Behavioral evidence for memory replay of video episodes in the macaque.
Elife
; 92020 04 20.
Article
in En
| MEDLINE
| ID: mdl-32310083
ABSTRACT
Humans recall the past by replaying fragments of events temporally. Here, we demonstrate a similar effect in macaques. We trained six rhesus monkeys with a temporal-order judgement (TOJ) task and collected 5000 TOJ trials. In each trial, the monkeys watched a naturalistic video of about 10 s comprising two across-context clips, and after a 2 s delay, performed TOJ between two frames from the video. The data are suggestive of a non-linear, time-compressed forward memory replay mechanism in the macaque. In contrast with humans, such compression of replay is, however, not sophisticated enough to allow these monkeys to skip over irrelevant information by compressing the encoded video globally. We also reveal that the monkeys detect event contextual boundaries, and that such detection facilitates recall by increasing the rate of information accumulation. Demonstration of a time-compressed, forward replay-like pattern in the macaque provides insights into the evolution of episodic memory in our lineage.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Mental Recall
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Macaca mulatta
Limits:
Adult
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Animals
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Female
/
Humans
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Male
Language:
En
Journal:
Elife
Year:
2020
Document type:
Article
Affiliation country:
China