четверг, 8 января 2009 г.

behavioural reactions, referred

behavioural reactions, referred on change of conditions of environment, and physiological reactions, including independent (a vascular tonus, a diaphoresis, a dyspnea), endocrine () and activation of sympathetic nervous system. Physiological reactions lead to change of rate of metabolic processes and recycling of the reserved power substances cheap zanaflex which are the basic source of a thermogenesis at long influence of a cold. The serotonin stimulates thermoreceptors, Noradrenalinum makes on their brake impact, and cholinergic mechanisms, apparently, carry out communication between thermosensitive and neurones. The pharmacology and thermoregulation physiology are in detail surveyed in other works [66, 67]. Damages of a hypothalamus can cause in the person gipo-or a hyperthermia at the expense of disturbance of mechanisms of a heat production or a thermolysis or change of an adjusting point [1]. The last leads to change of a body temperature irrespective of themes - environment whereas changes of a heat production or a thermolysis demand that the surrounding temperature was more low or above a body temperature accordingly, the Constant hypothermia seldom, but nevertheless can meet at damages of a forward hypothalamus, being a consequence or chronic shift of an adjusting point, or disturbance of mechanisms . The hypothermia or attacks of depression of a body temperature was observed also , and for some patients has been diagnosed . Often in them find out a corpus collosum agenesia. The constant hyperthermia caused by a lesion of neurones, meets only as self-limited process: usually after a craniotomy, a trauma or a hemorrhage in a forward hypothalamus or III ventricle. At such patients of disturbance from cardiovascular system appear it is disproportionate the small. The subthalamic hyperthermia proceeds no more than 2 after acute influence. a hyperthermia - the rare condition shown by attacks of a tremendous fever, a fever and sometimes other independent changes.
This diagnosis can be put only at an exception of other reasons of an alternating fever. Anatomic data about disturbance localisation in such cases are rather limited, the Most frequent neurogenic disturbance of a thermoregulation at the person is the relative poikilothermism (fluctuations of a body temperature within more 2 °, coinciding with changes of the surrounding temperature). The poikilothermism is caused by a defunctionalization final ways to a back hypothalamus and a mesencephalon and defines level of temperature discomfort, regulation of behaviour and activity independent mechanisms. Patients with a poikilothermism do not realise disturbance of temperature balance and do not find out discomfort signs at temperature influences. As the surrounding temperature usually below a body temperature, at the majority of patients becomes perceptible a hypothermia. At the heart of this disorder bilateral disturbances should lay. The moderate functional poikilothermism becomes perceptible at newborns and at senile age, and also at patients with a nervous anorexia. LESION OF OTHER AREAS OF THE CENTRAL NERVOUS SYSTEM DISEASES OF THE GLAND The pathology tegretol causing joint pain the glands, causing endocrine disturbances, includes a hypoplasia or an aplasia - the rare condition often accompanied by premature puberty, and also epiphysis tumours. The tumours of an epiphysis making less 1 from all intracranial neoplasms, share on three types: pinealomy-parenhimatoznye the tumours making 20 from neoplasms of an epiphysis, the glial tumours making 25 , and germinomas on which share all other cases have. Germinomas name also ectopic pinealomas (if they settle down out of an epiphysis) or teratomas [68]. They are formed of germinal sex cells which in norm migrate from a vitelline bag in a sexual crest, but can have and unusual localisation, including in a mediastinum and on an average line hypothalamus areas. These neoplasms find out histological and functional similarity to tumours from sex cells of ovaries or spermaries. Tumours of this type III ventricle and a bottom of a hypothalamus also are accompanied by a characteristic triad of signs: an optic nerve atrophy, and a hypogonadism. Tumour growth can lead also to a prelum of a waterpipe of a brain, causing an internal hydrocephaly with characteristic headaches for it, vomiting, a papilledema and consciousness disturbance. Can be observed also syndrome ( a look paralysis upwards) owing to pressure on top and disturbance of a gait owing to pressure upon a cerebellum or a brainstem. Thermoregulation disturbances concern less frequent implications, or an anorexia, caused by disturbance of functional integrity of a hypothalamus. In rare instances tumours extend on a Turkish saddle, imitating a primary neoplasm of a pituitary body.

Комментариев нет: