Download Cranial Foramina

Superior Orbital Fissure
1. Extraconal (lateral to medial)
a. Lacrimal (V1)
b. Frontal (V1)
c. Trochlea (IV)
2. Intraconal (enter between 2 heads of rectus lateralis – highest to lowest)
a. Superior division of Oculomotor (III)
b. Nasociliary (V1)
c. Inferior division of Oculomotor (III)
d. Abducens (VI)
e. Superior Opthalmic vein (angular vein to cavernous sinus)
f. Sympathetic fibers from cavernous plexus (long ciliary nerves)
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Inferior Orbital Fissure
1. Zygomatic nerve
2. Infraorbital nerve
3. Inferior Opthalmic Vein (facial vein to pterygoid plexus)
Optic Canal
1. Opthalmic artery
2. Optic nerve
Foramen caecum
1. emissary veins to superior sagittal sinus
Foramen Ovale
1. Mandibular nerve
2. Accessory meningeal artery
3. Lesser petrosal nerve (occasional)
Foramen Spinosum
1. Middle meningeal artery/vein
2. Lesser petrosal nerve (occasional)
Internal acoustic meatus
1- Facial ( VII ) nerve;
2- Vestibulocochlear ( VIII ) nerve;
3- Labyrinthine artery;
Jugular foramen
1- Inferior petrosal sinus - anteriorly
2- Glossopharyngeal ( IX ) nerve – anterior part, lateral to IPS
3- Vagus ( X ) nerve – middle part
4- Accessory ( XI ) nerve; middle part, lateral to vagus
5- Sigmoid sinus;
6- Posterior meningeal artery;
Condylar canal
1. emissary vein
2. meningeal branch (posterior meningeal artery) of ascending pharyngeal artery