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Sphenoid
| Question | Answer |
|---|---|
| Body | thick part of bone along the midline of the body |
| Greater wings | biggest wings which go furthest from midline |
| Lesser wings | thin wings above the greater wings |
| Pterygoid process | bottom “wings” |
| Optic foramen | passes below lesser wings—very large, circular foramen |
| Sulcus for the optic nerve | in between optic foramen—is where the nerves cross |
| Ethmoidal spine | same as sphenoidal crest thin, crest-like outjutting |
| Anterior clinoid process | look in book (really easy to see) |
| Posterior clinoid process | look in book (really easy to see) |
| Tuberculum sellae (sella turcica) | |
| Hypophyseal fossa | fossa between the anterior and posterior clinoid processes |
| Dorsum sellae | |
| (hypophyseal fossa + dorsum sellae | sella turcica) |
| Superior orbital fissure | large, fissure like opening under the lesser wings—first of the 4 openings in order |
| Foramen rotundum | round foramen—second of the 4 openings in order |
| Foramen ovale | oval foramen—third of the 4 openings in order |
| Foramen spinosum | small, round foramen—fourth of the 4 openings in order |
| Pterygoid canal | at the root of the pterygoid process |
| Lateral pterygoid plate | outside plates of process |
| Medial pterygoid plate | inside plates of process |
| Pterygoid fossa | ditch in between laterial and medial pterygoid plate |
| Pterygoid fissure | fissure in bone leading up to pterygoid canal |
| Hamulus | hooks at bottom of medial pterygoid plates |
| Clivus | slight endocranial hollow that slopes posteriorly from the dorsum sellae toward the sphenooccipital suture |
| Rostrum | continuation of sphenoidal crest (below sphenoidal crest) |
| Sphenoidal crest | same as ethmoidal spine? |
| Orbital surfaces | self explanatory |
Created by:
AdamJFLA
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