Sphenoid Bone Revision PDF

Sphenoid bone · miculation s palatine , zygomatic + romer. ructur aired bone. Helps form >...

Sphenoid bone · miculation s palatine , zygomatic + romer. ructur aired bone. Helps form > - middle part of the base and sides of skull , floor of middle cranial fossa , orbital floor + nasal cavity. 4 main parts > - Body x1 > - Lesser wing x2- · Located centrally. · 2 thin triangular plates of bone. · Stella turcica ; saddle shaped depression , houses pituitary gland. Projects from anterior aspect of body superolaterally. , sphenoid sinuses located beneath Stella turcica : drains into nasal cavity.Optic canal : contains optic nerve and ophthalmic artery. Greater wing x2 - > Pterygoid process x2 > 2 triangular wings project posterolaterally from body. · Extend from posterior surface of body. · , 2 plates > lateral contributes to ; floor of middle cranial fossa lateral wall skull · plate > wider · , of. - - , shorter , origin of the · 3 foramen rotundum - Transmits maxillary division medial and lateral pterygoid muscles. foramina in each wing > - of trigeminal middle cranial fossa > medial plate small , inner , hook shape - nerve : pterygopalatine fossa. > - > foramen ovale > Transmits mandibular division of trigeminal process supports posterior opening of - nerve ; - , middle cranial fossa infratemporal fossa. nasal cavity. > Transmits middle vessels and meningeal branch - foramen spinosum > meningeal - mandibular division of of trigeminal nerve.