PT - JOURNAL ARTICLE AU - Marwan S. Al-Nimer TI - Intraindividual and interindividual variations in psychomotor task performance in spontaneously menstruating women DP - 2008 Jan 01 TA - Neurosciences Journal PG - 17--22 VI - 13 IP - 1 4099 - http://nsj.org.sa/content/13/1/17.short 4100 - http://nsj.org.sa/content/13/1/17.full SO - Neurosciences (Riyadh)2008 Jan 01; 13 AB - OBJECTIVE: To examine the variability in psychomotor task performance in women in reference to the menstrual cycle.METHODS: One hundred and eighty young women with spontaneous regular menstrual period of 30 days duration and 20 young men were assessed in the Department of Pharmacology, College of Medicine, Al-Mustansiriya University, Baghdad, Iraq during 2003.RESULTS: Women had significantly lower recognition as well as motor reaction time than men with wide inter and intraindividual variations. Women also had a lower critical flicker fusion frequency threshold than men with more variation. The changes in psychomotor performance are not specific for a certain phase of the menstrual cycle.CONCLUSION: Spontaneously menstruating young women are not good participants for psychomotor performance studies because of wide intra- and interindividual variations.