Abstract：
OBJECTIVE:To investigate cortical excitability in patients with obstructive sleep apnea syndrome (OSAS) during wakefulness. METHODS:The authors recruited 45 untreated severe OSAS (all males, mean age 47.2 years, mean apnea-hypopnea index=44.6h(-1)) patients and 44 age-matched healthy male volunteers (mean apnea-hypopnea index=3.4h(-1)). The TMS parameters measured were resting motor threshold (RMT), motor evoked potential (MEP) amplitude, cortical silent period (CSP), and short-interval intracortical inhibition (SICI) and intracortical facilitation (ICF). These parameters were measured in the morning (9-10 am) more than 2h after arising and the parameters of patients and controls were compared. The Epworth Sleepiness Scale (ESS) and the Stanford Sleepiness Scale (SSS) were also measured before the TMS study. RESULTS:OSAS patients had a significantly higher RMT and a longer CSP duration (t-test, p<0.001) compared to healthy volunteers. No significant difference was observed between MEP amplitudes at any stimulus intensity or between the SICI (2, 3, 5ms) and ICF (10, 15, 20ms) values of OSAS patients and healthy volunteers (p>0.05). CONCLUSIONS:This TMS-based study suggests that untreated severe OSAS patients have imbalanced cortical excitabilities that enhanced inhibition or decreased brain excitability when awake during the day.
journal_name
Sleep Medjournal_title
Sleep medicineauthors
Joo EY,Kim HJ,Lim YH,Koo DL,Hong SBdoi
10.1016/j.sleep.2010.02.015subject
Has Abstractpub_date
2010-10-01 00:00:00pages
857-61issue
9eissn
1389-9457issn
1878-5506pii
S1389-9457(10)00282-0journal_volume
11pub_type
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