hypnagogic hypersynchrony definition
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- Figure 130.21 Hypnagogic hypersynchrony. This less common but well recognized normal variant of drowsiness is seen in children aged 3. months to 13 years. It consists of paroxysmal bursts (3–5 Hz) of high-voltage (as high as 350 mV) rhythmic waves. Note the normal alpha.
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hypo- A prefix that means beneath or below, as in hypodermic, below the skin. It also means less than normal, as in hypoglycemia, having a level of sugar in the blood that is less than normal.. a stimulus or boost. 3. to stimulate by or as if by administering a hypodermic injection; boost: to hypo a car by installing a bigger engine. [1900–05; by shortening of hypodermic; sense “stimulate” perhaps by association with hype 1; see-o ].
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Sleep Apnea A hypopnea is a decrease in breathing that is not as severe as an apnea. Hypopneas usually occur during sleep and can be defined as as greater than 30% of a normal breath. Like apneas, hypopneas also may be defined as a 3-4% or greater drop in oxygen in the blood. Like apneas, hypopneas usually disrupt the level of sleep.
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hypercapnia hypocapnia - a state in which the level of carbon dioxide in the blood is lower than normal; can result from deep or rapid breathing. acapnia. physical condition, physiological condition, physiological state - the condition or state of the body or bodily functions. hypercapnia, hypercarbia - the physical condition of having the presence of an abnormally high level of carbon dioxide in the circulating blood.
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Hypocapnia Hypocapnia, sometimes incorrectly called acapnia, is a state of reduced carbon dioxide in the blood. Hypocapnia usually results from deep or rapid breathing, known as hyperventilation. Even when severe, hypocapnia is normally well tolerated. However, hypocapnia causes cerebral vasoconstriction, leading to cerebral hypoxia and this can cause transient dizziness, visual disturbances, and anxiety.
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What Is Tachypnea? - Definition, Causes & Treatment Tachypnea is the medical term for rapid and shallow breathing, often confused with hyperventilation, which is breathing that is rapid but deep. Both disorders are caused by a buildup of carbon dioxide in the lungs, which causes a buildup of carbon dioxide in the bloodstream.
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Hyperventilation And Hypoventilation Hyperventilation probably isn’t what you think it is. Hyperventilation is when ventilation exceeds metabolic demands and P a CO 2 drops below 5 kPa. The result will be an alkalosis that affects the function of every protein in the body, producing a confusing spectrum of symptoms with a single cause. Shallow, rapid breathing is probably just that, not necessarily hyperventilation.
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ReviewsPatterns of Hypocapnia on Tilt in Patients with Fibromyalgia, Chronic Fatigue Syndrome, Nonspecific Dizziness, and Neurally Mediated Syncope Patterns of Hypocapnia on Tilt in Patients with Fibromyalgia, Chronic Fatigue Syndrome, Nonspecific Dizziness, and Neurally Mediated Syncope. Received 22 June 2005, Accepted 28 January 2006, Available online 16 December 2015.
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Hygroscopy Hygroscopy is the phenomenon of attracting and holding water molecules from the surrounding environment, which is usually at normal or room temperature. This is achieved through either absorption or adsorption with the absorbing or adsorbing substance becoming physically changed somewhat.
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Carotid Sinus Hypersensitivity Carotid sinus hypersensitivity (CSH) is an exaggerated response to carotid sinus baroreceptor stimulation. At least three-second asystole (cardio-inhibition - the most common form; 70-75% of cases). Lowering of blood pressure by at least 50 mm Hg (vasodepression; 5-10% of cases) without slowing of the heart.
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Background Carotid sinus hypersensitivity (CSH) is an exaggerated response to carotid sinus baroreceptor stimulation. It results in dizziness or syncope from transient diminished cerebral perfusion. Although baroreceptor function usually diminishes with age, some people experience hypersensitive carotid baroreflexes.
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hypnagogic hyp•na•gog•ic. 1. of or pertaining to the period of drowsiness between wakefulness and sleep: hypnagogic hallucinations. Compare hypnopompic. 2. inducing drowsiness.
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Hypnogram From Wikipedia, the free encyclopedia. A hypnogram is a form of polysomnography; it is a graph that represents the stages of sleep as a function of time. It was developed as an easy way to present the recordings of the brain wave activity from an electroencephalogram (EEG) during a period of sleep. It allows the different stages of sleep: rapid eye movement sleep (REM) and non-rapid eye movement sleep (NREM) to be identified during the sleep cycle. NREM sleep can be further classified into NREM stage 1, 2 and 3.
