[Retention of memory traces in rats subjected to 10-minute clinical death procedure].
Retention of memory traces was tested on the 12th day after 10-min clinical death (CD) produced by the total cessation of blood circulation in Albino rats previously trained for operant food conditioning in a multiple alternative maze. It was found that the structure of memory trace (sequence of operant actions in the maze), motivation activity and habit organization after the resuscitation were completely preserved in all rats independently of the number of the memory traces formed. Short-term negative changes were revealed only in the character of habit realization: the efficiency and reproduction parameters such as "readiness", mobilization activity, and stability of habit realization had lower values during 2-3 sessions. The rate of their recovery after the CD depended on rat's initial motivation state: the higher was the initial motivation, the faster recovered all the reproduction parameters. It is suggested that the observed negative changes in habit realization were nonspecific and were provoked by the CD-induced hyperexcitability of rats.
Kostenkova
V N
VN
Lomonosov State University, Moscow.
Nikol'skaia
K A
KA
D000818:Animals; D003216:Conditioning, Operant; D003643:Death; D005247:Feeding Behavior; D008568:Memory; D051381:Rats; D012151:Resuscitation