The primary sensory areas are the main cerebral areas that receive sensory information from thalamic nerve projections.
Though some areas of the human brain that receive primary sensory information remain poorly defined, each of the five sensory modalities has been recognized to relate to specific groups of brain cells that begin to categorize and integrate sensory information.
- Somatosensory system: The primary somatosensory cortex (SI) is across the central sulcus and behind the primary motor cortex configured to generally correspond with the arrangement of nearby motor cells related to specific body parts. The area includes gray matter along the central gyrus and its extension into the postcentral gyrus.
- Taste: The primary gustatory area is near the face representation within the postcentral gyrus. It starts at about the most lateral point on the gyrus and continues into the insular cortex where the postcentral gyrus folds over the operculum (Latin: eyelid or lid) of the gyrus at the lateral sulcus.
- Olfaction: Olfactory cortex located in the uncus which is found along the ventral surface of the temporal lobe. Olfaction is the only sensory system that is not routed through the thalamus.
- Vision: The visual area known as V1, striate cortex, or (primary visual cortex, Brodmann area 17) is located on the calcarine sulcus deep within the inside folds of the occipital lobe.
- Hearing: The primary auditory cortex is located on the transverse gyri that lie on the back of the superior temporal convolution of the temporal lobes.
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Famous quotes containing the words primary, sensory and/or areas:
“It was the feeling of a passenger on an ocean steamer whose mind will not give him rest until he has been in the engine-room and talked with the engineer. She wanted to see with her own eyes the action of primary forces; to touch with her own eyes the action of primary forces; to touch with her own hand the massive machinery of society; to measure with her own mind the capacity of the motive power. She was bent upon getting to the heart of the great American mystery of democracy and government.”
—Henry Brooks Adams (1838–1918)
“Our talk of external things, our very notion of things, is just a conceptual apparatus that helps us to foresee and control the triggerings of our sensory receptors in the light of previous triggering of our sensory receptors.”
—Willard Van Orman Quine (b. 1908)
“If a walker is indeed an individualist there is nowhere he can’t go at dawn and not many places he can’t go at noon. But just as it demeans life to live alongside a great river you can no longer swim in or drink from, to be crowded into safer areas and hours takes much of the gloss off walking—one sport you shouldn’t have to reserve a time and a court for.”
—Edward Hoagland (b. 1932)