The knowledge of brain syndromes is essential for stroke physicians and neurologists. There are various subsets of brain stem syndromes, for example, dorsolateral medullary. Gates the geelong hospital, barwon health, geelong, victoria, australia the rule of 4 is a simple method developed to help students of neurology to remember the anatomy of the brainstem and thus the features of the various brainstem vascular syndromes. Brain stem stroke can also cause double vision, slurred speech and. Dieterich m 1993 skew deviation with ocular torsion. A person may have vertigo, dizziness and severe imbalance without the hallmark of most strokes weakness on one side of the body.
Any information contained in this pdf file is automatically generated from digital material. If ct is negative it is important to proceed to mri with dwi in a timely fashion in patients presenting with brainstem syndromes to detect small acute infarcts and the full extent of a brainstem ischaemia3. Discuss how neuro assessment tools can help determine the location of the lesion. Any information contained in this pdf file is automatically generated from digital. Brainstem stroke syndromes radiology reference article. Primary case is a brainstem hemorrhagic or ischemic stroke supportive cares include. The symptoms of vertigo dizziness or imbalance usually occur together. Discuss clinical clues that can be used to differentiate between stroke and stroke mimics. Pdf stroke syndromes and clinical management researchgate. Lacunar stroke syndromes sensorimotor stroke can arise from infarcts at the junction between the thalamus and the internal capsule as the name implies, the symptoms consist of weakness and sensory loss with no visual field deficit, aphasia, neglect or other symptoms.
Radiological findings in brainstem infarction syndromes. P ersonal v iewpoint c linical t the rule of 4 of the. Ct has poor sensitivity for acute posterior fossa ischaemic stroke. Other neurological manifestations will vary depending upon the side of the stroke lesion and whether the stroke occurs in the cerebral hemispheres or the brainstem. The major stroke syndromes and their associated signs and symptoms. The main eponymous brainstem infarction syndromes were named prior to the advent of. Review the major arteries of the brain and differentiate large vessel vs. Posterior circulation stroke is associated with some interesting syndromes. The impairments associated with a stroke exhibit a wide diversity of clinical signs and symptoms. Less common etiologies for brainstem syndromes would include infectious diseases especially some meningitides that center on the base of the brain like tuberculosis.
Lateral medullary syndrome wallenbergs syndrome a case report. It is the most typical posterior circulation ischemic stroke syndrome in clinical. Stroke school stroke network of southeastern ontario. Anterior circulation stroke right mca syndrome hemiparesis or hemiplegia of lower half of contralateral face hemiparesis or hemiplegia of contralateral upper and lower extremity sensory loss of contralateral face, arm and leg left hemineglect right gaze preference.
Review the major divisions of the brain and the describe the functions of each section. The red line indicates the level being described is the medulla in this syndrome, c ventral view of the brainstem level affected in medial medullary syndrome. Brainstem stroke syndromes, also known as crossed brainstem syndromes, refer to a group of syndromes that occur secondary to lesions, most commonly infarcts, of the brainstem. A brainstem stroke syndrome falls under the broader category of stroke syndromes, or specific symptoms caused by vascular injury to an area of brain as the.
Cerebral herniation syndromes cerebral herniation is caused by a number of factors that cause a mass effect within the skull and increase the intracranial pressure. Posterior circulation stroke american heart association. Brain stem strokes can have complex symptoms, and they can be difficult to diagnose. We gave a short overview of the most important stroke syndromes in the clinical. The most common presentation of a stroke patient requiring rehabilitation is contralateral hemiparesis or hemiplegia. Cerebrovascular disorders represent the third leading cause of mortality and the second major cause of longterm disability in north america delaney, 1993. Introduce the major stroke syndromes and their associated signs and symptoms. These are typically focal lesions due to stroke, neoplasm, or multiple sclerosis.
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