| Fang SC |
------>authors3_c= ------>paper_class1=1 ------>Impact_Factor=None ------>paper_class3=3 ------>paper_class2=1 ------>vol=65 ------>confirm_bywho=kueiru ------>insert_bywho=ptsai ------>Jurnal_Rank=None ------>authors4_c= ------>comm_author=1 ------>patent_EDate=None ------>authors5_c= ------>publish_day=1 ------>paper_class2Letter=None ------>page2=30 ------>medlineContent= ------>unit=H0200 ------>insert_date=20080201 ------>iam=4 ------>update_date=None ------>author=??? ------>change_event=4 ------>ISSN= ------>authors_c= ------>score=500 ------>journal_name=Journal of Psychosomatic Research ------>paper_name=Heart rate variability and daytime functioning in insomniacs and normal sleepers: preliminary results ------>confirm_date=20080818 ------>tch_id=091090 ------>pmid=18582608 ------>page1=23 ------>fullAbstract=OBJECTIVES: This study examined the differences in heart rate variability (HRV) and daytime functioning between insomniacs and normal sleepers. METHODS: All participants underwent an interview, a medical examination, and a sleep measurement protocol during which they wore an actigraph and logged a sleep diary for a 7-day period to verify their eligibility. Included in the study were 18 insomniacs and 21 normal sleepers. During a laboratory session, these participants completed four paper-pencil tests of sleepiness, anxiety, fatigue, and concentration difficulty and the Wisconsin Card Sorting Test. Resting HRV was recorded under paced breathing. RESULTS: Neither did insomniacs experience cognitive impairment nor did they experience excessive daytime sleepiness compared with normal sleepers. However, insomniacs experienced higher frequency of fatigue [effect size (ES)=1.14, P=.002] compared with normal sleepers. There was also a trend toward higher trait anxiety score (ES=0.62) and concentration difficulty (ES=0.59) in insomniacs than in normal sleepers. Although a tendency toward lower resting high- frequency (HF) HRV (ES=-0.57) in insomniacs than in normal sleepers was noted, neither the resting low-frequency (LF) HRV nor the LF/HF ratio were different between groups. Subjective sleep estimates correlated to self-reported daytime consequences such as fatigue and concentration difficulty but not cognitive function. On the contrary, objective sleep estimates correlated to problem-solving/conceptualization and learning but not self-reported daytime consequences. CONCLUSIONS: Insomniacs are not sleepier during the day than normal sleepers. However, they may experience such a daytime symptom as fatigue although cognitive function remains unimpaired. ------>tmu_sno=None ------>sno=16630 ------>authors2=Huang CJ ------>authors3=Yang TT ------>authors4=Tsai PS ------>authors5= ------>authors6= ------>authors6_c= ------>authors=Fang SC ------>delete_flag=0 ------>SCI_JNo=None ------>authors2_c= ------>publish_area=0 ------>updateTitle=Heart rate variability and daytime functioning in insomniacs and normal sleepers: preliminary results. ------>language=2 ------>check_flag=None ------>submit_date=None ------>country=None ------>no=1 ------>patent_SDate=None ------>update_bywho=None ------>publish_year=2008 ------>submit_flag=None ------>publish_month=6 |