Quiz 4 Flashcards
Piriform aperture
Anterior opening, large and triangular
Nasion
Midpoint, junction of the frontal and nasal bones
Bridge of the nose
Underneath nasion, formed by two paired nasal bones
Nasal concha
Scroll like projections that extend into nasal cavity
Superior /middle nasal concha made of what bone?
Ethmoid
Inferior concha made if what bone?
Separate facial bone
Nasal meatus
Passageway found beneath each conchae
Meatus contains:
An ostia (opening) which paranasal sinus and nasolacrimal duct drains into nasal cavity
Nasal septum
Vertical portion, divides the two nostrils
Nasal septum is formed by:
Superior:
Nasal septum cartilage (anterior) and perpendicular plate of the ethmoid bone (posteriorly)
Inferior:
Vomer bone
Coronal suture
Frontal and parietal bones
Lambdoidal suture
Parietal and occipital bones
Squamosal suture
Temporal and parietal bones
Temporal fossa
Formed by several bones, contains body of temporalis muscle
Infra temporal fossa
Inferior to temporal fossa
Pterygopalatine fossa
Deep to infra temporal fossa, pterygopalatine canal goes through it
Hard palate formed by:
Palatine processes of the maxilla
Horizontal plates of the palatine bones
Two prominent sutures of the hard palate:
Median palatine suture and transverse palatine suture
Hard palate forms:
Floor of the nasal cavity as well as the roof of the mouth
Posterior nasal apertures (choanae)
Posterior funnel shaped openings of the nasal cavity, located directly posterior to palatine bones
Superior edge if nasal apertures formed by:
Vomer and sphenoid bones
Medial border of each aperture formed by:
Posterior edge of vomer
Lateral borders of nasal aperture formed by:
The pterygoid process if the sphenoid bone
Pterygoid canal
Small canal that opens into the pterygopalatine fossa; carries pterygoid nerve and blood vessels
Pterygoid process
Lateral to the nasal apertures, made up of medial and lateral pterygoid plates
Medial pterygoid plate
Very thin, Hamulus process forms on the inferior portion
Lateral pterygoid plate
More flattened
Pterygoid fossa
Depression between medial and later pterygoid plates
Foramen ovale
Large opening of the sphenoid bone, mandibular division of the trigeminal V cranial nerve
Foramen spinosum
Smaller more posterior opening on the sphenoid bone, carries the meningeal artery into cranial cavity
Foramen lacerum
Second biggest opening, carotid artery emerges here from the carotid canal
Carotid canal
Opening in temporal bone, carries internal carotid artery and sympathetic carotid plexus
Styloid process
Lateral and posterior to carotid canal, pointed bony projection located on temporal bone
Stylomastoid foramen
Immediately posterior to Styloid process, facial VII cranial nerve exits from the skull to the face
Jugular foramen
Internal jugular vein, glossopharyngeal IX, vagus X, and spinal accessory XI pass through opening
Foramen magnum
Biggest opening, spinal cord and vertebral arteries pass through
Cribriform plate
Opening for the olfactory nerve I cranial nerve
Foramen rotundum
Located between foramen ovale and foramen lacerum; opening for the maxillary division of the trigeminal V cranial nerve
Hypoglossal canal
Opening for the Hypoglossal XII cranial nerve
Internal acoustic meatus
Facial nerve VII and vestibulocohlear nerve VIII
Occipital condyles
Curved smooth projections on both sides of the foramen magnum
Pharyngeal tubercle
Midline projection above foramen magnum
Jugular notch of occipital bone
Medial portion of two bones that form the jugular foramen
Occipital bone
Single cranial bone that articulates with the parietal, temporal, and sphenoid
Frontal bone
Single cranial bone that forms the forehead and the superior portion of the orbits, articulates with the parietal, sphenoid, lacrimal, nasal, ethmoid, zygomatic and maxilla
Supra orbital ridge
Curved elevations over the eyes
Supra orbital notch
Notch in the supraorbital ridge, supraorbital nerve and artery pass through
Glabella
Smooth elevates area between eyebrows, flat in women and children rounded in men
Zygomatic process of the frontal bone
Bony projection that attaches to the zygoma
Lacrimal fossa
Inside the supraorbital ridge
Lacrimal gland
Located in fossa, lubricates eye drains through the nasolacrimal duct into nasal cavity
Parietal bones
Paired and articulate at the sagittal suture, also articulate with the occipital, frontal, temporal and sphenoid bones
Temporal bones
Paired and articulate with parietal, sphenoid, occipital, and zygomatic bones
Three portions of the temporal bones:
Squamous, tympanic, petrous portion
Articular fossa
Depression that the mandibular condyle articulates in
Articular eminence
Round raised bony structure just anterior to fossa
Postglenoid process
Posterior aspect of the eminence
Petrotympanic fissure
Separates tympanic portion and petrous portion of temporal bones; chorda tympani nerve passes through
Mastoid process
Large rounded roughened projection
Mastoid notch
Depression just medial to the astound process
Styloid process
Long pointed bony projection, located inferior and medial to external acoustic meatus
Stylomastoid foramen
Facial nerve VII passes through, between the Styloid process and mastoid process