Genetics and development of the optic chiasm
نویسندگان
چکیده
منابع مشابه
Genetics and development of the optic chiasm.
In animals with binocular vision, retinal fibers either project across the midline or they remain on the same side of the ventral diencephalon, forming an X-shaped commissure known as the optic chiasm. The correct formation of the optic chiasm during development is essential to establish a fully functional visual system. Visual dysfunction associated with axonal misrouting at the optic chiasm h...
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این پژوهش با هدف "بررسی وضعیت موجود آموزش عالی مجازی در ایران و راههای توسعه و ارتقای آن " و با روش توصیفی-تحلیلی و پیمایشی صورت پذیرفته است. بررسی اسنادو مدارک موجود در زمینه آموزش مجازی نشان داد تعداد دانشجویان و مقاطع تحصیلی و رشته محل های دوره های الکترونیکی چندان مطلوب نبوده و از نظر کیفی نیز وضعیت شاخص خدمات آموزشی اساتید و وضعیت شبکه اینترنت در محیط آموزش مجازی نامطلوب است.
MRI of optic chiasm and optic pathways.
Eight verified lesions of the optic chiasm were examined on 0.5 T magnetic resonance (MR) and GE 9800, 8800 computed tomographic (CT) scanners. Enlargement of the optic chiasm was demonstrated in all cases. There was some change of MR signal compared with brain in all but one case, which had no resemblance to contrast enhancement on CT scans. The signal was specific for hematoma in one case. Ab...
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Primary malignant gliomas of the optic nerve and chiasm are rare, and are usually rapidly fatal in adults. We report a 48-year-old woman with a glioblastoma multiforme arising from the optic chiasm. Following radiotherapy, our patient survived nearly 14 months, which is the longest survival reported in patients with this diagnosis. There have only been four other reports of glioblastoma multifo...
متن کاملGlia, neurons, and axon pathfinding during optic chiasm development.
The importance of vision in the behavior of animals, from invertebrates to primates, has led to a good deal of interest in how projection neurons in the retina make specific connections with targets in the brain. Recent research has focused on the cellular interactions occurring between retinal ganglion cell (RGC) axons and specific glial and neuronal populations in the embryonic brain during f...
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ژورنال
عنوان ژورنال: Frontiers in Bioscience
سال: 2008
ISSN: 1093-9946,1093-4715
DOI: 10.2741/2788