AI Article Synopsis
- The study investigated how age affects eye regeneration in the snail Achatina fulica, finding that older snails regenerate fewer eye-bearing tentacles and take longer to recover.
- The regenerated eyes in snails older than two months remained smaller than normal even after six months, but some restoration of function was observed, including responses to light stimuli.
- In young snails, the motor responses to visual stimuli suggested that the connections between the eyes and the central nervous system were recovering effectively.
Article Abstract
The dependence of the ability to regenerate the eye on the age of experimental animals was studied in the snail Achatina fulica. The degree of regeneration was estimated by light-microscopic and electrophysiological methods and by analyzing the motor response to visual stimuli. In older age groups, the number of regenerated eye-bearing tentacles decreased, whereas the period of regeneration increased. The regenerated eyes of the snails operated at the age of more than two months remained smaller than normal eyes even after six months. Regeneration of the distal part of the optic nerve was observed, and the regenerated eyes recovered the ability to respond to stimulation by light. In the electroretinogram, the responses of the regenerated eye, compared to the control, were characterised by a lower amplitude and longer repolarization and refractory periods. Manifestations of the motor response to visual stimuli in the young snails with regenerating eyes could be regarded as evidence for the recovery of connection between the organ of sight and the central ganglia.
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