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Holes in the Head
Foramina, fissures, and canals
12
Anatomy
12/06/2009

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Cards

Term
Cribiform plate
Definition
Ethmoid, most anterior, where filaments of CN I go through. By the bridge of nose, in the middle of the plate is the crista galli.
Term
Foramen magnum
Definition
Occipital, where the spinal cord comes out.
Term
Internal acoustic meatus
Definition
Temporal, anterior to foramen magnum, CN XIII goes through, hearing and equilibrium.
Term
Carotid canal
Definition
Temporal, base of skull, carotid arteries (internal) travel through.
Term
Jugular foramen
Definition
Between temporal/occipital, lateral to foramen magnum. Jugular vein goes through, along with CN IX, X, XI.
Term
External auditory meatus
Definition
Temporal, can see in external view, ear hole.
Term
Optic canal
Definition
Sphenoid, CN II comes through. Becomes optic foramen in the orbits.
Term
Inferior orbital fissure
Definition
Between stephnoid/maxilla, found in eye socket. CN V (maxillary branch) comes out, goes to infraorbital foramen.
Term
Superior orbital fissure
Definition
Sphenoid, between two wings. CN III, IV, V (opthalmic branch, comes out supraorbital foramen), VI.
Term
Infraorbital foramen
Definition
Maxilla, CN V comes out onto face.
Term
Mental foramen
Definition
Mandible, CN V (mandibular branch) goes into jaw and comes out.
Term
Supraorbital foramen
Definition
Frontal, CN V (opthalmic branch) comes out. Sometimes not a hole, just a notch.