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During the first year of life, infants spend most of their time sleeping. An infant can go through several periods of change in sleep patterns. These can start at 1 week, occurring weekly or fortnightly, until 8 years of age due to innate and external factors that contribute to sleep. [3]
Early childhood development is the period of rapid physical, psychological and social growth and change that begins before birth and extends into early childhood. [1] While early childhood is not well defined, one source asserts that the early years begin in utero and last until 3 years of age.
A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours.Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment).
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Tummy time is a colloquialism for placing infants in the prone position while awake and supervised to encourage development of the neck and trunk muscles and prevent skull deformations. [ 1 ] [ 2 ] [ 3 ]
This therapy requires 30–60 minutes of exposure to a bright (5000–10 000 lux) white, blue, or natural light at a set time until the circadian clock is aligned with the desired schedule. [ 10 ] [ 27 ] Treatment is initially administered either upon awakening or before sleeping, and if successful may be continued indefinitely or performed ...
A person's chronotype is the propensity for the individual to sleep at a particular time during a 24-hour period. Eveningness (delayed sleep period; most active and alert in the evening) and morningness (advanced sleep period; most active and alert in the morning) are the two extremes with most individuals having some flexibility in the timing ...