cranial nerve, orbit prosections 2019 fall review_cranial_nerve_orbit_prosections.pdf · genglion....
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CRANIAL NERVE, ORBIT PROSECTIONS
2019 FALL
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JUGULARFORAMEN –CN IX, X, XI
INTERNALAUDITORYMEATUS –VII, VIII
HYPO-GLOSSALCANAL –CN XII
CRIBRIFORMPLATE ETHMOID - I
OPTIC FORAMEN - II
SUP. ORBITAL FISSURE -III, IV, V1, VI
FORAMEN ROTUNDUM -V2FORAMEN OVALE -V3
SKULL SESSIONS -FORAMINA ASSOCIATEDWITH CRANIAL NERVES
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I
II
III
IVV VI
VII+VIII
IX, X+XI XII
V1V2V3
PITUITARYSTALK INTERNAL CAROTID A.
VERTEBRAL A.
MIDDLE MENINGEAL A.
BRAINSTEMDISSECTION IDENTIFY
BASILAR A.
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I - OLFACTORY CRIBRIFORMPLATE ETHMOID - I
OPTIC FORAMEN - II
SUP. ORBITAL FISSURE -III, IV, V1, VI
FORAMEN ROTUNDUM -V2FORAMEN OVALE -V3
II - OPTIC
III - OCULOMOTOR
IV - TROCHLEAR
V - TRIGEMINAL
VI - ABDUCENSVertebralartery
Internal Carotidartery
DISSECTION SKULL
LOCATIONOF CAVERNOUSSINUS (Sides ofSella Turcica)
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I Olfactory
II Optic
III Oculo-motor IV
Trochlear
V Trigeminal
VI Abducens
VII + VIII
INTERNALCAROTIDA.Pituitary stalk
TentoriumCerebelli
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283I Olfactory
II Optic
III Oculo-motor
V Trigeminal
VI Abducens
VII + VIII
INTERNALCAROTIDA.Pituitary stalk
IX, X, XI
VERTEBRALA.
XIi
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V Trigeminalunder dura
VI apparently in wrongplace
283
Trigeminal(Semilunar)Genglion
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4. Diaphragma Sella – over sella turcica
Tentorial Notch –opening for brainstem
3. Tentorium Cerebelli – forms roof of post. cran. fossa
DURAL REFLECTIONS
view inside cranial cavity
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GUIDE TO ORBIT PROSECTIONSSUPERFICIAL DISSECTION -MUSCLES INTACT -V1 branches to face; also muscle of upper eyelid (Lev. Palp. Sup.) , Lacrimal gland
DEEP DISSECTION - Reflect Lev. Palp. Sup., Superior Rectus Muscles;see Optic Nerve, structures entering back of eye (Ciliaryganglion); also V1 branchesto nasal cavity (Ant., Post. Ethmoidal N.)
ORBIT IS DISSECTED FROM FLOOR OF ANTERIOR CRANIALFOSSA
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SUPERFICIAL ORBIT
SUPERIORRECTUS
LATERALRECTUS
SUPERIOROBLIQUE
TROCHLEA
MEDIALRECTUS
LACRIMALGLAND
LEVATOR PALPEBRAESUPERIORIS - III, SYMPATHETICS
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SUPERFICIAL ORBITseeNERVES (V1)- V1 - Frontaln.: divides to form Supraorbital, SupratrochlearNerves
Muscles - Lev. PalpebraeSuperioris toUpper Eyelid - III +Symp.
Lev. PalpebraeSuperioris M.
SuperiorOblique M.
Superior Rectus M
Frontal N.(V1) - SomaticSensory
Supraorbital N.Supratrochlear N.Somatic Sensory
NOSE
LACRIMALGLAND
TROCHLEAR N.(IV)
Lacrimal N.(V1) -Somatic Sensory
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Lev. PalpebraeSuperioris M.
SuperiorOblique M.
Frontal N.(V1) - SomaticSensory
LACRIMALGLAND (VII)
Lacrimal N.(V1) - SomaticSensory
SuperiorRectus M.
SUPERFICIALDISSECTION289(272)
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OPHTHALMICARTERYUNDERCN II
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REFLECT LEV PALP SUP,SUP. RECTUS.
DEEP ORBIT
REFLECT LEV PALP SUP,SUP. RECTUS.
TROCHLEA OF SUP. OBLIQUE
see OPTIC NERVE
ANTERIOR AND POSTERIOR ETHMOIDAL NERVES (V1)
CILIARYGANGLION- PARA-SYMP. III
LACRIMALGLAND
LONG CILIARY NERVES (V1)
SHORTCILIARYNERVESIII
NOSE
SENSORY - V1 branches - MEDIALPARASYMPATHETIC -III - LATERAL
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see OPTIC NERVE
ANTERIOR AND POSTERIOR ETHMOIDAL NERVES (V1) Somatic Sensory
LACRIMALGLAND
SuperiorOblique M.
CILIARYGANGLION- PARA-SYMP. III
SHORTCILIARYNERVESIII (Parasymp.)
LPS +SRmusclesreflected
TrochlearN. (IV)
ANT. AND POST. ETHMOIDAL FORAMINA
DEEP DISSECTION273
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SHORT CILIARY NERVES, CILIARY GANGLION (III)
TROCHLEARNERVE (IV)TROCHLEARNERVE (IV)
ANTERIOR ETHMOIDALNERVE (V1)
DEEP DISSECTION273
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287
SUPERFICIALORBIT
DEEPORBIT
see OPTIC NERVE
SHORTCILIARYNERVESIII (Parasymp.)
SuperiorOblique M.
Lev. Palp. Sup + Sup. Rec.
FRONT NERVE (V1)SomaticSensory
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INFERIOROBLIQUE
TENDONOF SUPERIOROBLIQUE
SuperiorOblique M.ROTATEMEDIALLY(Intorsion)
InferiorOblique M.ROTATELaterally(Extorsion)
NOSE
See why rotation (intorsion, extorsion) occurs
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INFERIORRECTUS INFERIOR
OBLIQUE
TROCHLEA OF SUPERIOROBLIQUE
See why rotation (intorsion, extorsion) occurs
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OVERVIEW ATLAS PICTURE