Vessel thrombosis or embolism, a large blood vessel occlusion caused cerebral infarction. The cause of cerebral infarction is the result of transient cerebral ischemia and atherosclerosis of the cerebral arteries.
The essential point in the diagnosis of stroke
onset is sudden neurological deficiencies.
Patients often have a history hypertension, diabetes, valvular heart disease or atherosclerosis.
The special neurological signs reflecting vulnerable brain regions.
The overall judgment stroke and cerebral infarction
in the United States, stroke is still the leading cause third fatal stroke although the rate has dropped in the past 30 years. Precise reasons causing decreased incidence of stroke is unclear but probably aware of the risk factors (hypertension, diabetes, increased blood fat, smoking, heart disease, AIDS, drug abuse, addiction alcohol, family history of stroke) and prevention measures, monitoring high risk factors reduces the incidence of stroke. Patients were prone to stroke after stroke times worse.
According to the pathogenesis of stroke is divided into infarction (thrombosis or bridge circuit) and bleeding, the clinical criteria for the diagnosis of this can distinguish two be stressed. Anyway clinically well may have trouble differentiating between the two.
Infarction cerebral
thrombosis or embolism vessel occlusion causes a large blood vessel cerebral infarction. The cause of cerebral infarction is the result of transient cerebral ischemia and atherosclerosis of the cerebral arteries. The neurological deficiencies depends on injuries and cerebral perfusion compensation. Cerebral infarction to a release of the neuropeptide substance and can cause calcium ions into nerve cells increased cell death and neurological deficiency
symptoms and signs
are often sudden onset, then very little progress except by cerebral edema. Clinical examination usually includes examination of heart and heard in the subclavian artery and carotid artery to detect murmurs.
Obstruction in the carotid artery system:
ophthalmic artery obstruction virtually no symptoms in the majority the case for bus systems in the eyeball rich but transient thrombosis of the ophthalmic artery, transient blindness, sudden loss of vision in one eye and short.
obstruction of the artery distal to the junction with the forebrain previous arteries causing weakness and loss of sensation in the legs cortex contralateral hand and sometimes mild weakness particularly original. There may be handling reflexes, disturbances tone hardware on the opposite side and lost the will (lack of initiative) or differentiate themselves airspace. Urinary incontinence is the symptom not uncommon especially if there are behavior disorders style and memory disorders. Cerebral artery before an original party to the junction with the arteries before it was generally well watered compensation from the contralateral artery.
Code of the middle cerebral artery leading to hemiplegia, contralateral sensory loss and the Honorable hemianopia (eg loss of vision in one half of the market to balance the two sides) with two eyes on the injury. If the dominant hemisphere lesions, there are entire aphasia. This clinical features are indistinguishable to the scene of the artery. Switches branches of the carotid artery in the brain can cause swelling and leads to the gloom, drowsiness and coma in severe cases. Switches various branches of the middle cerebral artery and lead to difficulty expressing contralateral hemiplegia and numbness of the hands, face, and sometimes the whole leg. Tac following branches of the middle cerebral artery caused difficulty speaking reception (Wernicke's aphasia) and the Honorable hemianopia. Lesions in the dominant hemisphere do not understand the words and are not affected but there may be confusion condition, operating wearing casualties, spatial disorientation, period.
Code vertebral basilar artery:
Tac posterior cerebral artery can cause thalamus syndrome with symptoms of sensory disturbances side of his face, spontaneous pain and hyperalgesia. With hemianopia often mild and transient co list, hemiplegia.
Depending on location and water damage compensation that the extent of the symptoms vary and there may be other symptoms, including spontaneous and blind athletes reading, the main artery obstruction that separated the oblique branch could lead to hemianopia.
Code at the end of the vertebral artery, beneath the starting spot of the artery spinal cerebellar artery before and after can not clinical symptoms are irrigated by vertebral artery compensated by the other party. If left vertebral artery being born small or there will be severe atherosclerotic clinical symptoms like arterial occlusion unless irrigated live wallpaper from circulatory front cover through Willis polygon. When the small arteries edge between vertebrae separated from clogged arteries will cause hemiplegia and loss of sensation and paralysis contralateral cranial nerves at the level of the injury. Cerebellar artery or the artery after the lower vertebrae before breaking out after cerebellar artery branch under the thorn causing loss of feeling inside even changed the face cord injury IX, X, limb ataxia and Assembly Horner evidence.
Rule two living artery or basilar artery causing coma with small pupils, limbs flaccid paralysis and loss of sensation, nerve damage many kin
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