optic chiasm การใช้

• The major example in the human brain is the Optic chiasm.
• Several important structures are located adjacent to the optic chiasm.
• Gliomas of the optic chiasm are usually derived from astrocytes.
• Craniopharyngiomas generally approach the optic chiasm from behind and above.
• These axons form the optic nerve, optic chiasm, and optic tract.
• The optic chiasm is formed by the union of the two optic nerves.
• Tuberculum sellae and sphenoid planum meningiomas usually compress the optic chiasm from below.
• From the optic disc visual information travels through the optic nerve and into the optic chiasm.
• Optic gliomas are usually pilocytic tumors, and can involve the optic nerve or optic chiasm.
• Bitemporal hemianopsia most commonly occurs as a result of tumors located at the mid-optic chiasm.
• It is recommended for patients with tumors that don t come into contact with the optic chiasm.
• Visual impairment is a common presenting symptom, due to compression or invasion of the optic chiasm.
• In neurology, the optic chiasm is named for the letter Chi because of its ?-shape.
• The most common tumors in this region are craniopharyngiomas, pituitary adenomas, meningiomas, and optic chiasm gliomas.
• The neurons in the optic nerve decussate in the optic chiasm with some crossing to the contralateral optic nerve tract.
• Lesions or damage to parts of the brain that cause visual field defects usually occur posterior to the optic chiasm.
• If a cyst adds pressure to the optic chiasm, it may cause visual disturbances, pituitary dysfunction, and headaches.
• The optic chiasm, which is crucial to the visual system, was discovered around 100 C . E . by Marinus.
• This can result in compression of the optic chiasm, which lies on top of the pituitary, enveloping the pituitary stalk.
• If the lesion is in close proximity to the optic nerves or optic chiasm, a visual field examination should be performed.