Nystagmus | AHealthyAdvantage The eyes play a critical role in maintaining balance. nystagmus can be a normal physiological response or a result of a pathologicproblem. http://lifewise.ahealthyadvantage.com/topic/topic100587224
Extractions: Rhythmic, oscillating motions of the eyes are called nystagmus. The to-and-fro motion is generally involuntary. Vertical nystagmus occurs much less frequently than horizontal nystagmus and is often, but not necessarily, a sign of serious brain damage. Nystagmus can be a normal physiological response or a result of a pathologic problem. Description The eyes play a critical role in maintaining balance. They are directly connected to other organs of equilibrium, most important of which is the inner ear. Paired structures called the semicircular canals deep in the skull behind the ears sense motion and relay that information to balance control centers in the brain. The eyes send visual information to the same centers. A third set of sensors consists of nerve endings all over the body, particularly in joints, that detect position. All this information is integrated to allow the body to navigate in space and gravity. It is possible to fool this system or to overload it with information so that it malfunctions. A spinning ride at the amusement park is a good way to overload it with information. The system has adapted to the spinning, expects it to go on forever, and carries that momentum for some time after it is over. Nystagmus is the lingering adjustment of the eyes to tracking the world as it revolves around them.
Extractions: The vestibulo-ocular reflex influences vision during natural movement much more than is generally appreciated, and it is capable of subtle and occasional profound influence on vision in aviation. Most physicians or physiologists think of nystagmus, an oculomotor pattern which occurs in certain unnatural motion profiles and in pathologic states, in relation to vestibular stimulation, but nystagmus is probably the least typical form of the vestibulo-ocular reflex in healthy individuals during natural movement. A more common oculomotor response consists of nearly smooth, sinusoidal eye oscillations that almost perfectly compensate for head oscillations that occur during walking, running, or simply shaking one's head, as in signifying "yes" or "no. "For example, in the latter situation as the head turns right, the eye turns left, thereby compensating for the head movement (cf. , Benson 1972). Gresty and Benson (in preparation) describe fairly high-frequency components (in the range 1 to 10 Hz) in angular oscillations of the head during whole-body movement and also in aircraft. It is important to note that the visual system is very poor at tracking Earth-fixed targets at these frequencies if it is unaided by the vestibulo-ocular reflex. Therefore, this reflex plays an important role in stabilizing vision relative to the Earth during many kinds of natural motion. The reader can demonstrate this to himself by holding his head
Article 01 reaction of the striated oculomotor muscles, and many of the normal and pathologicphenomena consistently associated with vestibular nystagmus can be http://www.adeli-suit.com/English/article_01ae.htm
Extractions: A01 Table 02 Article 01 A Novel Approach to the Rehabilitation of Disordered Motor And Speech Functions In Patients with Paralysis of Cerebral Origin I n 1991, a group of clinicians and physiologists developed a novel method for rehabilitative treatment of patients with motor and speech disorders of cerebral origin. More than 200 of the patients treated with this method had been suffering from pediatric cerebral palsy in the residual stage and only two had been paralyzed as a consequence of brain trauma. The theoretical approach described below can only be called "novel" with certain reservations because some of its elements have been in clinical use over many years. B T he device is essentially a system of elastic traction bands built into the patient's suit (or worn by the patients without any suit) and located between supporting elements which include shoulder caps, a broad belt in the lumbar region, kneecaps, and footwear. This device was developed in the late 1960s as a means of preventing adverse effects of weightlessness on cosmonauts such as decalcification of osseous tissue (which loses its strength) and atrophy of skeletal musculature consequent to weightlessness as a result of which the bony skeleton remains unloaded and skeletal muscles experience greatly decreased loads. A device of this type, called the Penguin suit, was used successfully for the first time by G. T. Dobrovolsky, V. N. Volkov, and V. I. Patsaev during their space flight on the Salut orbital station in June 1971.
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Open Directory - Health: Conditions And Diseases: P Aggressive Personality Disorder@ (5); Patellofemoral Disorder@ (8); PathologicNystagmus@ (8); Pathological Gambling@ (60); PCC Deficiency@ (4 http://www.mptdo.com/Health/Conditions_and_Diseases/P/
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Conditions And Diseases: P | Treasure Coast Health Aggressive Personality Disorder@ (5); Patellofemoral Disorder@ (8); PathologicNystagmus@ (8); Pathological Gambling@ (61); PCC Deficiency@ (4 http://treasurecoasthealth.com/treasurecoasthealth.php/Health/Conditions_and_Dis
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