Orbits
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44 terms
Terms | Definitions |
|---|---|
 roof of orbit | frontal bone- lesser wing of sphenoid |
| floor of orbit | maxilla-zygomatic bone- palatine |
| Medial wall | Lacrimal- ethmoid- Maxilla- sphenoid (lems) |
| lateral wall | zygomatic bone- greater wing of sphenoid |
| Located within the sphenoid bone | optic canal |
| transmits optic nerve ( CN III) and opthalmic artery | optic canal |
| Transmits supraorbital vessels and nerve within frontal bone | supraorbital foramen |
| transmits CN 3,4,6 and opthalmic nerve( divisions: nasociliary, frontal, and lacrimal) | superior orbital fissure |
| Transmits maxillary nerve( CN V2), infraorbital vessels | Inferior orbital fissure |
| Btw greater wing of sphenoid, maxilla and zygomatic | Inferior orbital fissure |
| provides a route of spread for infection | Infraorbital sulcus |
| Lacrimal nerve is a branch of... | opthalmic nerve V1 |
| Innervate muscles which move the eyeball | CN 3,4,6 |
| the extraocular muscles are divisions of the --- artery | Opthalmic artery |
| Elevates the upper eyelid | elevator palpebrae superioris |
| Which nerve innervates muscles that move the eyeball | Oculomotor nerve |
| Closes 18-24 months after birth | Anterior fontanel |
| closes 2 months after birth | posterior fontanel |
| closes 3 months after birth | anterolateral fontanels |
| keystone of the cranial nerve | sphenoid bone |
| Is there Foramina in the parietal bone | NO |
| small depression btw supracilliary arches | glabella |
| above the glabella | metopic suture |
| forms cheekbones | zygomatic bone |
| smallest bones of the face | lacrimal bones |
| largest and strongest facial bone | mandible |
| cranial cavity contains --- bones | 8- bones - 2 parietal- 2 temporal- frontal- occipital-sphenoid- ethmoid |
| facial bones contain-- bones | 14 bones- 2 nasal-2 maxilla-2 zygomatic- 2 lacrimal- 2 palatine - 2 inferior nasal conchae- mandible- vomer |
| what are the 3 foramina located in the sphenoid bone? | foramen rotundum- maxillary division of trigeminal V2 Foramen ovale- Mandibular division V3 Foramen spinosum- middle meningeal artery |
| passes thru the SOF and thru the CTR | Nasociliary, Oculomotor, Abducens (NOA) |
| Thru SOF and Above CTR | Superior Opthalmic Vein- Frontal Nerve- Lacrimal Nerve- Trochlear Nerve |
| Thru SOF and Below CTR | Inferior Opthalmic Vein |
| orbit consists of --- bones | 7 |
| thinnest | medial wall |
| weakest | floor |
| strongest | lateral |
| bones of the nose | maxillae, nasal, frontal bones and the nasal spine. |
| contains the utricle and saccule that are used for balancing | Vestibule |
| maintains fixation called the doll's eye reflex | vestibule |
| communicates with the vestibule and ampullae that detect angular acceleration- Also stabilizes retinal image to keep the image centrally located and on the fovea | semi-circular canals |
| innervated by the chorda tympanic nerve- dampen the amt of vibrations | stapedius and tensor typmanic muscle |
| separates the external and middle ear | tympanic membrane |
| separates the middle and inner ear | oval window |
| Nose is innervated by CN-- | Opthalmic, Maxilla ( CN V 1,2) and Olfactory CN1 |
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