Page 176 - Edited - Webster HEAD AND NECK - part 1

BOUNDARIES OF THE ORBIT 4

LATERAL ORBITAL PLATE MEDIAL
OF FRONTAL LESSER WING OF
SPHENOID
(A)“PRIMITIVE”
ORBIT IN OPTIC (B) WE ALREADY
CONTINUITY CANAL KNOW THAT (1) there is
WITH TEMPORAL a defect above the
FOSSA maxilla-the INFERIOR
DEFECT ORBITAL FISSURE (ii)
that the OPTIC CANAL
ETHMOID DEFECT
ZYGOMA TEMPORA passes through the root
– forms a L FOSSA & ETHMOID (close the body) of THE
vertical I.T. FOSSA LESSER WING OF THE
bar SPHENOID. THE BODY
of the sphenoid, to which
the lesser wing is attached,

ORBITAL MAXILLA is behind the ethmoid

MARGIN I.T. FOSSA = INFRATEMPORAL INFERIOR ORBITAL MAXILLA (SHEETS)
FISSURE [relevant of
FOSSA defect in (A)]

C) THE INFERIOR GREATER WING OF SUPERIOR SUPERIOR (c) COMPLETE ORBIT
SPHENOID
ORBITAL FISSURE is a ORBITAL FISSURE ORBITAL FISSURE
defect between the maxilla [relevant of defect in HN 143
below the GREATER (A)]
WINGS OF SPHENOID FRONTAL LESSER WING
above, leading to the infra OF SPHENOID
temporal fossa. Between OPTIC CANAL
THE GREATER AND GREATER
LESSER WING OF THE WING OF ETHMOID
SPHENOID IS THE SPHENOID
SUPERIOR ORBITAL
FISSURE → MIDDLE
CRANIAL FOSSA ZYGOMA
(SHEETS 76,77)

Inferior MAXILLA
ORBITAL
FUNCTIONS OF ORBIT
(i) to contain EYEBALL & associated structures (the ADNEXA OCULL);(ii) to conduct OPTIC NERVE to MIDDLE CRANIAL FOSSA (exit :
OPTIV CANAL);(iii) conduct nerve to EXTRAOCCULAR & INTRAOCULAR MUSCLES (SUPERIOR ORBITAL FISSURE); (iv) to conduct
OPHTHALMIC ARTERY (OPTIC CANAL) & OPHTHALMIC VEINS (SUPERIOR ORBITAL FISSURE); (v) to conduct TRIGEMINAL
NERVE DIVISION V 1 &V2 (ophthalmic, maxillary) to face, external nose, & scalp.