Automatic sleep stage classification using two facial electrodes.

Standard sleep stage classification is based on visual analysis of central EEG, EOG and EMG signals. Automatic analysis with a reduced number of sensors has been studied as an easy alternative to the standard. In this study, a single-channel electro-oculography (EOG) algorithm was developed for separation of wakefulness, SREM, light sleep (S1, S2) and slow wave sleep (S3, S4).

Automatic sleep detection using activity and facial electrodes.

The most commonly applied unobtrusive sleep monitoring method is actigraphy, the measurement of body limb movements. In spite of its wide clinical acceptance, actigraphy has a low specificity for sleep detection leaving room for novel approaches of unobtrusive sleep monitoring. The present study compared sleep detection by a novel single channel electro-oculography (EOG) method and three activity monitors, with the golden standard of polysomnographic sleep analysis as a reference.

Neurocognitive impairment in human immunodeficiency virus infection is correlated with sexually transmitted disease history.

Background And Objectives: Neurocognitive impairment is common in human immunodeficiency virus (HIV)-infected subjects. The relationship of sexually transmitted diseases to neurocognitive changes is unknown.

Goal: To establish whether HIV-infected patients with a history of syphilis or gonorrhea have a higher rate of neurocognitive dysfunction.

Neuropsychological impairment in human immunodeficiency virus-infection: implications for employment. HNRC Group. HIV Neurobehavioral Research Center.

Individuals infected with the human immunodeficiency virus-Type 1 (HIV-1), are at increased risk for neurobehavioral impairment, particularly in later stages of the disease. Even patients in the medically asymptomatic or minimally symptomatic stages of infection may show mild deficits on comprehensive neuropsychological (NP) test batteries, although the clinical significance of such deficits remains uncertain. The present study used vocational difficulties as markers of clinical significance of NP impairment.

Magnetic resonance imaging morphometric analysis of cerebral volume loss in human immunodeficiency virus infection. The HNRC Group.

Magnetic resonance imaging was used to compare male subjects seropositive for antibody to human immunodeficiency virus type 1 (HIV positive), with and without medical symptoms, with two groups of men who were seronegative (HIV negative). The control subjects included men at high risk for exposure to HIV-1 and those at low risk. None of the HIV-positive subjects met criteria for HIV-associated dementia or had detectable opportunistic brain disease.