Superior Parietal Lobule

	Superior Parietal Lobule The superior parietal lobule is bounded in front by the upper part of the postcentral sulcus, but is usually connected with the postcentral gyrus above the end of the sulcus. The superior parietal lobule contains Brodmann's areas 5 and 7. Behind it is the lateral part of the parieto-occipital sulcus, around the end of which it is joined to the occipital lobe by a curved gyrus, the arcus parietooccipitalis. Below, it is separated from the inferior parietal lobule by the horizontal portion of the intraparietal sulcus. The superior parietal lobule is involved with spatial orientation, and receives a great deal of visual input as well as sensory input from one's hand. In addition to spatial cognition and visual perception, it has also been associated with reasoning, working memory, and attention. It is also involved with other functions of the parietal lobe in general. There are major white matter pathway connections with the superior parietal lobule such as the Cingulum, SLF ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Postcentral Sulcus The postcentral sulcus of the parietal lobe lies parallel to, and behind, the central sulcus in the human brain. (A ''sulcus'' is one of the prominent grooves on the surface of the brain.) The postcentral sulcus divides the postcentral gyrus from the remainder of the parietal lobe. Additional images File:Gray725 postcentral sulcus.png, Lateral surface of left cerebral hemisphere, viewed from above. File:ParietCapts lateral.png, Gyri and sulci of right cerebral hemisphere. Postcentral sulcus labeled in red at top center. File:Cerebral Hemisphere Demonstration - Sanjoy Sanyal - Neuroscience Lab Fall 2013 (Cropped from 27m17s to 27m54s) Postcentral sulcus.webm, Human brain dissection video (36 sec). Demonstrating position of the postcentral sulcus of the left cerebral hemisphere The vertebrate cerebrum (brain) is formed by two cerebral hemispheres that are separated by a groove, the longitudinal fissure. The brain can thus be described as being divided into left and right cer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Intraparietal Sulcus The intraparietal sulcus (IPS) is located on the lateral surface of the parietal lobe, and consists of an oblique and a horizontal portion. The IPS contains a series of functionally distinct subregions that have been intensively investigated using both single cell neurophysiology in primates and human functional neuroimaging. Its principal functions are related to perceptual-motor coordination (e.g., directing eye movements and reaching) and visual attention, which allows for visually-guided pointing, grasping, and object manipulation that can produce a desired effect. The intraparietal sulcus (IPS) plays a pivotal role in multisensory integration, particularly in linking visual and tactile information to guide complex motor actions. Beyond its established roles in numerical cognition and spatial attention, the IPS has emerged as a critical player in tool use and manipulation. The IPS is also thought to play a role in other functions, including processing symbolic numerical infor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Unilateral Neglect Hemispatial neglect is a neuropsychological condition in which, after damage to one hemisphere of the brain (e.g. after a stroke), a deficit in attention and awareness towards the side of space opposite brain damage (contralesional space) is observed. It is defined by the inability of a person to process and perceive stimuli towards the contralesional side of the body or environment. Hemispatial neglect is very commonly contralateral to the damaged hemisphere, but instances of ipsilesional neglect (on the same side as the lesion) have been reported. Presentation Hemispatial neglect results most commonly from strokes and brain unilateral injury to the right cerebral hemisphere, with rates in the critical stage of up to 80% causing visual neglect of the left-hand side of space. Neglect is often produced by massive strokes in the middle cerebral artery region and is variegated, so that most sufferers do not exhibit all of the syndrome's traits. Right-sided spatial neglect is rare be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Astereognosis Astereognosis (or tactile agnosia if only one hand is affected) is the inability to identify an object by active touch of the hands without other sensory input, such as visual or sensory information. An individual with astereognosis is unable to identify objects by handling them, despite intact elementary tactile, proprioceptive, and thermal sensation. With the absence of vision (i.e. eyes closed), an individual with astereognosis is unable to identify what is placed in their hand based on cues such as texture, size, spatial properties, and temperature. As opposed to agnosia, when the object is observed visually, one should be able to successfully identify the object. Individuals with tactile agnosia may be able to identify the name, purpose, or origin of an object with their left hand but not their right, or vice versa, or both hands. Astereognosis refers specifically to those who lack tactile recognition in both hands. In the affected hand(s) they may be able to identify basic s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Medial Longitudinal Fasciculus The medial longitudinal fasciculus (MLF) is a prominent bundle of nerve fibres which pass within the ventral/anterior portion of periaqueductal gray of the mesencephalon (midbrain). It contains the interstitial nucleus of Cajal, responsible for oculomotor control, head posture, and vertical eye movement. The MLF interconnects interneurons of each abducens nucleus with motor neurons of the contralateral oculomotor nucleus; thus, the MLF mediates coordination of horizontal (side to side) eye movements, ensuring the two eyes move in unison (thus also enabling saccadic eye movements). The MLF also contains fibers projecting from the vestibular nuclei to the oculomotor and trochlear nuclei as well as the interstitial nucleus of Cajal; these connections ensure that eye movements are coordinated with head movements (as sensed by the vestibular system). The medial longitudinal fasciculus is the main central connection for the oculomotor nerve, trochlear nerve, and abduce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	SLF I SLF may refer to: Seattle Liberation Front, anti-Vietnam War organization Shuttle Landing Facility, for the Space Shuttle Snowshoe Lava Field, a lava field in British Columbia, Canada Social Liberal Forum, UK Spotted lanternfly, an insect native to parts of China, India, and Vietnam, and recently invading parts of the eastern US Stephen Lewis Foundation Stiff Little Fingers, Northern Irish punk band Subscriber Location Function in IP Multimedia