Proatlantal intersegmental artery

ähnliche Suchen

Proatlantal intersegmental artery
proatlantal artery
Persistent proatlantal artery
persistent proatalantal intersegmental artery
type II proatlantal artery
Type I proatlantal artery
Proatlantal artery (type I)
Proatlantal artery (type II)
type 2 proatlantal artery

siehe auch

Arteria carotis externa
Arteria carotis interna
Arteria vertebralis
Arteria carotis communis
persistierende karotidobasiläre Anastomosen
Canalis nervi hypoglossi
type 2 proatlantal artery
type 1 proatlantal artery

The proatlantal artery is one of the persistent carotid-vertebrobasilar anastomoses, and can be subdivided into two types depending on its origin:

• type I: (~55%)
  • also known as the proatlantal intersegmental artery
  • arises from the internal carotid artery
  • corresponds to the first segmental artery
• type II: (~40%)
  • corresponds to the second segmental artery
  • arises from the external carotid artery
  • rarely (~5%) it arises from the common carotid artery

Irrespective of their origin, the artery passes through the foramen magnum and joins the vertebral artery. If large then the ipsilateral vertebral artery is small or absent.

Differential diagnosis

It can be easily confused for another persistent carotid-vertebrobasilar anastomosis, the persistent hypoglossal artery but a key differentiator is that proatantal arteries courses through the foramen magnum whereas the persistent hypoglossal artery courses through the hypoglossal canal .

See also

• persistent carotid-vertebrobasilar anastomoses
• primitive arteries in the brain (nmemonic)

Siehe auch:

• Arteria carotis externa
• Arteria carotis interna
• Arteria vertebralis
• Arteria carotis communis
• persistierende karotidobasiläre Anastomosen
• Canalis nervi hypoglossi
• type 2 proatlantal artery
• type 1 proatlantal artery

und weiter:

• persistent proatalantal intersegmental artery
• Embryologie Arteria basilaris