Abdullah Sam

Cerebral infarction resulting from cerebral emboli or from cerebral atherosclerosis and throm­bosis, respectively, cannot be distinguished by the neurologic disorders they produce. Differences between these two causes of infarction do exist, however, in the mode of onset of symptoms and in the general physical evaluation. Causes And Symptoms of Cerebral Infarction The pattern of onset … Read more

A transient ischemic attack (TIA) is caused by ischemia (loss of blood flow.Ischemia in the dominant hemisphere may cause dysphagia, with impairment in the context of speech and, at times, a transient lack of understanding. The symptoms of ischemic attack vary depending upon which area of the brain is ischemic, but there are two main types: those associated … Read more

Both hypotension and hyper­tension have been implicated in the production of cerebral ischemia and infarction. Although cerebral blood flow in the normal person is rela­tively independent of the systemic blood pressure down to levels of 50 to 60 mm. of mercury, it has been suggested that a lesser drop in blood pressure may produce cerebral … Read more

Neuropathology is called the study of disease of nervous system tissue.The brain is exquisitely dependent on its oxygen supply. There is no reserve of oxygen in cerebral tissue to sustain cerebral metabolism during periods of reduced or absent cerebral blood flow. When the brain is acutely and completely deprived of oxygen generally or locally, the … Read more

Autonomic Failure is an uncommon disorder first clearly described by Bradbury and Eggleston in 1925 as idiopathic orthostatic hypotension; it has been more recently emphasized as including more generalized autonomic and nervous system defects. The cause is unknown and the course progressive, disability or death usually occurring within five to ten years after onset. Pathology and … Read more

Spasmodic torticollis has variably been described as a psychogenic disorder, a fragment of dystonia musculorum deformans, a compensatory postural defect in persons with congenital ocular muscle imbalance or defects of the cervical spine or musculature. In some instances it has occurred as part of a wide spectrum of extrapyramidal disorders following encephalitis lethargica. There is … Read more