"fragmented sleep" is a correct and usable phrase in written English.
You could use it to describe a situation where somebody experiences difficulty sleeping, perhaps due to frequent disturbances, or a sleeping pattern that is interrupted. For example: "John suffered from fragmented sleep, caused by his noisy neighbors."
Their sleep pattern was meant to mimic the fragmented sleep of elderly people.
It's normal, it's healthy; we have shorter, lighter, more fragmented sleep".
Fragmented sleep, he found, led to severe impairments the next day in pain pathways.
With fragmented sleep comes poor sleep quality, so the chances are that we'll experience more potentially disturbing sleep imagery".
Timothy Roehrs, director of research at the sleep disorders research center at Henry Ford Hospital in Detroit, also found that healthy young people became exquisitely sensitive to pain after a night of fragmented sleep.
Comparing the second and third groups allowed Dr. Smith to tease apart the causes of the problems that arise from fragmented sleep: were they because of the short total sleep time, or because of the disrupted nature of the sleep?
Growth hormone is produced during slow-wave sleep, and its secretion may be interrupted by fragmented sleep.
Moreover, other microstructural aspects of sleep were modified with high frequency of arousals and alpha-K complex reported, both indicators of fragmented sleep.
Sleep perturbations including fragmented sleep with frequent night-time awakenings and daytime naps are common in patients with Alzheimer's disease (AD), and these daily disruptions are a major factor for institutionalization.
The causes of comorbidity in obstructive sleep apnea-hypopnea syndrome in children are not yet well known and can include blood gasometric anomalies, fragmented sleep, and local and systemic inflammation, modulated by genetic, environmental and ethnic factors.
Previous studies have demonstrated that breastfed newborns spend more time awake than bottle‐fed newborns, breastfeeding mothers have more fragmented sleep than bottle‐feeding mothers, and mother‐newborn sleeping arrangements may affect the sleep/wake pattern of mother‐newborn pairs.
