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MIT researchers have shown, for the first time ever, that memories are stored in specific brain cells. By triggering a small cluster of neurons, the researchers were able to force the subject to recall a specific memory. By removing these neurons, the subject would lose that memory.
...
The main significance here is that we finally have proof that memories (engrams, in neuropsychology speak) are physical rather than conceptual.
http://www.extremetech.com/extreme/123485-mit-discovers-the-location-of-memories-individual-neurons




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niekt0
 niekt0      15.12.2012 - 10:37:58 , level: 1, UP   NEW
To je dost bulvarny titulok.
Osobne by som skor tipoval aktivaciu niektorych memov, ale samozrejme to cele najskor bude este ovela zlozitejsie.

V poslednej dobe sa napriklad priklada vacsia vaha synchronizacii neuronov, nez samotnemu neuronu.

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timko
 timko      15.12.2012 - 10:41:59 , level: 2, UP   NEW
Jo, mne tiez prisiel bulvarny. Zaujimal ma ale nazor niekoho, kto do toho vidi viac.

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cv::be
 cv::be      15.12.2012 - 10:37:10 , level: 1, UP   NEW
inak treba dodat, ze toto nie je prva lastovicka. podobne, ale elektrofyziologicke pokusy uz par rokov dozadu spravil Christof Koch & comp.
ale ako pozeram koncept je znamy uz davno
http://en.wikipedia.org/wiki/Grandmother_cell

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timko
 timko      15.12.2012 - 10:40:35 , level: 2, UP   NEW
mea culpa, v tomto nemam velmi prehlad

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ziman
 ziman      15.12.2012 - 09:52:19 (modif: 15.12.2012 - 10:44:16), level: 1, UP   NEW !!CONTENT CHANGED!!
Z abstraktu clanku v Nature:

Together, our findings indicate that activating a sparse but specific ensemble of hippocampal neurons that contribute to a memory engram is sufficient for the recall of that memory.

Pripada mi, ze "memories are stored in specific brain cells" je prilis odvazna interpretacia tohto zistenia.

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edit:

MIT discovers the location of light

MIT scientists have found that manipulation with mechanical devices built in the walls of human buildings is sufficient for release of light into space. Furthermore, when these devices were removed, no light response could be induced. This provides a proof that light has a physical basis and is stored in these specific devices.

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cv::be
 cv::be      15.12.2012 - 10:28:14 (modif: 15.12.2012 - 10:28:42), level: 2, UP   NEW !!CONTENT CHANGED!!
tiez si myslim.
ja mam o tom asi taku predstavu, ze do hippocampu konverguju senzoricke vstupy, ktore specificky aktivuju konkretne bunky, ktore popisuje clanok. no a tieto nasledne, napriklad ked si spomeniem na tvar mamy, aktivuju engram/y v relevantnych vizualnych kortexoch.

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ziman
 ziman      15.12.2012 - 10:47:28 , level: 3, UP   NEW
Nie som si uplne isty, ci ta citam spravne, ale trebars H.M. mal hippocampus odobrany bilateralne a mal iba retrogradnu amneziu, takze pri vybavovani spomienok hippocampus, zda sa, nie je nevyhnutny.

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cv::be
 cv::be      15.12.2012 - 11:03:18 , level: 4, UP   NEW
mal anterogradnu amneziu a mas pravdu. moje vysvetlenie tym padom asi nie je az tak ok. v podstate som sa snazil iba vysvetlit tieto fakty. ale tu zonu konvergencie stale mozem presunut aj niekam inam, mimo hippocampus :) ale potom mozem este spekulovat, ze hippocampus moze byt jeden z paralelnych systemov pre ich vybavovanie. popravde sa tomu az tak nerozumiem na to aby som mohol s istotou hovorit

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ziman
 ziman      15.12.2012 - 11:06:11 , level: 5, UP   NEW
bah, antero-, ofc :)