In Review

Vision begins when photoreceptors in the retina at the back of the eye convert light energy into neural activity in neighboring ganglion cells, the axons of which form the optic nerve leading to the brain. P ganglion cells receive input mostly from cones and carry information about color and fine detail, whereas M ganglion cells receive input mostly from rods and carry information about light but not color. Visual input takes two routes into the brain. The geniculostriate pathway travels through the LGN of the thalamus to layer IV of the striate cortex in the occipital lobe. The tectopulvinar pathway is from the tectum of the midbrain to the pulvinar of the thalamus and then to visual cortical areas. Both pathways contribute to the dorsal and ventral visual streams that project to the parietal and temporal lobes, respectively. The dorsal stream to the parietal lobe processes the visual guidance of movements (the how), whereas the ventral stream to the temporal lobe processes the visual perception of objects (the what).

Peripheral Neuropathy Natural Treatment Options

Peripheral Neuropathy Natural Treatment Options

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