blood supply of the optic nerve
TRANSCRIPT
BLOOD SUPPLY OF THE OPTIC NERVEDR. DHWANIT KHETWANI
BASIC ANATOMY OF THE OPTIC NERVE
• 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
PRE-LAMINAR REGION
• Supplied by VESSELS OF CILIARY REGION• These vessels may be derived from
PERIPAPILLARY CHOROIDAL VESSELS or from SHORT POSTERIOR CILIARY VESSELS
• Supplied by the CILIARY VESSELS
• These vessels are derived from SHORT POSTERIOR CILIARY ARTERIES and ARTERIAL CIRCLE OF ZINN-HALLER
LAMINA CRIBROSA REGION
• 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
INTRAORBITAL PART SUPPLIED BY TWO SYSTEMS OF VESSELS
PERIAXIAL SYSTEM OF VESSLES
AXIAL SYSTEM OF VESSELS
PERIAXIAL SYSTEM OF VESSELS
INTERNAL CAROTID ARTERY
LACRIMAL ARTERY
CENTRAL ARTERY OF
RETINA
SHORT POSTERIOR
CILIARY ARTERY
LONG POSTERIOR CILIARY ARTERY
OPHTHALMIC ARTERY
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
INTRACANALICULAR PART
PERIAXIAL SYSTEM OF VESSELS
PIAL PLEXUS , fed by branches
from the OPHTHALMIC
ARTERY
INTRACRANIAL PART Supplied by1. PERIAXIAL SYSTEM OF VESSELS2. PIAL PLEXUS
PIAL PLEXUS(INTRACRANIAL PART)
RECURRENT BR. OF OPHTHALMIC
ARTERY
BR. OF ANTERIOR CEREBRAL ARTERY
RECURRENT BRANCH OF
ANT.SUP.HYPOPHYSEA
L ARTERY
PERIAXIAL SYSTEM OF VESSELS
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
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