The<unk>  are the<unk>  cortical regions of the five sensory systems in the brain (taste, olfaction, touch, hearing and vision). Except for the olfactory system, they receive sensory information from thalamic nerve projections. The term<unk>  comes from the fact that these cortical<unk>  are the first level in a hierarchy of sensory information processing in the brain. This should not be confused with the function of the<unk>  motor cortex, which is the last site in the cortex for processing motor commands. Though some<unk>  of the human brain that receive<unk>  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<unk>  somatosensory cortex (SI) is across the central sulcus and behind the<unk>  motor cortex configured to generally correspond with the arrangement of nearby motor cells related to specific body parts. The<unk> includes gray matter along the central gyrus and its extension into the postcentral gyrus. * Taste: The<unk>  gustatory<unk> consists of the anterior part of the insula and the frontal operculum. * Olfaction: The olfactory cortex is 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<unk> known as V1, striate cortex, or<unk>  visual cortex, Brodmann<unk> 17) is located on the calcarine sulcus deep within the inside folds of the occipital lobe. * Hearing: The<unk>  auditory cortex is located on the transverse gyri that lie on the back of the superior temporal convolution of the temporal lobes.
Primary sensory areas
Extrapyramidal system
Sensory cortex
Secondary sensory endings
Somatosensory system
Upper motor neuron
Neuronal ensemble
Cortical minicolumn