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Skull-Facial & sinus

Procedures 2. (Facial bones, sinuses......) Chap 11

3 divisions of ear? external, middle, internal
The _____ process and ____ tip of the temporal bone are posterior and inferior to EAM. The ____ process is inferior and slightly anterior. mastoid process and mastoid tip. Styloid process
The 3 main parts of the middle ear? tympanic membrane, 3 small bones of the auditory ossicles, tympanic cavity.
The eustachian tube is the passageway between the ____ ear and the _____. (sensation of ears popping is pressure being adjusted to prevent damage to the eardrum) middle ear and nasopharynx
What are the 3 small bones in the auditory ossicles of the middle ear? malleus, incus, stapes.
What portion of the ear is the sensory apparatus of hearing and equilibrium? internal ear.
Of the internal ear, the osseous (bony) labyrinth is divided into 3 distinctly shaped parts: cochlea, vestibule, semicircular canal.
Of the ___ facial bones, only ___ are single bones the rest are pairs. 14, 2 (vomer and mandible)
Largest immovable bones of the face? maxillary. (mandible is largest)
Each maxilla assists in formation of what 3 cavities of the face mouth, nasal, one orbit.
4 processes of maxilla? frontal, zygomatic, alveolar, palatine
processes of maxilla: frontal projects ____, zygomatic projects ____ upwards, laterally
What process of the maxilla is the inferior aspect of each body of the maxilla that 8 upper teeth occur along? alveolar
what forms the anterior portion of the roof of the mouth? the 2 palatine processes of the maxilla. ( palatine bones make up the posterior portion of hard palate)
Each maxilla articulates with what 2 cranial bones and how many facial bones? frontal and ethmoid. Articulates with all facial bones except mandible
Makes up the lower outer portion of the orbits? Zygomatic bone
Projecting posteriorly from the zygoma is a slender process that connects to the zygomatic process of the ____ bone to form the zygomatic arch temporal bone
Anterior portion of zygomatic arch is formed by what? posterior part? What is this area termed zygoma, zygomatic process of temporal bone. termed zygomatic prominence
Each zygoma articulates with what 3 cranial bones and what facial bone? frontal, sphenoid, temporal. Maxilla
The ____ and ____ bones are the thinnest and most fragile bones in the entire body lacrimal and nasal
The lacrimal bones lies ____ on the ____ side of the orbit. anteriorly on the medial side
Point of junction of the two nasal bones with the frontal is termed nasion
Each lacrimal bone articulates with what 2 cranial and what 2 facial bones frontal and ethmoid, maxilla and inferior nasal concha
Each nasal bone articulates with what two cranial and what 2 facial bones? frontal and ethmoid, maxilla and adjacent nasal
Within the nasal cavity are two platelike bones called the ____ inferior nasal conchae
How many pairs of nasal conchae are there and what are they? 3, superior and middle pairs are parts of the ethmoid bone, and then the inferior pair which are separate facial bones.
