Ploskim črvom so odsekali glave, spomin je ostal

http://newswatch.nationalgeographic.com...

http://jeb.biologists.org/content/early...

In French Revolution-style, researchers decapitated flatworms—then did something that would give even Madam Defarge the creeps.

The scientists let the worms’ heads grow back and found that their memories returned along with the new noggins, according to a new study in the Journal of Experimental Biology.

Kolikor vem ploski crvi nimajo glave.

Bo kar oboje primitivno. Nekatere vrste ploskih črvov niti nimajo možganov.

zee je 25. jul 2013 ob 12:24 izjavil:

Kolikor vem ploski crvi nimajo glave.

Bravo! Nekateri imajo toliko znanja, da jim sploh ni treba brati izvorne novice, da lahko komentirajo in sesujejo celo stvar. Res, kapo dol!

Iz izvorne novice:

The team turned to flatworms because, despite their relative simplicity, they have many of the same organs and body organization as people: a brain and nervous system, bilateral symmetry, and even some of the same behaviors.

Torej, odrezali so jim možgane, če že hočeš biti picajzlast. Glave pa res nimajo, ampak izvorna novica pravi, da so jih "decapitated", kar po slovensko pomeni, obglavili. Morda bi National Geographic moral napisati "debrainated" ;)

Drugače pa... zanimivo. Spomin je torej porazdeljen širše. kot smo mislili do sedaj. Zanimivi so tudi tisti (človeški) primeri, ko so doživeli možgansko kap. Še vedno se spomnijo vse, čeprav manj podrobno, kljub temu, da imajo pol možgan nefunkcijonalnih.

At the head of the planarian there is a ganglion under the eyespots. This bi-lobed mass of nerve tissue, the cerebral ganglia, is sometimes referred to as the planarian brain[6] and has been shown to exhibit spontaneous electrophysiological oscillations,[7] similar to the electroencephalographic (EEG) activity of other animals.

Planarian @ Wikipedia
Niso ravno možgani, prej malo večji ganglij, ki spominja na aktivnost v možganih. Sicer vseeno zanimivo.

In 1962, McConnell repeated the experiment,

Bravo, so šli ponavljati 50 let stare poskuse, ki že takrat niso dali nobenih pravih rezultatov, razen senzacionalističnih časopisnih člankov.

Tale prispevek in komentarji nanj je iz leta 2000.
http://everything2.com/title/The+abilit...

In the interests of maintaining high scientific standards, I feel obligated to note that before the cold fusion debacle, McConnell's planaria study was the standard by which Bad Science was judged.

"McConnell's research program with planaria collapsed when other scientists failed to replicate the phenomenon of memory transfer." -- American Psychologist 51:589-598.

McConnell's results on transferred memories did not hold up. A great discussion of the failure of McConnell's research can be found in The Making of Memory: From Molecules to Mind by Steven Rose (1993, ISBN 0385471211).