G19 PP lecture 2008 - Eccles Health Sciences Library · PDF file · 2008-10-221....
Transcript of G19 PP lecture 2008 - Eccles Health Sciences Library · PDF file · 2008-10-221....
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G19: Orbit
David A. Morton, Ph.D.
Syllabus - Pg. 41
ANAT 6010- Medical Gross Anatomy
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1. Eyelid and Conjunctiva
2. Lacrimal apparatus
3. Eyeball layers
4. Extraoccular muscles
5. Vasculature of the orbit
6. Innervatin of the orbit
Objectives
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1) Eyelid
Orbicularis oculi m.
Pg. 41-42
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1) Eyelid
Superior tarsal m.
Pg. 41-42
Levator palpebrae
superioris m.
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1) Eyelid
Conjunctiva
• Palpebral
• Bulbar
Pg. 41-42
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2) Lacrimal Apparatus
Pg. 41-42
VM para CN VII
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2) Lacrimal Apparatus
Pg. 41-42
Superior salvatory nucleus
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2) Lacrimal Apparatus
Pg. 41-42
Facial n. (CN VII)
Internal acoustic meatus
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2) Lacrimal Apparatus
Pg. 41-42
Greater petrosal n. Greater petrosal hiatus
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2) Lacrimal Apparatus
Pg. 41-42
Greater petrosal n.
Deep petrosal n.Nerve of thepterygoid canal
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2) Lacrimal Apparatus
Pg. 41-42
Pterygopalatine ganglion
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2) Lacrimal Apparatus
Pg. 41-42
Pterygopalatine ganglion
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2) Lacrimal Apparatus
Pg. 41-42
Hitchhike on CN V-2 and V-1 to lacrimal gland
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2) Lacrimal Apparatus
Hitchhike on CN V-2 and V-1 to lacrimal gland
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3) Eyeball
Pg. 43-44
a) Fibrous layer
b) Choroid layer
c) Retina
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3) Eyeball
Pg. 43-44
a) Fibrous layer
• Cornea (CN V-1)
• Sclera
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3) Eyeball
Pg. 43-44
a) Chroid layer
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3) Eyeball
Pg. 43-44
a) Chroid layer
• Ciliary m.
• Suspen. lig.
• Lens
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3) Eyeball
Pg. 43-44
a) Chroid layer
• Ciliary m.
• Suspen. lig.
• Lens
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3) Eyeball
Pg. 43-44
a) Chroid layer
• Iris
• Pupil
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3) Eyeball - Sphincter pupillae m.
Pg. 43-44
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3) Eyeball - Sphincter pupillae m.
Pg. 43-44
VM CN III
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3) Eyeball
a) CN III Parasymp - ciliary mm. and sphincter pup.
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3) Eyeball - Dilator Pupillae m.
Pg. 43-44
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3) Eyeball - Dilator Pupillae m.
Pg. 43-44
VM Symp
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3) Eyeball
a) CN III Symp - pup. dilator and sup tarsal m.
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3) Eyeball
Pg. 43-44
c) Retina
• Fovea centralis
CN II
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3) Eyeball
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4) Extra-ocular Muscles
Pg. 45-46
• 4 Rectus
• 2 Oblique
Nose
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4) Extra-ocular Muscles
Pg. 45-46
• 4 Rectus
• 2 Oblique
NOSE
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4) Extra-ocular Muscles
Pg. 45-46
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Pg. 45-46
4) Lateral Rectus Muscle
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Pg. 45-46
M L
4) Lateral Rectus Muscle
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4) Lateral Rectus Muscle
Pg. 45-46
M L
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4) Lateral Rectus Muscle
Pg. 45-46
M L
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4) Superior Rectus Muscle
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M LSR
4) Superior Rectus Muscle
Incorrect
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Correct
4) Superior Rectus Muscle
M L
SR
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4) Superior Rectus Muscle
M L
SR
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4) Superior Rectus Muscle
Superior rectus Superior rectus
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4) Superior Oblique Muscle
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M LSO
4) Superior Oblique Muscle
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M LSO
4) Superior Oblique Muscle
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4) Superior Oblique Muscle
Superior oblique Superior oblique
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Clinical Testing - Eye Muscles
Pg. 47-48
NOSE
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Horizontal Orbital Axis
Lateralrectus
Medialrectus
Clinical Testing - Eye Muscles
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Clinical Testing - Lateral Rectus
M L
NOSE
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M L
NOSE
Clinical Testing - Lateral Rectus
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Vertical Orbit Axis
Superior rectus and Superior oblique
Inferior rectus and Inferior oblique
Clinical Testing - Eye Muscles
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M L
SR
Clinical Testing - Superior Rectus
Axis of muscleAxis of eyeballNOT PARALLEL
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M L
SR
Clinical Testing - Superior Rectus
Axis of muscleAxis of eyeballPARALLEL
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M L
SR
Clinical Testing - Superior Rectus
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M L
SR
Clinical Testing - Superior Rectus
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M LSO
Clinical Testing - Superior Oblique
Axis of muscleAxis of eyeballNOT PARALLEL
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Clinical Testing - Superior Oblique
Axis of muscleAxis of eyeballPARALLEL
M LSO
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Clinical Testing - Superior Oblique
M LSO
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Clinical Testing - Superior Oblique
M LSO
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Anatomical Actions Clinical Testing
Clinical Testing - Superior Oblique
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• Internal carotid artery
• Ophthalmic artery – enters orbit via the optic foramen
• Central artery of the retina
5) Vasculature of the Orbit
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Veins
• Superior ophthalmic vein drains into cavernous sinus
• Inferior ophthalmic vein drains into pterygoid plexus and cavernous
sinus
• Both veins anastamose with the facial vein
GAFS Fig. 8.93
5) Vasculature of the Orbit
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6) Innervation of the Orbit
LR SO R6 4 3
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6) Innervation of the Orbit
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