blood supply of the second cranial nerve

1. BLOOD SUPPLY OF
THE OPTIC NERVE
DR. DHWANIT KHETWANI

2. BASIC
ANATOMY
OF THE
OPTIC
NERVE

4. • Capillaries derived from RETINAL
ARTERIOLES, which anastomose with
vessels of Prelaminar region.
• Occasionally from the CILIORETINAL
ARTERY, ciliary derived vessel from
prelaminar region
SURFACE NERVE
FIBRE LAYER

5. PRE-LAMINAR
REGION
• Supplied by VESSELS OF CILIARY REGION
• These vessels may be derived from
PERIPAPILLARY CHOROIDAL VESSELS or from
SHORT POSTERIOR CILIARY VESSELS

6. • Supplied by the CILIARY VESSELS
• These vessels are derived from SHORT
POSTERIOR CILIARY ARTERIES and ARTERIAL
CIRCLE OF ZINN-HALLER
LAMINA
CRIBROSA REGION

7. •Supplied by both CILIARY AND RETINAL CIRCULATION
•Ciliary circulation comes from RECURRENT PIAL VESSELS.
•CENTRAL ARTERY OF RETINA provides Centripetal and
Centrifugal branches from the PIAL PLEXUS
RETRO LAMINAR
REGION

8. INTRAORBITAL PART
 SUPPLIED BY TWO SYSTEMS OF VESSELS
PERIAXIAL SYSTEM OF VESSLES
AXIAL SYSTEM OF VESSELS

9. PERIAXIAL SYSTEM OF VESSELS
INTERNAL
CAROTID
ARTERY
LACRIMAL
ARTERY
CENTRAL ARTERY
OF RETINA
SHORT
POSTERIOR
CILIARY
ARTERY
LONG
POSTERIOR
CILIARY
ARTERY
OPHTHALMIC
ARTERY

11. AXIAL SYSTEM OF VESSELS
THE INTRANEURAL
BRANCHES OF THE
CENTRAL RETINAL
ARTERY
CENTRAL COLLATERAL
ARTERIES, WHICH
COME OFF FROM THE
CENTRAL RETINAL
ARTERY
CENTRAL ARTERY OF
THE OPTIC NERVE

13. INTRACANALICULAR PART
PERIAXIAL SYSTEM OF
VESSELS
PIAL PLEXUS , fed by
branches from the
OPHTHALMIC ARTERY

15. INTRACRANIAL PART
 Supplied by
1. PERIAXIAL SYSTEM OF VESSELS
2. PIAL PLEXUS

17. VENOUS DRAINAGE OF THE
OPTIC NERVE
• CENTRAL RETINAL VEIN
OPTIC NERVE HEAD
• PERIPHERAL PIAL PLEXUS
• CENTRAL RETINAL VEIN
ORBITAL PART
• PIAL PLEXUS WHICH ENDS IN ANTERIOR CEREBRAL &
BASAL VEIN
INTRACRANIAL PART

19. THANK YOU