Effects of long-term continuous exposure to light on memory and anxiety in mice
The studies on the relationship between the light/dark cycle and memory function mostly used protocols of acute disruption of the circadian rhythm. The aim of the present study is to verify the effects of long-term continuous exposure to light on memory, anxiety and motor parameters of mice tested i...
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| Veröffentlicht in: | Physiology & behavior 2005-09, Vol.86 (1), p.218-223 |
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| creator | Castro, J.P.M.V. Frussa-Filho, R. Fukushiro, D.F. Chinen, C.C. Abílio, V.C. Silva, R.H. |
| description | The studies on the relationship between the light/dark cycle and memory function mostly used protocols of acute disruption of the circadian rhythm. The aim of the present study is to verify the effects of long-term continuous exposure to light on memory, anxiety and motor parameters of mice tested in the plus-maze discriminative avoidance task. Mice were conditioned to choose between the two enclosed arms (one aversive and one non-aversive) while avoiding the open arms of a modified elevated plus-maze apparatus. Memory was evaluated by the time spent in the aversive enclosed arm, anxiety was evaluated by the time spent in the open arms and locomotor behavior was evaluated by number of entries in the arms of the maze. The results showed that long-term (35–42 days) continuous light exposure did not modify memory or anxiety parameters but increased locomotor activity. While the increase in locomotor behavior is in line with previous studies, the unexpected absence of alterations in memory and anxiety (reported to be influenced by the circadian rhythm) is discussed. |
| doi_str_mv | 10.1016/j.physbeh.2005.07.009 |
| format | Article |
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The aim of the present study is to verify the effects of long-term continuous exposure to light on memory, anxiety and motor parameters of mice tested in the plus-maze discriminative avoidance task. Mice were conditioned to choose between the two enclosed arms (one aversive and one non-aversive) while avoiding the open arms of a modified elevated plus-maze apparatus. Memory was evaluated by the time spent in the aversive enclosed arm, anxiety was evaluated by the time spent in the open arms and locomotor behavior was evaluated by number of entries in the arms of the maze. The results showed that long-term (35–42 days) continuous light exposure did not modify memory or anxiety parameters but increased locomotor activity. 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The aim of the present study is to verify the effects of long-term continuous exposure to light on memory, anxiety and motor parameters of mice tested in the plus-maze discriminative avoidance task. Mice were conditioned to choose between the two enclosed arms (one aversive and one non-aversive) while avoiding the open arms of a modified elevated plus-maze apparatus. Memory was evaluated by the time spent in the aversive enclosed arm, anxiety was evaluated by the time spent in the open arms and locomotor behavior was evaluated by number of entries in the arms of the maze. The results showed that long-term (35–42 days) continuous light exposure did not modify memory or anxiety parameters but increased locomotor activity. While the increase in locomotor behavior is in line with previous studies, the unexpected absence of alterations in memory and anxiety (reported to be influenced by the circadian rhythm) is discussed.</description><subject>Affectivity. Emotion</subject><subject>Analysis of Variance</subject><subject>Animal</subject><subject>Animals</subject><subject>Anxiety</subject><subject>Anxiety - therapy</subject><subject>Avoidance Learning - radiation effects</subject><subject>Behavior, Animal</subject><subject>Biological and medical sciences</subject><subject>Circadian rhythms</subject><subject>Discrimination Learning - radiation effects</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Learning. Memory</subject><subject>Light</subject><subject>Locomotor activity</subject><subject>Male</subject><subject>Maze Learning - radiation effects</subject><subject>Memory</subject><subject>Memory - physiology</subject><subject>Memory - radiation effects</subject><subject>Mice</subject><subject>Mice, Inbred Strains</subject><subject>Personality. Affectivity</subject><subject>Phototherapy</subject><subject>Psychology. Psychoanalysis. Psychiatry</subject><subject>Psychology. Psychophysiology</subject><subject>Time Factors</subject><issn>0031-9384</issn><issn>1873-507X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkcFq3DAQQEVJaTZpP6FBl_RmdyTZlnUqZUnTQiCXFnoTsjzKarGtjWSH7N9HYQ05ZkAMDG80wxtCvjIoGbDm-7487I6pw13JAeoSZAmgPpANa6UoapD_z8gGQLBCibY6Jxcp7SGHqMQncs4aaIXifEPub5xDOycaHB3C9FDMGEdqwzT7aQlLovh8CGmJSOdAB_-wm2mY6IhjiEdqpj6_Z4_zkfpc9RY_k4_ODAm_rPmS_Pt183f7u7i7v_2z_XlX2IpXcyEUoKqVcCCrThqsjTIWFXcSO2a5lQ3jXFVGsUq0aFoBvembTjrkhlvBxSX5dvr3EMPjgmnWo08Wh8FMmNfWTdsAbxvxLsgk1BW0KoP1CbQxpBTR6UP0o4lHzUC_Ktd7vSrXr8o1SJ2V576rdcDSjdi_da2OM3C9AiZZM7hoJuvTGyeZkLxuMvfjxGH29uQx6mQ9ThZ7H_OJdB_8O6u8AEiioh4</recordid><startdate>20050915</startdate><enddate>20050915</enddate><creator>Castro, J.P.M.V.