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This interactive brain model is powered by the Wellcome Trust and developed by Matt Wimsatt and Jack Simpson; reviewed by John Morrison, Patrick Hof, and Edward Lein. Structure descriptions were written by Levi Gadye and Alexis Wnuk and Jane Roskams .
The visual system includes the eyes, the connecting pathways through to the visual cortex and other parts of the brain (human system shown).
Brain. Rotate this 3D model to see the four major regions of the brain: the cerebrum, diencephalon, cerebellum, and brainstem. The brain directs our body’s internal functions. It also integrates sensory impulses and information to form perceptions, thoughts, and memories.
The Visual Brain. To understand the visual fields, we have to follow the pathways of the visual brain, introduced in the previous section. The image enters our brains through our eyes, and the first area visited is the occipital lobes.
Pathway to Brain. Visual information from each eye leaves the retina via the ganglion cell axons at the optic disc, creating the optic nerve. The optic nerve, or cranial nerve II, exits the posterior end of the eyeball, and travels posteriorly along the ventral surface of the brain.
Figure 1. Hierarchical organization of the visual system. a) Schematic illustrating information flow from retina to primary visual cortex (V1) through lateral geniculate nucleus (LGN). The...
6.1.1 Describe the region of the electromagnetic spectrum that is perceived by our visual system, and the relative energy of photons at long and short wavelengths. 6.1.2 Describe the major parts of the eye and their role in focusing light to create a clear image. In this section, we will meet the range of the electromagnetic energy spectrum ...
