The skull and its landmarks DTH23 Part A 4 of 5.pdf
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The Skull and its Landmarks Part 4 of 5 Shenoid Julie Watson The Cranium – The Sphenoid Bone Articulates to form orbit of still sits in cr...
The Skull and its Landmarks Part 4 of 5 Shenoid Julie Watson The Cranium – The Sphenoid Bone Articulates to form orbit of still sits in cranium I anteriorly · · Skull rigidity. Contributes · to :nasal cavity lightweight +increaa · · mesial wall of optic canal Sinners ; · sphenoid · Attachment Sites MOM. for part of it Loading… · forms facial Skeleton · transports blood +nerve vessels through foramina · Helps to form base+ natural sides ofSVour - 3 Contributes to middle cranial · fossa. Wedge Greek shapemostofmiddle What is the Sphenoid Bone Unpaired bone Most complex bone due to its irregular shape Known as wasp/butterfly bone due to its shape not delicate 2 lesser Body wings · ·. · I greater wings · Ipterygoid processes 4 Stone, Anatomical Structure - there are four main parts IX 2 2x Ex Loading… 5 Image from Ken hub Occupies central Cranial fossa position in middle opy shape sodall Smooth 8 ↑ Sella turica ↓ undersurface Saddle shaped · roof of nasal pharynx depression. ↓ Housed pituitary gland draining nor air sinus + sphenoid occipital nerves grooves for 6 2 thin · of triangular bone. plates esser wines · project anteriorly from corner of superior surface of sphenoid bone. · Separated from greater wings by superior orbital fissures. nerves t reing travel through. 7 Triangularisshape , Enter · winds lateral to body. · Internal Surface conceived, Contributes to floor of middle cranial fossa. · 3 foramina in each greater wing (6) 8 # eYGOID PROCESS Foramina and Bony Landmarks of the Sphenoid Bone · 2 lamance MoM. connect (outer) - · posterior opening of nasal Pterygoid- carity 9 Why are these Foramen important? LA ; infiltration. - Foramen Rotundum: Transmits the maxillary division of the trigeminal nerve from the middle cranial fossa into the Pterygopalatine fossa block LAjID. ↓ Foramen Ovale: Transmits the mandibular division of the trigeminal nerve from the middle cranial fossa to the Infratemporal fossa ~ LA ! Foramen Spinosum: Transmits the middle meningeal vessels and the meningeal branch of the mandibular division of the trigeminal nerve 10 You Tube clip for this section https://www.youtube.com/watch?v=LYkASTl_e1c (Sphenoid Bone) Loading… 11
