Final answer:
By the mid-seventies, deep sleep may be completely absent as part of the natural aging process. Deep sleep is characterized by high-amplitude, slow delta waves on an EEG and is essential for physical and mental restoration. Factors like changes in sleep structure and hormonal production contribute to its decline with age.
Step-by-step explanation:
Deep sleep, also known as slow-wave sleep, decreases as we age. By the mid-seventies, it is possible for deep sleep to be completely absent. This reduction in deep sleep is a natural part of the aging process.
During deep sleep, the brain waves slow down significantly, and the body undergoes important processes for physical and mental restoration. It is characterized by high-amplitude, slow delta waves on an electroencephalogram (EEG). However, with aging, the amount and intensity of this stage of sleep decrease.
Several factors contribute to the decline in deep sleep with age, including changes in the structure of sleep, reduced production of growth hormone, and increased prevalence of sleep disorders. It is important to prioritize good sleep hygiene and seek medical advice if any sleep issues arise.
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