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CRANIAL NERVE, ORBIT PROSECTIONS
2019 FALL
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
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.
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)
I Olfactory
II Optic
III Oculo-motor IV
Trochlear
V Trigeminal
VI Abducens
VII + VIII
INTERNALCAROTIDA.Pituitary stalk
TentoriumCerebelli
283I Olfactory
II Optic
III Oculo-motor
V Trigeminal
VI Abducens
VII + VIII
INTERNALCAROTIDA.Pituitary stalk
IX, X, XI
VERTEBRALA.
XIi
V Trigeminalunder dura
VI apparently in wrongplace
283
Trigeminal(Semilunar)Genglion
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
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
SUPERFICIAL ORBIT
SUPERIORRECTUS
LATERALRECTUS
SUPERIOROBLIQUE
TROCHLEA
MEDIALRECTUS
LACRIMALGLAND
LEVATOR PALPEBRAESUPERIORIS - III, SYMPATHETICS
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
Lev. PalpebraeSuperioris M.
SuperiorOblique M.
Frontal N.(V1) - SomaticSensory
LACRIMALGLAND (VII)
Lacrimal N.(V1) - SomaticSensory
SuperiorRectus M.
SUPERFICIALDISSECTION289(272)
OPHTHALMICARTERYUNDERCN II
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
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
SHORT CILIARY NERVES, CILIARY GANGLION (III)
TROCHLEARNERVE (IV)TROCHLEARNERVE (IV)
ANTERIOR ETHMOIDALNERVE (V1)
DEEP DISSECTION273
287
SUPERFICIALORBIT
DEEPORBIT
see OPTIC NERVE
SHORTCILIARYNERVESIII (Parasymp.)
SuperiorOblique M.
Lev. Palp. Sup + Sup. Rec.
FRONT NERVE (V1)SomaticSensory
INFERIOROBLIQUE
TENDONOF SUPERIOROBLIQUE
SuperiorOblique M.ROTATEMEDIALLY(Intorsion)
InferiorOblique M.ROTATELaterally(Extorsion)
NOSE
See why rotation (intorsion, extorsion) occurs
INFERIORRECTUS INFERIOR
OBLIQUE
TROCHLEA OF SUPERIOROBLIQUE
See why rotation (intorsion, extorsion) occurs
OVERVIEW ATLAS PICTURE