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Vertebrobasilar insufficiency (VBI) describes a temporary set of symptoms due to decreased blood flow in the posterior circulation of the brain. The posterior circulation supplies the medulla , pons , midbrain , cerebellum and (in 70-80% of people) supplies the posterior cerebellar artery to the thalamus and occipital cortex . [ 1 ]
The phenomenon of flow reversal is called subclavian steal or subclavian steal phenomenon, regardless of whether signs or symptoms are present. [1] In this condition, the affected arm may receive blood supply flowing in a retrograde direction down the vertebral artery, potentially compromising the vertebrobasilar circulation.
435.3 Vertebrobasilar artery syndrome; 435.9 Transient ischemic attack, unspec. 436 Acute but ill-defined cerebrovascular disease; 437 Other and ill-defined cerebrovascular disease. 437.0 Cerebral atherosclerosis; 437.1 Other generalized ischemic cerebrovascular disease; 437.2 Hypertensive encephalopathy; 437.3 Cerebral aneurysm nonruptured ...
Other causes include Ménière's disease (12%), superior canal dehiscence syndrome, vestibular neuritis, and visual vertigo. [ 16 ] [ 17 ] Any cause of inflammation such as common cold , influenza , and bacterial infections may cause transient vertigo if it involves the inner ear, as may chemical insults (e.g., aminoglycosides ) [ 18 ] or ...
In the ICD-9 system, a disease may have a cause listed in one chapter, and its manifestations listed in another. For example, Tuberculous meningitis is caused by a bacterial infection, and is therefore listed in Chapter 1, Infectious and parasitic diseases .
A rare but severe complication of this disease is vertebrobasilar insufficiency. [7] This is a result of the vertebral artery becoming occluded as it passes up in the transverse foramen. The spinal joints become stiff in cervical spondylosis. Thus the chondrocytes which maintain the disc become deprived of nutrition and die.
Dementia is a complicated condition, and researchers are still unpacking a lot about its underlying causes. However, there are some things doctors generally agree on when it comes to prevention ...
It is most frequently caused by lesions such as vascular disease and tumors involving the dorsal pons. Structures affected by the lesion are the dorsal pons (pontine tegmentum) which comprises paramedian pontine reticular formation (PPRF), nuclei of cranial nerves VI and VII , corticospinal tract , medial lemniscus , and the medial longitudinal ...