• Sleep Apnea

    How can you tell if you have Sleep Apnea? Ask your spouse, family, or those around you. Here are some questions to ask: 1. Are you a loud, habitual snorer, disturbing your companion? 2. Do you feel tired and groggy in the morning? 3. Do you experience sleepiness and fatigue during the day? 4. Are you overweight? 5. Have you been observed to choke, gasp, or hold your breath during sleep? If you answered yes to one or more of these questions, you should discuss your symptoms with your physician. Blood oxygen saturation is reduced in the entire body during apnea -- sometimes producing serious irregular heartbeats and significantly reduced oxygen to the brain. Common symptoms of Sleep Apnea are a decreased ability to concentrate; loss of energy and/or fatigue; mild to marked depression; irritability; short temper; morning headaches; forgetfulness; anxiety; and, most frequently, excessive daytime sleepiness. Read More
  • Narcolepsy

    Narcolepsy, and related disorders, is typified by the inability to stay awake. Narcoleptics may suddenly fall asleep while they are engaged in an activity (for example, while waiting for a traffic light to change). Attacks are occasionally brought on by laughing, crying, and other strong emotions in a group setting. This illness often goes undiagnosed for years. Read More
  • Insomnia

    Insomnia is an inability to fall asleep or stay asleep. Attacks are often brought on by stress; worry; depression; another illness; persistent pain; and sleeping pill habits. Evaluating insomnia is important even if the condition seems temporary. Read More
  • Other Sleep Disorders

    Some people suffer from nightmares, night terrors, sleep walking, excessive body jerks, or uncontrollable leg movements. These people often get less than four and one-half hours of restorative sleep -something our bodies need. Even though a person spends ten hours in bed, they may only get two hours of restorative sleep. It is important to have your sleep analyzed if you find yourself waking up more tired than when you went to bed. Read More
  • 1
  • 2
  • 3
  • 4

Clinical Neurologic and Electrophysiologic Correlates of Smooth Pursuit Eye Tracking

PETER G. BERNAD, LARRY SIEVER, SUSUMU SATO, DENNIS MURPHY, and LESLIE BRODY, Bethesda, MD

Smooth pursuit tracking (SPT), a genetically determined function, is a reproducible neurologic marker that is thought to be a measure of involuntary attention. Alteration of SPT can be objectively evaluated and clinically correlated. Using this technique, in a double-blind randomized prospective study, we screened 300 male volunteer college students who subsequently were divided into two groups consisting of the highest accuracy trackers (HAT) and the lowest accuracy trackers (LAT). Ten individuals from HAT and 22 "from LAT (ages 20 to 31) were available for evaluation by clinical neurologic examination, including tests for integration of fine coordination and associated symmetric movements. Each item on the exam was scored from 0 (normal) up to 4 (most severe). An EEG, BAER and VER were obtained as part of the protocol. Seven subjects had abnormalities on one or more of these testings: four in EEGs, four in BAER and two in VER. All except one were in the LAT group. A correlation (p < 0.001) was obtained between low accuracy tracking and total score on the clinical neurologic exam. This approach in looking at a normal population may prove to identify biologic markers which reflect differences in central nervous system functioning that have v neurophysiologic implications.

- April 1981 Neurology (Ny) 31 (2) Page 49