Sleep research has been a personal area of interest ever since I took a course in it during my undergraduate days. Dr. Raymond Rainwater at the State University of New York in Oneonta taught the course and I dedicate this article to him. After graduation, I moved to Houston Texas to work as a Sleep Lab Technician at Baylor College of Medicine where both clinical evaluation and sleep research were conducted. It was an eye opening experience, which further reinforced my career path!
Sleep Physiology
It's complex! First, a look at brain activity. Each night the brain goes through 4-5, 90-120 minute long sleep cycles. Within each cycle, the brain waves change in frequency, classified as stages of sleep.
What makes us sleep?
Circadian rhythms generated by the suprechiasmic nuclei (SCN) located in the brain. The SCN serves as an internal “biological clock” that controls body temperature, levels of alertness and levels of activity. During sleep, the SCN signals the pineal gland to release melatonin and the pituitary gland it release growth hormone. Melatonin increases sleepiness and relaxation. Several other important hormones are released during sleep such as ADH, Oxytocin, and Prolactin.
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The release of hormones is one of the ways sleep is maintains over-all health and wellness! Across a life span sleep changes occur. Infants spend a lot of time sleeping. As we age sleep duration and time spent in REM sleep decreases.
The Sleep Prescription for Older Adults
Quantity versus the quality of sleep.
- Sleep quantity
- Seven to nine hours per night
- Sleep “quality” or “efficiency” a measure based on the number of times one wakes up during sleep
- You fall asleep in 30 minutes or less
- You seasonally through the night with no more than one awakening
- if you wake up, you drift back to sleep within 20 minutes
Good sleep practices
Go to bed the same time every night. Control your environment by minimizing light, noise and maximizing comfort. Do not have any caffeine containing food or drinks within several hours of your bedtime. Soothing music that lulls you to sleep and turns off automatically may help. Other strategies include relaxation exercises, meditation or restorative yoga just before getting into bed. A glass of red wine may help you relax but excessive alcohol will disrupt sleep.
Try restorative yoga