Abstract

OBJECTIVES: We aimed to assess the effect of both classical and heavy metal music on short-term and long-term memory.METHODS: Male rats were separated into three groups: Mozart (n=14), rats were exposed to Mozart´s K-448 piano sonata; Heavy Metal (n=15), rats were exposed to Psychosocial (band: Slipknot), and Control (n=12), rats were exposed to ambient sounds in an acoustically isolated room. The animals were exposed to the music for 8 hours per day, between 10:00 pm to 06:00 am, with an intensity of 50-75 dB, for 61 consecutive days. Twenty-four hours after the final day of adjustment to the enclosure the animals were individually exposed for 5 minutes in the enclosure to explore two identical objects. Ninety minutes after the object recognition training session, the animals were submitted to the short-term memory test and twenty-eight days after the object recognition training session, the animals were submitted to a long-term memory test.RESULTS: There was no modification amongst the three groups during the object recognition training. Regarding the short-term memory test both Mozart (U=33.00, p=0.016, FDR-corrected) and Heavy Metal (U=44.00, p=0.033, FDR-corrected) groups revealed a higher percentage value of significance compared to the control group. In contrast, there was no significant change in relation to the long-term memory test.CONCLUSION: Mozart Sonata K-448 and heavy metal music achieved beneficial effects on the short-term memory in rats.

Highlights

  • Neuroplasticity may be defined as the capability of the central nervous system (CNS) to remodel itself in response to external stimuli [1]

  • On the basis of previous research literature, we project that the animals exposed to music would exhibit an improved performance over the control group

  • We revealed a beneficial effect on the short-term memory in the Heavy Metal group in contrast to the control group

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Summary

Introduction

Neuroplasticity may be defined as the capability of the central nervous system (CNS) to remodel itself in response to external stimuli [1] This process triggers behavioral, cellular and molecular alterations in the CNS, resulting in memory formation [2]. Cellular and molecular alterations in different animals [7, 8, 9, 10, 11] and humans [12, 13, 14] These effects are established in peripheral tissues, given that music can cause physiological changes of heart rate, respiratory rate and blood pressure [15]. The authors reported that music has positive effects, which are consistent with studies in humans

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