Early central nervous system response to HIV infection: sleep distortion and cognitive-motor decrements.
OBJECTIVE
To repeat and extend findings suggesting that sleep disturbance, excessive daytime sleepiness, and degraded cognitive-motor abilities may be early markers of central nervous system (CNS) involvement in HIV infection.


METHODS
A controlled, cross-sectional, prospective analysis.


METHODS
Clinical research center at a teaching hospital and a military health research center.


METHODS
Twenty-three HIV-positive (mean CD4+ count, 387 +/- 162 x 10(6)/l) and 13 seronegative men who were Naval personnel or participants of the University of California, San Diego HIV Neurobehavioral Research Center.


METHODS
Nocturnal and daytime sleep electroencephalogram, electromyogram, and electrocardiogram. Simple and complex cognitive-motor performance assessed via computerized tasks.


RESULTS
Comparison of sleep parameters based on HIV status, length of time infected, zidovudine use, and CD4+ count indicated that CD4+ T cells > 400 x 10(6)/l were associated with a distortion in nocturnal sleep characterized by increased stages 3 and 4 non-rapid eye movement (i.e., slow-wave) sleep in the latter portion of the night and reduced nocturnal awakenings. HIV-positive patients were no sleepier in the daytime than controls. Cognitive-motor performance revealed deficits in both accuracy and efficiency for HIV-positive patients.


CONCLUSIONS
Asymptomatic HIV-positive patients with CD4+ counts > 400 x 10(6)/l demonstrate a statistically significant increase in slow-wave sleep during the latter portion of the night and less arousability. CD4+ lymphocyte count in the early phases of HIV infection appears to differentiate between various levels of HIV disease progression with respect to certain CNS measurements of nocturnal sleep and cognitive-motor performance. Sleep structure distortion remains one of the earliest and most consistently replicable physiological signs of HIV infection. This distortion may provide a link to immune function, disease progression, and cognitive-motor disability in HIV infection.
Department of Neuropharmacology, Scripps Research Institute, La Jolla, California, USA.
J L
JL
White
D F
DF
Darko
S J
SJ
Brown
J C
JC
Miller
R
R
Hayduk
T
T
Kelly
M M
MM
Mitler
D015526:AIDS Dementia Complex / Q000175:diagnosis* / Q000503:physiopathology; D000328:Adult; D001143:Arousal / Q000502:physiology; D001921:Brain / Q000503:physiopathology; D018791:CD4 Lymphocyte Count; D002940:Circadian Rhythm / Q000502:physiology; D003072:Cognition Disorders / Q000175:diagnosis* / Q000503:physiopathology; D003430:Cross-Sectional Studies; D006679:HIV Seropositivity / Q000175:diagnosis / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D011446:Prospective Studies; D011596:Psychomotor Disorders / Q000175:diagnosis* / Q000503:physiopathology; D011930:Reaction Time / Q000502:physiology; D012894:Sleep Stages / Q000502:physiology; D012893:Sleep Wake Disorders / Q000175:diagnosis* / Q000503:physiopathology; D014851:Wakefulness / Q000502:physiology