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Central hypoventilation syndrome. Central hypoventilation syndrome ( CHS) is a sleep-related breathing disorder that causes ineffective breathing, apnea, or respiratory arrest during sleep (and during wakefulness in severe cases). CHS can either be congenital (CCHS) or acquired (ACHS) later in life. The condition can be fatal if untreated.
Two months old. Physical development. Typically grows at a similar rate to the previous month, usually growing between 1 and 1.5 inches (2.5 and 3.8 cm) and gaining about 2 pounds (910 g). Resting heart rate is usually between 80 and 160 beats per minute, and it typically stays within that range until the infant is about one year old.
Moro reflex while sleeping. The Moro reflex is an infantile reflex that develops between 28 and 32 weeks of gestation and disappears at 3–6 months of age. It is a response to a sudden loss of support and involves three distinct components: [1] spreading out the arms ( abduction) pulling the arms in ( adduction)
Primitive reflexes. Primitive reflexes are reflex actions originating in the central nervous system that are exhibited by normal infants, but not neurologically intact adults, in response to particular stimuli. These reflexes are suppressed by the development of the frontal lobes as a child transitions normally into child development. [1]
A comparison of an awake, resting (with activity), normal EEG with a hypsarrhythmia EEG. The hypsarrhythmia EEG is from a 4-month old girl with cryptogenic West syndrome. In it high amplitude waves and spikes are present, randomly appearing and with no topographical distribution identified; also, there is no frequency nor amplitude gradient ...
The Bayley Scales of Infant and Toddler Development (version 4 was released September 2019) is a standard series of measurements originally developed by psychologist Nancy Bayley used primarily to assess the development of infants and toddlers, ages 1–42 months. [1] This measure consists of a series of developmental play tasks and takes ...
A minimally conscious state or MCS is a disorder of consciousness distinct from persistent vegetative state and locked-in syndrome. Unlike persistent vegetative state, patients with MCS have partial preservation of conscious awareness. [1] MCS is a relatively new category of disorders of consciousness. The natural history and longer term ...
This results in smaller retinal images for infants. The vision of infants under one month of age ranges from 6/240 to 6/60 (20/800 to 20/200). By two months, visual acuity improves to 6/45 (20/150). By four months, acuity improves by a factor of 2 – calculated to be 6/18 (20/60) vision.