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- Hypo-: Prefix meaning low, under, beneath, down, or below normal, as in hypoglycemia (low blood sugar) and hyposensitivity (undersensitivity).The opposite of hypo-is hyper-.ypo-: Prefix meaning low, under, beneath, down, or below normal, as in hypoglycemia (low blood sugar) and hyposensitivity (undersensitivity).
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hypoxic hypoxia hypoxic hypoxia in Medicine. hypoxic hypoxia n. Hypoxia resulting from a defective mechanism of oxygenation in the lungs, as is caused by a low tension of oxygen, by abnormal pulmonary function, or by a right-to-left shunt in the heart. Also called anoxic anoxia.
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hyperventilation hyperventilation syndrome a complex of symptoms that accompany hypocapnia caused by hyperventilation, including palpitation, a feeling of shortness of breath or air hunger, lightheadedness or giddiness, profuse perspiration, and tingling sensations in the fingertips, face, or toes.
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Hypnagogia Hypnagogia is the experience of the transitional state from wakefulness to sleep: the hypnagogic state of consciousness, during the onset of sleep.In opposition, hypnopompia denotes the onset of wakefulness. The related words from the Greek are agōgos leading, inducing, pompe act of sending, and hypnos sleep.Mental phenomena that occur during this threshold consciousness phase include lucid thought, lucid dreaming, hallucinations, and sleep paralysis.hysiological studies have tended to concentrate on hypnagogia in the strict sense of spontaneous sleep onset experiences. Such experiences are associated especially with stage 1 of NREM sleep, but may also occur with pre-sleep alpha waves.
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hyperglycemic hyperglycemic hyperosmolar nonketotic (HHNK) coma a metabolic derangement in which there is an abnormally high serum glucose level without ketoacidosis.
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Hypnic jerk A study at the University of Colorado has suggested that a hypnic jerk could be an archaic reflex to the brain's misinterpretation of muscle relaxation with the onset of sleep as a signal that a sleeping primate is falling out of a tree.
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hyperphagia hyperphagia (hī´pərfā´jēə) , n a disorder marked by an abnormal appetite and excessive ingestion of food, even to the point of gastric pain and vomiting. It is associated with the malfunction of the hypothalamus and is often linked to conditions such as Kleine-Levin syndrome and central nervous disorders.yperphagia (hī´pərfā´jēə) , n a disorder marked by an abnormal appetite and excessive ingestion of food, even to the point of gastric pain and vomiting. It is associated with the malfunction of the hypothalamus and is often linked to conditions such as Kleine-Levin syndrome and central nervous disorders.
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- Definition of hypo-. 1  1 : under : beneath : down hypoblast hypodermic. 2  2 : less than normal or normally hypesthesia hypotension. 3  3 : in a lower state of oxidation : in a low and usually the lowest position in a series of compounds hypochlorous acid hypoxanthine.
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The Cell Organelles Function The cytoskeleton provides support and movement for a cell and its organelles. Organelles can be from place to place in a cell by attaching to microtubule track ways. The various shapes of cells are controlled by the cytoskeleton. Microtubules are involved in cell division.
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- Figure 130.21 Hypnagogic hypersynchrony. months to 13 years. It consists of paroxysmal bursts (3–5 Hz) of high-voltage (as high as 350 mV) rhythmic waves. rhythm in the ﬁrst two-thirds of the sample, which precedes drowsiness.
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hypo- hypo-. A prefix that means beneath or below, as in hypodermic, below the skin. It also means less than normal, as in hypoglycemia, having a level of sugar in the blood that is less than normal.Translations. prefix that means beneath or below, as in hypodermic, below the skin. It also means less than normal, as in hypoglycemia, having a level of sugar in the blood that is less than normal.
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hypo- A prefix that means beneath or below, as in hypodermic, below the skin. It also means less than normal, as in hypoglycemia, having a level of sugar in the blood that is less than normal. Translations
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Tachypnea Hyperpnea, on the other hand, is defined as breathing more rapid and deep than breathing at rest. Others give another classification: tachypnea is as any rapid breathing, hyperventilation is increased rate of breathing at rest, hyperpnea is an increase in breathing that is appropriately proportional to an increase in metabolic rate.