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Scopolamine prevents retrograde memory interference between two different learning tasks.
Physiol Behav. 2011 Mar 01; 102(3-4):332-7.PB

Abstract

Subjects exposed to learning experiences could store the new information through memory consolidation process. If consolidation is interfered by exposing the experimental subjects to another novel stimulus, memory of the first learning situation is sometimes disrupted. The cholinergic system is critically involved in acquisition of new information. Here, we use low doses of the muscarinic cholinergic receptor antagonist scopolamine (SCOP) to disrupt acquisition of new information, but sparing memory consolidation of previous memories. Mice were consecutively exposed to two learning situations: the inhibitory avoidance (IA) and the nose-poke habituation (NPH) tasks. The exposure of mice to the NPH task, after being trained in the IA apparatus, impairs consolidation of the avoidance memory in a manner related to the duration of the exposure to the NPH task. If the exposure to the NPH task occurred after reactivation of the avoidance memory, reconsolidation was impaired. Blockade of acquisition of the NPH task by SCOP allowed consolidation and reconsolidation of the avoidance memory. Results indicate that cholinergic system blockade by SCOP impairs acquisition but is less able to affect memory consolidation. The mere exposure and perception of a novel situation are not sufficient conditions to cause impairment of retention performance about previously learned information, but effective processing leading to acquisition of the NPH task information is necessary to cause the interference between both learning situations.

Authors+Show Affiliations

Laboratorio de Neurofarmacología de los Procesos de Memoria, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina. marianoblake@yahoo.com.arNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21118701

Citation

Blake, M G., et al. "Scopolamine Prevents Retrograde Memory Interference Between Two Different Learning Tasks." Physiology & Behavior, vol. 102, no. 3-4, 2011, pp. 332-7.
Blake MG, Boccia MM, Krawczyk MC, et al. Scopolamine prevents retrograde memory interference between two different learning tasks. Physiol Behav. 2011;102(3-4):332-7.
Blake, M. G., Boccia, M. M., Krawczyk, M. C., & Baratti, C. M. (2011). Scopolamine prevents retrograde memory interference between two different learning tasks. Physiology & Behavior, 102(3-4), 332-7. https://doi.org/10.1016/j.physbeh.2010.11.026
Blake MG, et al. Scopolamine Prevents Retrograde Memory Interference Between Two Different Learning Tasks. Physiol Behav. 2011 Mar 1;102(3-4):332-7. PubMed PMID: 21118701.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Scopolamine prevents retrograde memory interference between two different learning tasks. AU - Blake,M G, AU - Boccia,M M, AU - Krawczyk,M C, AU - Baratti,C M, Y1 - 2010/11/29/ PY - 2010/09/29/received PY - 2010/11/08/revised PY - 2010/11/22/accepted PY - 2010/12/2/entrez PY - 2010/12/2/pubmed PY - 2011/5/26/medline SP - 332 EP - 7 JF - Physiology & behavior JO - Physiol Behav VL - 102 IS - 3-4 N2 - Subjects exposed to learning experiences could store the new information through memory consolidation process. If consolidation is interfered by exposing the experimental subjects to another novel stimulus, memory of the first learning situation is sometimes disrupted. The cholinergic system is critically involved in acquisition of new information. Here, we use low doses of the muscarinic cholinergic receptor antagonist scopolamine (SCOP) to disrupt acquisition of new information, but sparing memory consolidation of previous memories. Mice were consecutively exposed to two learning situations: the inhibitory avoidance (IA) and the nose-poke habituation (NPH) tasks. The exposure of mice to the NPH task, after being trained in the IA apparatus, impairs consolidation of the avoidance memory in a manner related to the duration of the exposure to the NPH task. If the exposure to the NPH task occurred after reactivation of the avoidance memory, reconsolidation was impaired. Blockade of acquisition of the NPH task by SCOP allowed consolidation and reconsolidation of the avoidance memory. Results indicate that cholinergic system blockade by SCOP impairs acquisition but is less able to affect memory consolidation. The mere exposure and perception of a novel situation are not sufficient conditions to cause impairment of retention performance about previously learned information, but effective processing leading to acquisition of the NPH task information is necessary to cause the interference between both learning situations. SN - 1873-507X UR - https://www.unboundmedicine.com/medline/citation/21118701/Scopolamine_prevents_retrograde_memory_interference_between_two_different_learning_tasks_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0031-9384(10)00426-9 DB - PRIME DP - Unbound Medicine ER -