====== Tortuosity ======
 
Tortuosity is a property of curve being tortuous (twisted; having many turns). There have been several attempts to quantify this property. 

see [[Middle cerebral artery tortuosity]].

see [[Tortuous vertebral artery]].

[[Blood vessel]] [[tortuosity]] may play an important role in the development of vessel abnormalities such as [[aneurysm]]s.

The greater intracranial arterial tortuosity in [[Korea]]ns with vascular risk factors may in part explain the higher prevalence of  intracranial artery atherosclerosis (ICAS) in [[Asia]]ns than in whites. Further studies are required to prove these preliminary findings
((Kim BJ, Lee KM, Lee SH, Kim HG, Kim EJ, Heo SH, Chang DI, Kim JS. Ethnic
Differences in Intracranial Artery Tortuosity: A Possible Reason for Different
Locations of Cerebral Atherosclerosis. J Stroke. 2018 Jan;20(1):140-141. doi:
10.5853/jos.2017.02915. Epub 2018 Jan 31. PubMed PMID: 29402073; PubMed Central
PMCID: PMC5836575.
)).

===== Optic nerve tortuosity =====
[[Optic nerve tortuosity]]