Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study

Hemamalini Ramasamy Vajravelu; Prabhavathi Krishnan; Saravanan Ayyavoo; Krishnamurthy Narayanan

doi:10.5455/njppp.2016.6.01122015100

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Online Published: 27 Feb 2016

Natl J Physiol Pharm Pharmacol. 2016; 6(2): 146-149

doi: 10.5455/njppp.2016.6.01122015100

Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study

Hemamalini Ramasamy Vajravelu, Prabhavathi Krishnan, Saravanan Ayyavoo, Krishnamurthy Narayanan.

Cited By:7

Abstract
Background: The modern lifestyle is changing the circadian rhythm of the body especially in rotating shift workers. The impact of this might impair cognitive performance of the rotating shift workers who are frequently exposed to unstable circadian rhythm.

Aims and Objective: To evaluate cognitive functions using neurophysiological and neuropsychological methods in rotating night shift and day workers and to compare cognition between the two groups.

Materials and Methods: Forty healthy male security guards (2535 years) who did rotating night shifts at least for 6 months and 40 day workers ( 2535 years) who did not do night shift in last 2 years were involved in the study. A battery of neuropsychological tests, latency, and amplitude of P300 were recorded.

Result: KolmogorovSmirnov test for normalcy showed the latencies and amplitude of P300 to be normally distributed. Students unpaired t-test showed significant difference (p < 0.05) in the various neuropsychological tests and in the latency of P300 between night- and day-shift workers. There was no significant difference in the amplitude of P300.

Conclusion: Night-shift workers who are prone to circadian rhythm alteration will have impaired cognitive performance.

Key words: Circadian rhythm; Shift workers; Sleep deprivation; P300

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Pubmed Style

Vajravelu HR, Krishnan P, Ayyavoo S, Narayanan K. Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study. Natl J Physiol Pharm Pharmacol. 2016; 6(2): 146-149. doi:10.5455/njppp.2016.6.01122015100

Web Style

Vajravelu HR, Krishnan P, Ayyavoo S, Narayanan K. Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study. https://www.njppp.com/?mno=210126 [Access: November 02, 2025]. doi:10.5455/njppp.2016.6.01122015100

AMA (American Medical Association) Style

Vajravelu HR, Krishnan P, Ayyavoo S, Narayanan K. Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study. Natl J Physiol Pharm Pharmacol. 2016; 6(2): 146-149. doi:10.5455/njppp.2016.6.01122015100

Vancouver/ICMJE Style

Vajravelu HR, Krishnan P, Ayyavoo S, Narayanan K. Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study. Natl J Physiol Pharm Pharmacol. (2016), [cited November 02, 2025]; 6(2): 146-149. doi:10.5455/njppp.2016.6.01122015100

Harvard Style

Vajravelu, H. R., Krishnan, . P., Ayyavoo, . S. & Narayanan, . K. (2016) Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study. Natl J Physiol Pharm Pharmacol, 6 (2), 146-149. doi:10.5455/njppp.2016.6.01122015100

Turabian Style

Vajravelu, Hemamalini Ramasamy, Prabhavathi Krishnan, Saravanan Ayyavoo, and Krishnamurthy Narayanan. 2016. Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study. National Journal of Physiology, Pharmacy and Pharmacology, 6 (2), 146-149. doi:10.5455/njppp.2016.6.01122015100

Chicago Style

Vajravelu, Hemamalini Ramasamy, Prabhavathi Krishnan, Saravanan Ayyavoo, and Krishnamurthy Narayanan. "Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study." National Journal of Physiology, Pharmacy and Pharmacology 6 (2016), 146-149. doi:10.5455/njppp.2016.6.01122015100

MLA (The Modern Language Association) Style

Vajravelu, Hemamalini Ramasamy, Prabhavathi Krishnan, Saravanan Ayyavoo, and Krishnamurthy Narayanan. "Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study." National Journal of Physiology, Pharmacy and Pharmacology 6.2 (2016), 146-149. Print. doi:10.5455/njppp.2016.6.01122015100

APA (American Psychological Association) Style

Vajravelu, H. R., Krishnan, . P., Ayyavoo, . S. & Narayanan, . K. (2016) Evaluation of cognition using neurophysiological and neuropsychological tests in rotating night shift workers: a pilot study. National Journal of Physiology, Pharmacy and Pharmacology, 6 (2), 146-149. doi:10.5455/njppp.2016.6.01122015100

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