Kot: On average, a cat will sleep for 16 hours a day

Evidence: 41 • authority: 72

The neuroscience of sleep is the study of the neuroscientific and physiological basis of the nature of sleep and its functions. Traditionally, sleep has been studied as part of psychology and medicine. The study of sleep from a neuroscience perspective grew to prominence with advances in technology and the proliferation of neuroscience research from the second half of the twentieth century. The importance of sleep is demonstrated by the fact that every day animals spend hours of their time in sleep, and that sleep deprivation can have disastrous effects ultimately leading to death in animals. For a phenomenon so important, the purposes and mechanisms of sleep are only partially understood,…

Evidence: 41 • authority: 92

Sleep-related metrics that predict training intensity: an exploratory study in women's college athletics.. Background In recent years, the development of wearable monitoring technologies has expanded objective assessments of workload and fatigue, predominantly via heart rate (HR)-based markers (e.g., heart rate variability, resting heart rate). There are also perception-based markers of exertion commonly used in high-performance training settings, such as rating of perceived exertion (RPE) scales. Previous research has shown that these markers do not measure identical but rather complementary aspects of exertion, but limited data exist on the relationships between objective and subjective m…

Evidence: 41 • authority: 90

Diaphragmatic activity during REM sleep in the adult cat. Diaphragmatic electromyograms from five adult cats were studied to determine whether diaphragmatic activity, like central respiratory activity, increases in rapid-eye-movement (REM) sleep. Breaths with inspiratory durations between 250 and 2,000 ms were analyzed. 1) There was a greater slope of the moving time average of diaphragmatic activity in REM than in non-REM (NREM) sleep. These greater slopes occurred whether the route of breathing was through the upper airways or through an endotracheal tube and may have resulted from early recruitment of motor units. 2) Mean diaphragmatic activity was also greater, but other variables (peak…

Evidence: 41 • authority: 90

Discharge patterns of cat pontine brain stem neurons during desynchronized sleep. 1. Discharge pattern has been characterized by autocorrelation analysis of stationary portions of extracellularly recorded discharge trains of cat pontine brain stem neurons during spontaneously occurring desynchronized sleep episodes. 2. Neurons localized to the area implicated in control of the desynchronized phase of sleep, the gigantocellular tegmental field (FTG), show the most phasic or clustered discharge pattern, as evinced by initial peaks in the autocorrelations. At the peak, the FTG population average discharge probability is 3 times that expected had the discharges been evenly distributed over time…

Evidence: 41 • authority: 90

Effects of sleep-promoting factor from human urine on sleep cycle of cats. Slow-wave sleep (SWS) and rapid-eye-movement sleep (REM) were recorded in cats for 32 h a) under control conditions, b) following intraventricular infusions of artificial cerebrospinal fluid (CSF), and c) following infusions of sleep-promoting factor S prepared from human urine (SPU). During the first 12 h after receiving artificial CSF, the cats slept 4.9 +/- 0.2 h in slow-wave sleep (SWS) and 1.4 +/- 0.1 h in REM. Similar values were obtained from the same cats under control conditions. After infusions of SPU, the duration of SWS in the same cats increased to an average of 6.9 +/- 0.5 h with no significant change i…

Evidence: — • authority: 38