The pineal gland.
نویسنده
چکیده
منابع مشابه
کلسیفیکاسیون فیزیولوژیک داخل جمجمه‌ای در غده پینه‌آل و شبکه کوروئید در مراجعه‌کنندگان به بخش سی‌تی اسکن بیمارستان امام رضا (ع) بیرجند در سال‌های 1376 لغایت 1385
Background and Aim: Intracranial physiologic calcification is not accompanied by any evidence of disease and has no demonstrable pathological cause. It is often due to calcium deposition in the blood vessels of different structures of the brain. Computed tomography (CT) is the most sensitive means of detection of for this calcification. The aim of this study was the assessment of the intracrani...
متن کاملبررسی ریتم شبانه آنزیم ان - استیل ترانسفراز در غده پینه آل موش صحرائی
Living organisms have multiple biological rhythms. Some of these rhythms are endogenous and some are under the influence of light and dati cydes during 24-hours. Nowadays periodic changes in melatonin secretion from pineal gland and changes in N-acetyl transferase (NAT) activity which influence the melatonin secretion rate has been acknowledged as a basic rhythm. In this study NAT activity in p...
متن کاملComparison of Three Methods for the Estimation of Pineal Gland Volume Using Magnetic Resonance Imaging
Pineal gland is a very important neuroendocrine organ with many physiological functions such as regulating circadian rhythm. Radiologically, the pineal gland volume is clinically important because it is usually difficult to distinguish small pineal tumors via magnetic resonance imaging (MRI). Although many studies have estimated the pineal gland volume using different techniques, to the best of...
متن کاملPostnatal development of the dog pineal gland: electron microscopy.
The ultrastructure of the dog pineal gland from the first postnatal day to the seventh month is described. In the first postnatal stages, pineal parenchyma only shows immature proliferative cells with abundant cytoplasmic glycogen. Nerve fibers are seen in the pineal connective tissue spaces. The differentiation of the dog pineal cell types begins in the first postnatal week. Both pinealocytes ...
متن کاملMelatonin Synthesis in the Pineal Gland: Effect of Light Mediated by the Sympathetic Nervous System.
Exposure to light reduces the ability of the rat pineal gland to synthesize melatonin and decreases the weight of the gland. When the sympathetic nerves to the pineal gland are cut, light no longer has an effect on melatonin synthesis or pineal weight. The response of the gland does not require that the gonads or the pituitary gland be present.
متن کاملDevelopment of the pineal gland: measurement with MR.
PURPOSE To use MR imaging in the analysis of the size of the normal pineal gland in infants, children, and adolescents. METHODS We retrospectively analyzed the size of the pineal gland in 249 patients (129 male and 120 female) aged 2 weeks to 20 years old. The maximum length (L), height (H), and width (W) of the gland were determined from a combination of sagittal, coronal, and axial MR image...
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ورودعنوان ژورنال:
- The New England journal of medicine
دوره 274 17 شماره
صفحات -
تاریخ انتشار 1965