external vertebral plexuses - определение. Что такое external vertebral plexuses
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Что (кто) такое external vertebral plexuses - определение

External vertebral plexuses; Posterior external plexuses; Anterior external vertebral plexuses; Plexus venosi vertebrales externi; Posterior internal plexuses; External vertebral venous plexus

External vertebral venous plexuses         
The external vertebral venous plexuses (extraspinal veins) best marked in the cervical region, consist of anterior and posterior plexuses which anastomose freely with each other.
Vertebral artery dissection         
  • Magnetic resonance angiogram of the neck vessels in a person with Ehlers-Danlos syndrome type IV; it shows a dissection of the left internal carotid artery, dissection of both vertebral arteries in their V1 and V2 segments and a dissection of the middle and distal third of the right subclavian artery. Such striking episodes of dissection are typical for this "vascular" subtype of Ehlers-Danlos syndrome.
  • Aspirin (tablets pictured) is commonly used after stroke. In vertebral artery dissection it appears as effective as anticoagulation with warfarin.
  • A reconstruction of the vertebral arteries from a CT scan, seen from the front. From the bottom, V1 is from the subclavian artery to the foramina, V2 is from the foramina to the second vertebra, V3 is between the foramina until entry into the skull, and V4 is inside the skull embedded in the [[dura mater]]. They merge into the basilar artery, which then divides into the [[posterior cerebral artery]].
TRAUMATIC OR NONTRAUMATIC VERTEBRAL ARTERY RUPTURE
Vertebral dissection; Dissection of vertebral artery; Vertebrobasilar artery stroke; VA dissection
Vertebral artery dissection (VAD) is a flap-like tear of the inner lining of the vertebral artery, which is located in the neck and supplies blood to the brain. After the tear, blood enters the arterial wall and forms a blood clot, thickening the artery wall and often impeding blood flow.
External sorting         
CLASS OF SORTING ALGORITHMS THAT CAN HANDLE MASSIVE AMOUNTS OF DATA
External sort; External merge; External Sorting; On-disk merge; On disk merge
External sorting is a class of sorting algorithms that can handle massive amounts of data. External sorting is required when the data being sorted do not fit into the main memory of a computing device (usually RAM) and instead they must reside in the slower external memory, usually a disk drive.

Википедия

External vertebral venous plexuses

The external vertebral venous plexuses (extraspinal veins) best marked in the cervical region, consist of anterior and posterior plexuses which anastomose freely with each other.

  • The anterior external plexuses lie in front of the bodies of the vertebræ, communicate with the basivertebral and intervertebral veins, and receive tributaries from the vertebral bodies.
  • The posterior external plexuses are placed partly on the posterior surfaces of the vertebral arches and their processes, and partly between the deep dorsal muscles.

They are best developed in the cervical region, and there anastomose with the vertebral, occipital, and deep cervical veins.