Assertion: vertebral artery dissection | /r/HasProperty | classified by the part of the artery
Facets:
Source sentences:
text: Vertebral artery dissection is further classified as being either traumatic (caused by mechanical trauma to the neck) or spontaneous, and it may also be classified by the part of the artery involved: extracranial (the part outside the skull) and intracranial (the part inside the skull).