{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

9 - sleep and biological rhythms

9 - sleep and biological rhythms - A Physiological and...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
A Physiological and Behavioral Description of Sleep 18:17 Stages of Sleep Electromyogram (EMG): An electrical potential recorded from an electrode  placed on or in a muscle o Electro-oculogram (EOG): An electrical potential from the eyes, recorded  by means of electrodes placed on the skin around them Detects eye movements Alpha activity: Smooth electrical activity of 8-12 Hz recorded from the brain o Generally associated with a state of relaxation  o Beta activity: Irregular electrical activity of 13-30 Hz recorded from the  brain Generally associated with a state of arousal Theta activity: EEG activity of 3.5-7.5 Hz that occurs intermittently during early  stages of slow-wave sleep and REM sleep Delta activity: Regular, synchronous electrical activity of less than 4 Hz  recorded from the brain o Occurs during the deepest stages of slow-wave sleep o Slow-wave sleep: Non-REM sleep, characterized by synchronized EEG  activity during its deeper stages  Down state: A period of inhibition during a slow oscillation during slow-wave  sleep o Neurons in the neocortex are silent and resting o Up state: A period of excitation during a slow oscillation during slow-wave  sleep Neurons in the neocortex briefly fire at a high rate REM sleep: A period of desynchronized EEG activity during sleep, at which  time dreaming, rapid eye movements, and muscular paralysis occur o Paradoxical sleep Non-REM sleep: All stages of sleep except REM sleep Mental Activity During Sleep
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Disorders of Sleep 18:17 Insomnia
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern