| Brain: Intraparietal sulcus | ||
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| Lateral surface of left cerebral hemisphere, viewed from the side. (Intraparietal sulcus visible at upper right, running horizontally.) | ||
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| Principal fissures and lobes of the cerebrum viewed laterally. (Fissures not labeled, but parietal lobe is colored yellow.) | ||
| Latin | sulcus intraparietalis | |
| Gray's | subject #189 822 | |
| Part of | Parietal lobe | |
| Acronym(s) | IPS | |
| NeuroNames | hier-79 | |
| NeuroLex ID | birnlex_4031 | |
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[1][2] and human functional neuroimaging.[3] Its principal functions are related to perceptual-motor coordination (for directing eye movements and reaching) and visual attention.
The IPS is also thought to play a role in other functions, including processing symbolic numerical information[4], visuospatial working memory [5] and interpreting the intent of others.[6]
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The IPS role in numerical coginition
Behavioral studies suggest that the IPS is associated with impairments of basic numerical magnitude processing and that there is a pattern of structural and functional alternations in the IPS and in the PFC in dyscalculia.[7] Children with devlopmental dyscalculia were found to have less gray matter in the left IPS.[8]
Additional images
 Lateral surface of left cerebral hemisphere, viewed from above. |
References
- ^ Colby, C.E., & Goldberg, M.E. (1999). Space and attention in parietal cortex. Annual Review of Neuroscience, 22, 319–349.
- ^ Andersen, R.A. (1989). Visual and eye movement functions of the posterior parietal cortex. Annual Review of Neuroscience, 12, 377–403.
- ^ Culham, J.C.; Nancy G. Kanwisher (April 2001). "Neuroimaging of cognitive functions in human parietal cortex". Current Opinion in Neurobiology 11 (2): 157-163. doi:.
- ^ Cantlon J, Brannon E, Carter E, Pelphrey K (2006). "Functional imaging of numerical processing in adults and 4-y-old children.". PLoS Biol 4 (5): e125. doi:. PMID 16594732. link
- ^ Todd JJ & Marois, R (2004). Capacity limit of visual short-term memory in human posterior parietal cortex. Nature, 428, 751-754
- ^ Grafton, Hamilton (2006). "Dartmouth Study Finds How The Brain Interprets The Intent Of Others.". Science Daily. http://www.sciencedaily.com/releases/2006/02/060216191651.htm.
- ^ Ansari,D.& Karmiloff-Smith, A. (2002). Atypical trajectories of numver development: a neuroconstructivist perspective. Trends in Cognitive Science, 6, 511-516
- ^ Kucian, K. et al. (2006). Impaired neural networks for approximate calculation in dyscalculic children: a functional MRI study. Behavior and Brain Function, 2, 31
External links
- Illustrations at ssc.uwo.ca
- intraparietal+sulcus at eMedicine Dictionary
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