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Arachnoid granulations (also arachnoid villi, and Pacchionian granulations or bodies) are small outpouchings of the arachnoid mater and subarachnoid space into the dural venous sinuses of the brain. The granulations are thought to mediate the draining of cerebrospinal fluid (CSF) from the subarachnoid space into the venous system .
Arachnoiditis can be difficult to treat and treatment is generally limited to alleviation of pain and other symptoms. [25] While arachnoiditis may not yet be curable with the potential to be life-altering, management including medication, physical therapy , and if appropriate, psychotherapy, can help patients cope with the difficulties it presents.
The main symptoms are headache, vision problems, ringing in the ears, and shoulder pain. [1] [2] Complications may include vision loss. [2] This condition is idiopathic, meaning there is no known cause. Risk factors include being overweight or a recent increase in weight. [1] Tetracycline may also trigger the condition. [2]
CSF returns to the vascular system by entering the dural venous sinuses via arachnoid granulations. [2] These are outpouchings of the arachnoid mater into the venous sinuses around the brain, with valves to ensure one-way drainage. [2] This occurs because of a pressure difference between the arachnoid mater and venous sinuses. [3]
The arachnoid mater (or simply arachnoid) is one of the three meninges, the protective membranes that cover the brain and spinal cord. It is so named because of its resemblance to a spider web . The arachnoid mater is a derivative of the neural crest mesoectoderm in the embryo.
Often, patients can only recognize their prodrome symptoms when they get to the pain phase and look back, Singh says. During a prodrome period, the Mayo Clinic and American Migraine Foundation say ...
Diagram showing the typical location of pain [8] Signs and symptoms of acute pyelonephritis generally develop rapidly over a few hours or a day. It can cause high fever, pain on passing urine, and abdominal pain that radiates along the flank towards the back.
The reigning back-to-back Super Bowl champion Kansas City Chiefs secured their 10th straight playoff berth with five games to spare after beating the Las Vegas Raiders on Black Friday in Week 13.