Subsystem Sun Life Financial, Canada Super low frequency electromagnetic waves Superior longitudinal fasciculus, an association fiber tract in the brain UD SLF, a bus * Self loading freight, passengers Student loan A student loan is a type of loan designed to help students pay for post-secondary education and the associated fees, such as tuition, books and supplies, and living expenses. It may differ from other types of loans in the fact that the interest ... forgiveness. {{disambig ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Cingulum (brain) In neuroanatomy, the cingulum or cingulum bundle is an association tract, a nerve tract that projects from the cingulate gyrus to the entorhinal cortex in the brain, allowing for communication between components of the limbic system. It forms the white matter core of the cingulate gyrus, following it from the subcallosal gyrus of the frontal lobe beneath the rostrum of corpus callosum to the parahippocampal gyrus and uncus of the temporal lobe. Neurons of the cingulum receive Afferent nerve fiber, afferent fibers from the parts of the thalamus that are associated with the spinothalamic tract. This, in addition to the fact that the cingulum is a central structure in learning to correct mistakes, indicates that the cingulum is involved in appraisal of pain and reinforcement of behavior that reduces it. Cingulotomy, the surgical severing of the anterior cingulum, is a form of psychosurgery used to treat Major depressive disorder, depression and OCD. The cingulum was one of the earl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Parietal Lobe The parietal lobe is one of the four Lobes of the brain, major lobes of the cerebral cortex in the brain of mammals. The parietal lobe is positioned above the temporal lobe and behind the frontal lobe and central sulcus. The parietal lobe integrates sensory information among various sensory modality, modalities, including spatial sense and navigation (proprioception), the main sensory receptive area for the sense of touch in the somatosensory cortex which is just posterior to the central sulcus in the postcentral gyrus, and the two-streams hypothesis#Dorsal stream, dorsal stream of the visual system. The major sensory inputs from the skin (mechanoreceptor, touch, thermoreceptor, temperature, and nociceptor, pain receptors), relay through the thalamus to the parietal lobe. Several areas of the parietal lobe are important in language processing in the brain, language processing. The somatosensory cortex can be illustrated as a distorted figure – the cortical homunculus (Latin: "li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Inferior Parietal Lobule The inferior parietal lobule (subparietal district) lies below the horizontal portion of the intraparietal sulcus, and behind the lower part of the postcentral sulcus. Also known as Geschwind's territory after Norman Geschwind, an American neurologist, who in the early 1960s recognised its importance. It is a part of the parietal lobe. Structure It is divided from rostral to caudal into two gyri: * One, the supramarginal gyrus ( BA 40), arches over the upturned end of the lateral fissure; it is continuous in front with the postcentral gyrus, and behind with the superior temporal gyrus. * The second, the angular gyrus ( BA 39), arches over the posterior end of the superior temporal sulcus, behind which it is continuous with the middle temporal gyrus. In males, the inferior parietal lobule is significantly more voluminous in the left hemisphere compared to the right. This extreme asymmetry is not present in females and this may contribute to cognitive differences between the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Postcentral Gyrus In neuroanatomy, the postcentral gyrus is a prominent gyrus in the lateral parietal lobe of the human brain. It is the location of the primary somatosensory cortex, the main sensory receptive area for the sense of touch. Like other sensory areas, there is a map of sensory space in this location, called the '' sensory homunculus''. The primary somatosensory cortex was initially defined from surface stimulation studies of Wilder Penfield, and parallel surface potential studies of Bard, Woolsey, and Marshall. Although initially defined to be roughly the same as Brodmann areas 3, 1, and 2, more recent work by Kaas has suggested that for homogeny with other sensory fields only area 3 should be referred to as "primary somatosensory cortex", as it receives the bulk of the thalamocortical projections from the sensory input fields. Structure The lateral postcentral gyrus is bounded by: * medial longitudinal fissure medially (to the middle) * central sulcus rostrally (in front) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Arcus Parietooccipitalis Arcus may refer to: Businesses and organizations ARCUS, the Arctic Research Consortium of the United States, supporting Arctic policy in the U.S. Arcus AS, a Norwegian producer of liquor * Arcus Co., a Bulgarian firearm manufacturer Arcus Foundation, supporting great apes and LGBT rights Arcus-Air, a German airline Gliders Schempp-Hirth Arcus a two-seat glider Pegas Arcus, a Czech paraglider design * Swing Arcus, German paraglider design Human anatomy * Arcus anterior atlantis * Arcus aortae * Arcus corneae * Arcus costalis * Arcus dentalis * Arcus dentalis mandibularis * Arcus dentalis maxillaris * Arcus ductus thoracici * Arcus iliopectineus * Arcus inguinalis * Arcus lumbocostalis lateralis * Arcus lumbocostalis medialis * Arcus palatini * Arcus palatoglossus * Arcus palatopharyngeus * Arcus palmaris profundus * Arcus palmaris superficialis * Arcus pedis longitudinalis pars lateralis * Arcus pedis longitudinalis pars medialis * Arcus pedis transversal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Gyrus In neuroanatomy, a gyrus (: gyri) is a ridge on the cerebral cortex. It is generally surrounded by one or more sulci (depressions or furrows; : sulcus). Gyri and sulci create the folded appearance of the brain in humans and other mammals. Structure The gyri are part of a system of folds and ridges that create a larger surface area for the human brain and other mammalian brains. Because the brain is confined to the skull, brain size is limited. Ridges and depressions create folds allowing a larger cortical surface area, and greater cognitive function, to exist in the confines of a smaller cranium. Development The human brain undergoes gyrification during fetal and neonatal development. In embryonic development, all mammalian brains begin as smooth structures derived from the neural tube. A cerebral cortex without surface convolutions is lissencephalic, meaning 'smooth-brained'. As development continues, gyri and sulci begin to take shape on the fetal brain, with deepe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]