Bony Composition of Orbits
تشريح عملي / ثاني اسنان موصل Eye **
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Identify the elements of the bony orbit on a skull or x-ray.
*Trace the flow of blood into and out of the orbit and orbital structures.
Internal carotid a.Ophthalmic a.
Lacrimal a.
Post. ethmoidal a.
Ant. ethmoidal a.
Supratrochlear a.
Supra-orbital a.
Lacrimal gland
Facial v.
Sup. Ophthalmic v.
Cavernous sinus
Pterygoid plexus
Inf. Ophthalmic v.
Retromandibular v.
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LR
SO
IR
IO
MR
SR
LP
Identify the extra-ocular muscles.
Side view
Frontal views
Levator palpebrae
Superior oblique
Inferior rectus
Superior rectus
Lateral rectus (cut)
Inferior oblique
Medial rectus
Optic nerve
LP
SR
SO
IO
IR
MR
LR
LR
SO
IR
IO
MR
SR
LP
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Indicate the nerve supply to each.
V
III
IV
VI
V1
V2
V3
II
Frontal n.
Supratrochlear n.
Supra-orbital n.
Lacrimal n.
Sensory nerves are branches of the ophthalmic division of the trigeminal- V1
V
III
IV
VI
II
VI
Nasociliary n.
Lacrimal n.
Ciliary ganglion
Short ciliary nn.
Ethmoidal nn.
Frontal n. (cut)
Infratrochlear n.
Long ciliary nn.
Motor nerves are branches of cranial nerves III, IV, and VI
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Arterial system
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