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The differential roles of right and left sides of the brain in memory formation
journal contributionposted on 2023-06-07, 21:53 authored by Richard J Andrew
A series of transitions in chick memory formation, with sharp standard timings, which were revealed by amnestic agents, coincide with a series of brief windows of enhanced recall (`retrieval events'), repeating with periods of 16 min (left hemisphere) and 25 min (right). Their timings were recently confirmed by: (1) the demonstration of a brief dip in recall 5 min after each left hemisphere event in the period 0–100 min, (2) spontaneous use of the eye providing direct input to the hemisphere undergoing an event, and (3) good performance in a delayed match-to-sample task after 100 min, only at times of near, or exact coincidence (400 min) with right and left events. The exact coincidence is accompanied by a late episode of consolidation, as is a transition in memory formation in the zebra finch with precisely the same timing. Linkages between right and left versions of a single experience appear to be established as a result of near coincidences of events. The greater involvement of the left hemisphere in initiating such interactions appears to be responsible for a wide range of asymmetries described for interocular transfer and unilateral insult.
JournalBehavioural Brain Research
Department affiliated with
- Biology and Environmental Science Publications
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