Consequences of temporary inhibition of the medial amygdala on social recognition memory performance in mice
Different lines of investigation suggest that the medial amygdala is causally involved in the processing of information linked to social behaviour in rodents. Here we investigated the consequences of temporary inhibition of the medial amygdala by bilateral injections of lidocaine on long-term social...
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doaj-2f62bf6b729346f7b97043a63320b73e2020-11-24T22:49:05ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2015-04-01910.3389/fnins.2015.00152134945Consequences of temporary inhibition of the medial amygdala on social recognition memory performance in miceJulia eNoack0Rita eMurau1Mario eEngelmann2Otto-von-Guericke-Universität MagdeburgOtto-von-Guericke-Universität MagdeburgOtto-von-Guericke-Universität MagdeburgDifferent lines of investigation suggest that the medial amygdala is causally involved in the processing of information linked to social behaviour in rodents. Here we investigated the consequences of temporary inhibition of the medial amygdala by bilateral injections of lidocaine on long-term social recognition memory as tested in the social discrimination task. Lidocaine or control NaCl solution was infused immediately before learning or before retrieval. Our data show that lidocaine infusion immediately before learning did not affect long-term memory retrieval. However, intra-amygdalar lidocaine infusions immediately before choice interfered with correct memory retrieval. Analysis of the aggressive behaviour measured simultaneously during all sessions in the social recognition memory task support the impression that the lidocaine dosage used here was effective as it – at least partially – reduced the aggressive behaviour shown by the experimental subjects towards the juveniles. Surprisingly, also infusions of NaCl solution blocked recognition memory at both injection time points. The results are interpreted in the context of the importance of the medial amygdala for the processing of non-volatile odours as a major contributor to the olfactory signature for social recognition memory.http://journal.frontiersin.org/Journal/10.3389/fnins.2015.00152/fullBehaviorLidocaineMice, Inbred C57BLSocial Memorylearning and memoryOlfaction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Julia eNoack Rita eMurau Mario eEngelmann |
spellingShingle |
Julia eNoack Rita eMurau Mario eEngelmann Consequences of temporary inhibition of the medial amygdala on social recognition memory performance in mice Frontiers in Neuroscience Behavior Lidocaine Mice, Inbred C57BL Social Memory learning and memory Olfaction |
author_facet |
Julia eNoack Rita eMurau Mario eEngelmann |
author_sort |
Julia eNoack |
title |
Consequences of temporary inhibition of the medial amygdala on social recognition memory performance in mice |
title_short |
Consequences of temporary inhibition of the medial amygdala on social recognition memory performance in mice |
title_full |
Consequences of temporary inhibition of the medial amygdala on social recognition memory performance in mice |
title_fullStr |
Consequences of temporary inhibition of the medial amygdala on social recognition memory performance in mice |
title_full_unstemmed |
Consequences of temporary inhibition of the medial amygdala on social recognition memory performance in mice |
title_sort |
consequences of temporary inhibition of the medial amygdala on social recognition memory performance in mice |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Neuroscience |
issn |
1662-453X |
publishDate |
2015-04-01 |
description |
Different lines of investigation suggest that the medial amygdala is causally involved in the processing of information linked to social behaviour in rodents. Here we investigated the consequences of temporary inhibition of the medial amygdala by bilateral injections of lidocaine on long-term social recognition memory as tested in the social discrimination task. Lidocaine or control NaCl solution was infused immediately before learning or before retrieval. Our data show that lidocaine infusion immediately before learning did not affect long-term memory retrieval. However, intra-amygdalar lidocaine infusions immediately before choice interfered with correct memory retrieval. Analysis of the aggressive behaviour measured simultaneously during all sessions in the social recognition memory task support the impression that the lidocaine dosage used here was effective as it – at least partially – reduced the aggressive behaviour shown by the experimental subjects towards the juveniles. Surprisingly, also infusions of NaCl solution blocked recognition memory at both injection time points. The results are interpreted in the context of the importance of the medial amygdala for the processing of non-volatile odours as a major contributor to the olfactory signature for social recognition memory. |
topic |
Behavior Lidocaine Mice, Inbred C57BL Social Memory learning and memory Olfaction |
url |
http://journal.frontiersin.org/Journal/10.3389/fnins.2015.00152/full |
work_keys_str_mv |
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