The primary somatosensory area in the human cortex (also called primary somatic sensory cortex or SI) is located in the postcentral gyrus of the parietal lobe and makes up four distinct fields or regions known as Brodmann area 3a, 3b, 1, and 2. The postcentral gyrus is the location of the primary somatosensory area, the main sensory receptive area for the sense of touch. Any individual neuron has its receptive field on the skin.
A relationship between the somatosensory cortical areas and their projection of the body was discovered by recording electrical activity in the human cortex after mechanosensory stimulation of different body parts during neurosurgical procedures. These data led to the construction of somatotopic maps in which a Somatotopic arrangement was generated. Like other sensory areas, there is a map of sensory space called a homunculus at this location. For the primary somatosensory cortex, this is called the sensory homunculus. Areas of this part of the human brain map to certain areas of the body, dependent on the amount or importance of somatosensory input from that area. For example, there is a large area of cortex devoted to sensation in the hands, while the Human back has a much smaller area. Somatosensory information involved with proprioception and posture also targets an entirely different part of the brain, the cerebellum.
Other articles related to "brain":
... He studied the instrument under Aubrey Brain, father of Dennis Brain ... Civil was engaged by Thomas Beecham to play second horn to Dennis Brain in the Royal Philharmonic Orchestra, and when Brain left for the Philharmonia, Civil took over leadership of the section. 1955, Civil joined the Philharmonia himself, becoming principal horn player when Brain died in a car crash in 1957 ...
... Human capital flight, more commonly referred to as "brain drain", is the large-scale emigration of a large group of individuals with technical skills or knowledge ... Brain drain is usually regarded as an economic cost, since emigrants usually take with them the fraction of value of their training sponsored by the ... Brain drain is often associated with de-skilling of emigrants in their country of destination, while their country of emigration experiences the draining of skilled individuals ...
... the health systems have been severely affected by brain drain, so various measures have been suggested and tried to limit the migration of health workers to rich countries ... argued the country should cultivate a sense of security and hope among the elite to curb brain drain because people are not so confident of their countries' future ... And in India, although suffering severe brain drain every year, the Indian government has not to adopted strict policies because they believe that the overseas talent will eventually contribute to the nation in ...
... as to whether the seat of the soul lies in the brain or heart ... Aristotle favored the heart, and thought that the function of the brain was merely to cool the blood ... came down unequivocally in favor of the brain ...
... Neuroscience and brain imaging has shown increasing potential for helping science understand happiness and sadness ... their findings that depression can be diagnosed very accurately just by looking at fMRI brain scans ... scientists may be able to use methods like brain scans to tell us more about all the different ways of being "happy" ...
Famous quotes containing the word brain:
“She turns and looks a moment in the glass,
Hardly aware of her departed lover;
Her brain allows one half-formed thought to pass:
Well now thats done: and Im glad its over.”
—T.S. (Thomas Stearns)
“To accuse another of having weak kidneys, lungs, or heart, is not a crime; on the contrary, saying he has a weak brain is a crime. To be considered stupid and to be told so is more painful than being called gluttonous, mendacious, violent, lascivious, lazy, cowardly: every weakness, every vice, has found its defenders, its rhetoric, its ennoblement and exaltation, but stupidity hasnt.”
—Primo Levi (19191987)