CL Anatomy Flashcards
Parts of temoporal bone
Squamous, petrous, mastoid, tympanic
What attaches to superior and inferior temporal lines?
Temporalis (Mandibular nerve V3)
What opens onto the temporal bone?
External auditory meatus
What bony prominence lies posterior to the external acoustic
Mastoid process
Clinical significance of the communication between middle ea
Chronic otitis media can result in infection of the mastoid process of the temporal bone
What is the bony protuberance from the temporal bone anterio
Styloid process
What bones articulate at the pterion?
Forntal, temporal, parietal, sphenoid
What bones form the floor of the anterior cranial fossa?
Ethmoid, sphenoid, frontal bones
In what bone is the cribiform plate, what passes through it
- Ethmoid bone2. Olfactory nerves3. Fracture results in CSF leak- rhinorrhoea
What is the bony projection upwards in the midline of the et
- Crista galli2. Attachment of falx cerebri3. Foramen cecum (passes to nasal cavity)
What part of the brain lies in the middle cranial fossa?
Temporal lobes
Borders of middle cranial fossa?AnteriorlyPosteriorlyLateral
Anterior: Greater and lesser wings of sphenoidPosterior: Petrous temporal boneLateral: Squamous temporal bone, parietal bone, greater wing of sphenoidFloor: Temporal bones, greater wing of sphenoid
3 structures passing into orbit from middle cranial fossa vi
Optic nerve
Ophthalmic artery (branch of ICA)
Central retinal vein
Structures passing through superior orbital fissure
Occulomotor nerveOphthalmic veins- superior and inferiorTrochlear nerveOphthalmic nerve (V1)Abducens nerve
Foramen rotundum connects which 2 spaces?What does it transm
Pterygopalatine fossa and middle cranial fossaMaxillary nerve (V2)
Foramen ovale connects which 2 spaces?What does it transmit?
Middle cranial fossa and infratemporal fossaMandibular nerve (V3), accessory meningeal artery
Foramen spinosum connects which 2 spaces and transmits what
Middle cranial fossa to infratemporal fossaMiddle meningeal artery
What opening lies medial to foramen ovale and spinosum? What
Foramen lacerumNothing!
What do the ridges on the anterior petrous temporal bone tra
Greater and lesser petrosal nerves
Path and function of greater petrosal nerve?
Efferent fibres of parasympathetic fibres from facial nerve to lacrimal gland. Facial nerve damage causes dry eyes!
Path and function of lesser petrosal nerve?
Via otic ganglion to join chorda tympani and supply taste to anterior 2/3 tongue
What space lies inferior to sella turcica?
Sphenoid sinus
What attaches to the posterior cliniod processes?
Tentorium cerebelli
What part of the brain lies in the posterior cranial fossa?
Cerebellum and brainstem