Biomedical subjects

S A Keenan

Publications and source records attributed to S A Keenan.

2 recordsLinked to original sources

PubMed1999

Normal human sleep.

Human sleep is an integral part of the basic rest-activity cycle that is found in all life forms. Comprised of cycling episodes of non-REM (NREM) and REM sleep, sleep can be measured and quantified by electrophysiologic, physiologic, and behavioral indices. Physiologic homeostasis changes markedly between wakefulness, NREM sleep, and REM sleep; moreover, many interacting factors determine sleep organization and sleep quality in a given individual. For the health practitioner, basic knowledge of sleep physiology and sleep modifiers is essential for the treatment of many clinical problems that are directly or indirectly related to phenomena occurring during sleep.

Aging↗

PubMed1992

Polysomnography: technical aspects in adolescents and adults.

Polysomnography is a complex procedure that should be performed by a trained technologist. The routine clinical polysomnogram includes the monitoring of EEG, electro-oculography, electromyography, effort of breathing and airflow, oxygen saturation electrocardiography, and body position. Other more specialized studies may include parameters such as endoesophageal pressure, endoesophageal pH, or penile circumference change. Special considerations to keep in mind when studying adolescents include attention to psychological, social, and technical issues. Polysomnography is an essential tool in the formulation of diagnosis for sleep disorders patients and in the enhancement of our understanding of sleep and its disorders.

Adolescent↗