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Some of these patients are in a state of shock with systolic blood pressure http://www.selleckchem.com/products/Bortezomib.html or gastrointestinal tract is rare. The depth of coma may be assessed by observing the response to standard painful or vocal stimuli (see Table?5). The gag reflex is usually but not invariably preserved. In patients with profound coma, corneal reflexes and oculocephalic ��doll's eye�� reflexes may be abnormal, and there may be abnormalities of conjugate gaze. Corneal and pupillary light reflexes are usually retained. Abnormalities of muscle tone and posture are frequently seen (Molyneux et?al. http://www.selleck.cn/products/gdc-0068.html 1989b; Mabeza et?al. 1995; Waller et?al. 1995; Rey et?al. 1966). These may take the form of muscular hypotonia or, more commonly, of decerebrate or decorticate posturings, which may be intermittent or sustained. In some children, extreme opisthotonos is seen which may misleadingly suggest a diagnosis of tetanus or meningitis. Bruxism (grinding of teeth) is common. Plantar reflexes are sometimes abnormal, and abdominal reflexes are almost invariably absent. The majority of children with cerebral malaria have convulsions. Cerebral malaria was considered to be the cause of convulsions in one-third of children admitted to a Nigerian hospital in 1988 (Asindi et?al. 1993). Convulsions may be generalised or focal, single or recurrent, and unlike febrile convulsions may occur in children of any age (Rey et?al. 1966) and at any level of body temperature (Molyneux http://www.selleckchem.com/products/sch772984.html et?al. 1989b). In some patients (about 25% of children with cerebral malaria in a Kenyan hospital), seizure activity can be demonstrated by electroencephalography in the presence of only minor, if any, convulsive movements of limbs or facial muscles but with jerky eye movements with deviation, excessive salivation and irregular breathing patterns (non-convulsive status epilepticus) (Crawley et?al. 1996); in a study in Malawi, electroencephalography revealed seizures in 7 (19%) of 36 children with cerebral malaria in whom there were no external signs of seizure activity (Birbeck et?al. 2010b). The mean opening pressure at lumbar puncture is 160?mm CSF, which is similar to that in adults, but as the normal range is much lower in children, this means that approximately 80% of children have intracranial pressures above the normal range (Newton et?al. 1991; Waller et?al. 1991). The mechanism and pathophysiological importance of raised intracranial pressure are uncertain. Magnetic resonance imaging reveals evidence of cerebral oedema in many children with cerebral malaria, especially in those with retinopathy, and the presence of cerebral oedema is a strongly adverse prognostic indicator (Potchen et?al.