</creator><creator>Frussa-Filho, R.</creator><creator>Fukushiro, D.F.</creator><creator>Chinen, C.C.</creator><creator>Abílio, V.C.</creator><creator>Silva, R.H.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7TK</scope><scope>7X8</scope></search><sort><creationdate>20050915</creationdate><title>Effects of long-term continuous exposure to light on memory and anxiety in mice</title><author>Castro, J.P.M.V. ; Frussa-Filho, R. ; Fukushiro, D.F. ; Chinen, C.C. ; Abílio, V.C. ; Silva, R.H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c424t-390e9593f074b7ae5a9ace92f7eb1c2c7612294a91438ea830dad6b7fe2a2c323</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Affectivity. Emotion</topic><topic>Analysis of Variance</topic><topic>Animal</topic><topic>Animals</topic><topic>Anxiety</topic><topic>Anxiety - therapy</topic><topic>Avoidance Learning - radiation effects</topic><topic>Behavior, Animal</topic><topic>Biological and medical sciences</topic><topic>Circadian rhythms</topic><topic>Discrimination Learning - radiation effects</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Learning. Memory</topic><topic>Light</topic><topic>Locomotor activity</topic><topic>Male</topic><topic>Maze Learning - radiation effects</topic><topic>Memory</topic><topic>Memory - physiology</topic><topic>Memory - radiation effects</topic><topic>Mice</topic><topic>Mice, Inbred Strains</topic><topic>Personality. Affectivity</topic><topic>Phototherapy</topic><topic>Psychology. Psychoanalysis. Psychiatry</topic><topic>Psychology. Psychophysiology</topic><topic>Time Factors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Castro, J.P.M.V.</creatorcontrib><creatorcontrib>Frussa-Filho, R.</creatorcontrib><creatorcontrib>Fukushiro, D.F.</creatorcontrib><creatorcontrib>Chinen, C.C.</creatorcontrib><creatorcontrib>Abílio, V.C.</creatorcontrib><creatorcontrib>Silva, R.H.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Physiology & behavior</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Castro, J.P.M.V.</au><au>Frussa-Filho, R.</au><au>Fukushiro, D.F.</au><au>Chinen, C.C.</au><au>Abílio, V.C.</au><au>Silva, R.H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of long-term continuous exposure to light on memory and anxiety in mice</atitle><jtitle>Physiology & behavior</jtitle><addtitle>Physiol Behav</addtitle><date>2005-09-15</date><risdate>2005</risdate><volume>86</volume><issue>1</issue><spage>218</spage><epage>223</epage><pages>218-223</pages><issn>0031-9384</issn><eissn>1873-507X</eissn><abstract>The studies on the relationship between the light/dark cycle and memory function mostly used protocols of acute disruption of the circadian rhythm. The aim of the present study is to verify the effects of long-term continuous exposure to light on memory, anxiety and motor parameters of mice tested in the plus-maze discriminative avoidance task. Mice were conditioned to choose between the two enclosed arms (one aversive and one non-aversive) while avoiding the open arms of a modified elevated plus-maze apparatus. Memory was evaluated by the time spent in the aversive enclosed arm, anxiety was evaluated by the time spent in the open arms and locomotor behavior was evaluated by number of entries in the arms of the maze. The results showed that long-term (35–42 days) continuous light exposure did not modify memory or anxiety parameters but increased locomotor activity. While the increase in locomotor behavior is in line with previous studies, the unexpected absence of alterations in memory and anxiety (reported to be influenced by the circadian rhythm) is discussed.</abstract><cop>Cambridge</cop><cop>New York, NY</cop><pub>Elsevier Inc</pub><pmid>16083922</pmid><doi>10.1016/j.physbeh.2005.07.009</doi><tpages>6</tpages></addata></record> |
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| subjects | Affectivity. Emotion Analysis of Variance Animal Animals Anxiety Anxiety - therapy Avoidance Learning - radiation effects Behavior, Animal Biological and medical sciences Circadian rhythms Discrimination Learning - radiation effects Fundamental and applied biological sciences. Psychology Learning. Memory Light Locomotor activity Male Maze Learning - radiation effects Memory Memory - physiology Memory - radiation effects Mice Mice, Inbred Strains Personality. Affectivity Phototherapy Psychology. Psychoanalysis. Psychiatry Psychology. Psychophysiology Time Factors |
| title | Effects of long-term continuous exposure to light on memory and anxiety in mice |
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