Download kumc 30 orbit student

ORBIT
Bones of Orbit: Roof

Bones:
Frontal bone.
Lesser wings of
sphenoid.

Related to:
Frontal cerebral
lobes.

Special features:
Fossa for lacrimal
gland.
Bones of Orbit: Floor

Bones:
Maxilla.
Zygomatic.

Related to:
Maxillary sinus.

Special features:
Infraorbital groove
and canal:
Infraorbital nerve.
Infraorbital artery.
Bones of Orbit: Medial Wall

Bones:
Ethmoid.
Lacrimal.
Frontal.
Sphenoid.

Related to:
Ethmoid air cells.
Sphenoid sinus.
Nasal cavity.
Bones of Orbit: Medial Wall

Special features:
Fossa for lacrimal
sac.
Opening for
nasolacrimal canal.
Bones of Orbit: Lateral Wall

Bones:
Zygomatic.
Greater wing of
sphenoid.
Frontal.

Related to:
Temporal fossa.
Eye

External features:
Conjunctiva.
Eyelids:
Tarsal plates.
Tarsal glands.
Lacrimal apparatus:
Lacrimal papilla and puncta.
Lacrimal canaliculi and sac.
Nasolacrimal duct.
Openings into Orbit

Superior orbital fissure:
Cranial nerves:
III.
IV.
V-1 (ophthalmic branch).
Frontal.
Lacrimal.
Nasociliary.
VI.
Superior ophthalmic vein.
Openings into Orbit

Optic canal:
CN II.
Ophthalmic artery.

Anterior and posterior ethmoidal foramina:
Openings into Orbit

Inferior orbital fissure:
Cranial nerves:
V-2: (maxillary branch):
Zygomatic branch.
Orbital branches.
Infraorbital nerve.
Openings into Orbit
Nasolacrimal duct.
 Infraorbital groove:

Infraorbital nerve.

Supraorbital notch:
Supraorbital nerve.
Extrinsic Muscles of the Eye


Common annular tendon.
Superior oblique:
CN IV.

Inferior oblique:
CN III.

Superior rectus:
CN III.

Inferior rectus:
CN III.
Extrinsic Muscles of the Eye

Medial rectus:
CN III.

Lateral rectus:
CN VI.

Levator palpebrae superioris:
CN III.
Intrinsic Muscles of the Eye

Parasympathetics:
From:
Edinger-Westphal nucleus.
To:
Ciliary ganglion.
To:
Sphincter pupillae.
Intrinsic Muscles of the Eye

Sympathetics:
From:
T1.
To:
Superior cervical ganglion.
To:
Dilator pupillae:
Wraps around carotid artery.
Lacrimal Gland

Parasympathetics:
From:
Lacrimal nucleus:
Via CN VII.
To:
Sphenopalatine ganglion.
To:
Lacrimal gland:
Via CN V.
Lacrimal Gland

Sympathetics:
From:
T1.
To:
Superior cervical ganglion.
To:
Lacrimal gland.
Sensory Supply to Orbit
Optic nerve.
 Lacrimal nerve.
 Frontal nerve.
 Nasociliary nerve.
 Branches of V-2.
