Precuneus

from Wikipedia, the free encyclopedia
Precuneus

The term precuneus refers to that part of the medial cerebral mantle that is located between the occipital lobe and the paracentral lobule . It is separated rostrally and basally by the branched extensions of the cingulate sulcus from the paracentral lobule and cingulate gyrus, and occipitally from the parietooccipital sulcus . It is sometimes described as part of the superior parietal lobule in neurophysiological terms .

topography

  • Superior parietal lobule

  • Precuneus

The precuneus merges at the edge of the mantle into the superior parietal lobule, with which it may share neurophysiological tasks. Functionally and anatomically, it forms the transition between the default mode network and fronto-parietal attention networks .

function

The precuneus plays an important role in visual cognition and attention processes. It is assigned a central role in the visual presentation. As part of the default mode network , the Precuneus is important for calling up episodic , in particular autobiographical, memory contents. Recent research shows that the Precuneus can also develop independent memory representations . Researchers at the Institute for Medical Psychology and Behavioral Neurobiology at the University Hospital in Tübingen have researched how the hippocampus and the precuneus work together in learning and have shown that the precuneus could represent the anatomical location of the engram . The precunue seems to be particularly important for the encoding of specific spatial information in long-term memory.

Web links

Commons : Precuneus  - collection of images, videos and audio files

Individual evidence

  1. ↑ Sobotta, Johannes and H. Becher: Atlas of the human anatomy. 3rd part: blood circulation, heart, peripheral nerves and blood vessels, lymph vessels, central nervous system, sensory organs, skin. Urban & Schwarzenberg, Munich - 16 1962, Fig. 210; Text on page 244
  2. ↑ AV Utevsky, DV Smith, SA Huettel: precuneus is a functional core of the default-mode network . In: Journal of neuroscience . 2014, doi : 10.1523 / JNEUROSCI.4227-13.2014 ( jneurosci.org ).
  3. ↑ MF Land: Do we have an internal model of the outside world? In: Philos Trans R Soc Lond B Biol Sci . 2014, doi : 10.1098 / rstb.2013.0045 ( royalsocietypublishing.org ).
  4. ^ P Fossati: Imaging autobiographical memory . In: Dialogues Clin Neurosci . 2013, PMC 3898686 (free full text).
  5. ↑ S Brodt, D Pöhlchen, VL Flanagin, S glass Auer, S Gais, M Schönauer: Rapid and independent memory formation in the parietal cortex . In: Proceedings of the National Academy of Sciences (PNAS) . October 31, 2016, doi : 10.1073 / pnas.1605719113 ( uni-tuebingen.de [PDF]).
  6. ^ S Brodt, S Gais, J Beck, M Erb, K Scheffler, M Schönauer: Fast track to the neocortex: A memory engram in the posterior parietal cortex . In: Science . 2018, doi : 10.1126 / science.aau2528 ( sciencemag.org ).
  7. ↑ BH Schott BH, T Wüstenberg, E Lücke, IM Pohl, A Richter, CI Seidenbecher, S Pollmann, JM Kizilirmak, A Richardson-Klavehn .: Gradual acquisition of visuospatial associative memory representations via the dorsal precuneus . In: Human Brain Mapping . 2018, doi : 10.1002 / hbm.24467 ( wiley.com ).