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1 2 3 Views Anterior Posterior Lateral (right) Midsagittal 4 5 Depression and Openings 1. fissure - cleft-like opening between adjacent parts of bones through which vessels & nerves pass 2. foramen - hole through which blood vessels, nerves, ligaments can pass 3. meatus - tunnel-like passageway through a bone 4. sinus - cavity within a bone with narrow opening 5. sulcus - groove or depression that accommodates a soft structure such as vessels, nerve, tendon 6. fossa - depression in/on a bone; generally at a joint 7. process - prominent projection or point of attachment Articular Process 1. condyle - large, rounded articular (joint) prominence 2. head - rounded articular projection supported by a more constricted portion of a bone (neck) 3. facet - smooth, flat surface on a bone 6 7 8 9 10 11 12 13 Remember that for every superior part there is always an inferior Contribution of bones that make the anterior part of the Orbit (Eye) Maxilla, Zygomatic, Frontal Contribution of bones that make the posterior part of the Orbit (Eye) Lacrimal, Ethmoid, and Sphenoid Foramens: Infraorbital Foramen Grooves: Infraorbital Groove Canals: Optic Canal Notches: Supraorbital Notch Fissures: Superior Orbital Fissure 14 15 16 Best Way to Learn the Openings is from Posterior to Anterior Second is applying the terminology and shape Third divide the opening into two section 4 (occipital and temporal) and 5 (sphenoid) 1 Foramen Magnum – magnum meaning large in size, is the largest opening (Magnum Condom) 2 Hypoglossal Canal – Hypo =below, Glossal= tongue, to make something glossy you have to lick it!!! 3 Jugular Foramen – looks like it shares both Occipital and Temporal bones 4 Internal Acoustic Meatus – clearly visible on the Temporal bone Fresh Homemade Juice Is-Awesome 5 Foramen Lacerum – First opening after Temporal, is like going over a ridge and then you fall into the hole 6 Foramen Spinosum – looks like it shares both Temporal and Sphenoid bones 7 Foramen Ovale – look at shape, looks like an oval and is the biggest opening in the Sphenoid 8 Foramen Rotundum – Smallest opening on the Sphenoid bone 9 Optic Canal – since the eyes are the most anterior opening in the cranium Lemonade, Strawberry, Orange, Raspberry, Or-Cramberry 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38