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  2. Visual system - Wikipedia

    en.wikipedia.org/wiki/Visual_system

    The visual system includes the eyes, the connecting pathways through to the visual cortex and other parts of the brain (human system shown). The eye is the sensory organ of the visual system. The iris , pupil , and sclera are visible

  3. Two-streams hypothesis - Wikipedia

    en.wikipedia.org/wiki/Two-streams_hypothesis

    As visual information exits the occipital lobe, and as sound leaves the phonological network, it follows two main pathways, or "streams". The ventral stream (also known as the "what pathway") leads to the temporal lobe, which is involved with object and visual identification and recognition.

  4. Visual pathway lesions - Wikipedia

    en.wikipedia.org/wiki/Visual_pathway_lesions

    The visual pathway consists of structures that carry visual information from the retina to the brain.Lesions in that pathway cause a variety of visual field defects. In the visual system of human eye, the visual information processed by retinal photoreceptor cells travel in the following way:

  5. Visual field - Wikipedia

    en.wikipedia.org/wiki/Visual_field

    Visual pathway lesions From top to bottom: 1. Complete loss of vision in the right eye 2. Bitemporal hemianopia 3. Homonymous hemianopia 4. Quadrantanopia 5. & 6. Quadrantanopia with macular sparing. The visual pathway consists of structures that carry visual information from the retina to the brain. Lesions in the pathway cause a variety of ...

  6. Visual perception - Wikipedia

    en.wikipedia.org/wiki/Visual_perception

    Recent descriptions of visual association cortex describe a division into two functional pathways, a ventral and a dorsal pathway. This conjecture is known as the two streams hypothesis . The human visual system is generally believed to be sensitive to visible light in the range of wavelengths between 370 and 730 nanometers of the ...

  7. Visual processing - Wikipedia

    en.wikipedia.org/wiki/Visual_processing

    There is a traditional view that visual processing follows a feedforward system where there is a one-way process by which light is sent from the retina to higher cortical areas, however, there is increasing evidence that visual pathways operate bidirectionally, with both feedforward and feedback mechanisms in place that transmit information to ...

  8. Lateral geniculate nucleus - Wikipedia

    en.wikipedia.org/wiki/Lateral_geniculate_nucleus

    The average volume of each LGN in an adult human is about 118mm ... The other major retino–cortical visual pathway is the tectopulvinar pathway, ...

  9. Tectopulvinar pathway - Wikipedia

    en.wikipedia.org/wiki/Tectopulvinar_pathway

    The tectopulvinar pathway is a fast-acting pathway that provides the viewer with information on the absolute spatial information of objects. The pathway plays a large role in directing visual spatial attention and is particularly responsive to novel stimuli that appear or move in peripheral vision; however, because it receives mostly magnocellular visual input, the tectopulvinar pathway is not ...