway - White Matter Tracts and Cerebral Lesions
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Cited by 13 •
2014
Diffusion tensor imaging (DTI) was performed to try to depict the major parts of the visual pathway. The goal was to use an FDA approved standard commercial workstation which could be used for everyday routine in order to try to reduce postoperative damage of the visual pathway in the patients.
FAQs
Partial crossing at the optic chiasm changes how signals from the two eyes are distributed toward the brain. This arrangement creates an organized route through the optic tracts rather than sending every retinal signal along an entirely separate path. Because the crossing is anatomically specific, its location becomes important when researchers or clinicians interpret pathway abnormalities.
The lateral geniculate nucleus serves as an intermediate destination after signals pass through the optic tract, while the optic radiations carry information onward to the primary visual cortex. Their sequential placement provides identifiable stages for studying how retinal input reaches cortical processing areas and for relating structural changes to altered visual function.
Not all visual information is directed only toward the primary visual cortex. Additional projections contribute to eye movements, reflexes, and spatial orientation, linking visual input with rapid or coordinated behavioral responses. This broader organization explains why visual pathway research considers both perception and the control of actions that depend on visual information.
A lesion can be interpreted in relation to the ordered route from the retina through the optic nerve, optic chiasm, optic tract, lateral geniculate nucleus, optic radiations, and primary visual cortex. Mapping the affected site helps researchers and clinicians predict which stage of visual information processing may be disrupted, even when the underlying disease differs.
Developmental abnormalities can alter the formation or organization of neural structures that carry and process visual information. Studying these changes helps connect abnormal anatomy with predicted effects on visual perception or visually guided behavior. This perspective is useful because it addresses how pathway organization develops, not only how an established pathway is affected by later disease.
Studying the Visual Pathway shows how retinal signals are associated with neural processing that represents visual features and supports behavior. The route includes cortical processing through the primary visual cortex as well as projections involved in eye movements, reflexes, and spatial orientation. Consequently, neuroscience can examine vision as both perception and action guidance.