| Memory,
one of the most complex functions of the brain comprises of multiple
components such as perception, registration, consolidation, storage,
retrieval and decay. The present study was undertaken to evaluate
the impact of different training sessions on the retention capacity
of rats. The capacity of retention of learnt task was measured using
exteroceptive behavioral models such as Hexagonal swimming pool apparatus,
Hebb-Williams maze and Elevated plus-maze. A total of 150 rats divided
into fifteen groups were employed in the present study. The animals
were subjected to different training sessions during first three days.
The ability to retain the learned task was tested after single, sub-acute,
acute, sub-chronic and chronic exposure to above exteroceptive memory
models in separate groups of animals. The memory score of all animals
was recorded after 72 h, 192 h and 432 h of their last training trial.
Rats of single exposure group did not show any effect on memory. Sub-acute
training group animals showed improved memory up to 72 h only, where
as in acute and sub-chronic training groups this memory improvement
was extended up to 192 h. The rats, which were subjected to chronic
exposures showed a significant improvement in retention capacity that
lasted up to a period of eighteen days. These observations suggest
that repeated rehearsals at regular intervals are probably necessary
for consolidation of long-term memory. It was observed that sub-acute,
acute and sub-chronic exposures, improved the retrieval ability of
rats but this memory improving effect was short lived. Thus, rehearsal
or training plays a crucial role in enhancing one's capacity of retaining
the learnt information.
KEY
WORDS: Training, retention, plus-maze, rehearsal.
|