Purpose of nasal conchae? divide nasal cavities into compartments to break up the flow of air before it reaches the lungs
The ______ and _____ of the ethmoid bone help separate the cranium from the facial bone mass cribiform plate and crista galli
inferior nasal concha articulates with what cranial bone? What 3 facial bones? ethmoid. Maxilla, lacrimal, and palatine
Each palatine bone articulates with what 2 cranial bones? what four facial bones? sphenoid and ethmoid. Maxilla, inferior nasal conchae, vomer, adjacent palatine
The septum is formed superiorly by the ___________, and inferiorly by the _____. perpendicular plate of the ethmoid, vomer
Nasal septum cartilage is termed septal cartilage
Deviated septum usually occurs between the ____ and ____ septa cartilage and vomer
When do the two bones of the mandible (in an infant..only...) join to become one? about 1 year
Anterior to the angle/gonion is termed _____. Area superior to the angle/gonion is termed the _____. body (which extends from left angle around to the right), ramus
_________ or ridge, extends along entire superior portion of the body of the mandible where teeth are rooted alveolar process
Single mandible body forms from each lateral half and unites at the anterior midline and is called symphysis menti
flat triangular area below symphysis menti, marked by 2 protuberances is called? mental protuberance. (center of this is mental point)
Center of the mental protuberance of the mandible is termed? mental point
Ramus of mandible terminates in a U shaped notched termed mandibular notch
process at anterior end of mandibular notch is termed the _____. The posterior process is termed the _____. coronoid process, condyloid process
How to remember coronoid of mandible and ulna and coracoid of scapula? "n" in coronoid with "n" in ulna and mandible
The ______ process of mandible consists of two parts: head and the neck condyloid
The condyle of the _____ process fits into the TM fossa of the temporal bone to form the TMJ condyloid
TMJ is located where in proportion to the EAM? just anterior and slightly superior
TMJ is classified as a ______ type of joint. synovial (diarthrodial)
Type of joint involving the teeth and mandible and maxillae ? gomphosis subclass of fibrous
How to tell if mouth is open or closed on a TMJ position? condyle moves forward to the front edge of the fossa
Only the ___ sinuses are part of the facial bone structure maxillary
What sinuses have a definite cavity at birth? maxillary
The frontal and sphenoid sinuses begin to be visible on radiographs at age ___-__. All paranasal sinuses generally are developed by what age? 6-7 years old. All developed by late teen years
Older term for maxillary sinus antrum of highmore
Floor of each maxillary sinus is slightly below the level of the floor of each nasal fossa
Which sinuses rarely become aerated before age 6 frontal
Ethmoid sinuses are contained within the ______ or _____ of the ethmoid bone. lateral masses or labyrinths
When viewed from the side, why do the anterior ethmoid sinuses appear to fill the orbits? portions of the ethmoid sinuses are in the lateral masses of the ethmoid bone, which helps form the medial wall of each orbit
Sphenoid sinuses lie in the body of the sphenoid, which is directly below the ___ sella turcica
sphenoid effusion is what (if air fluid levels are seen in sphenoid sinus) basal skull fracture, blood or cerebral fluid is leaking through fracture into sinus
Drainage/communication passageways of the sinuses make up the _____________, which can become obstructed, leading to an infection of these sinuses termed ______. osteomeatal complex, sinusitis
two key passageways of osteomeatal complex? infundibulum and middle nasal meatus
Rim of the orbit, which corresponds to the outer circular portion of the cone, is called the____. Posterior portion of the cone is called ___. base, apex
With the head placed in an upright frontal or lateral position with the OML parallel to the floor, each orbit would project superiorly at an angle of ___ and toward the MSP at an angle of ___. 30, 37
Each optic foramen is located at the __ of its respective orbit apex
To xray optic foramen how must patient be positioned? chin extended 30 degrees and head rotated 37
______ of ____ bone forms most of the roof of the orbit orbital plate of frontal
zygoma forms much of the _____ wall and some of the _____ of the orbit lateral wall floor.
Maxilla helps to form the ____ of the orbit floor
____ and ____ make up most of the posterior orbit sphenoid and ethmoid
7 bones that make up the orbit Frontal, sphenoid, ethmoid, Maxilla, zygoma, lacrimal, palatine.
small hole in sphenoid that is located posteriorly at the apex of the cone-shaped orbit optic foramen
opening between the greater and lesser wings superior orbital fissure
opening between maxilla, zygomatic bone, and greater wing of the sphenoid inferior orbital fissure
Small root of bone that separates the superior orbital fissure from the optic canal is known as the sphenoid strut
What/where are basal skull fractures? fracture through dense inner structures of the temporal bone
What is a contrecoup fracture? fracture to one side that is caused from an impact on the other. EX- blow to one side of mandible creates a fracture on opposite side
Blow out fracture? fracture of floor of orbit cause by object striking straight on. (may cause perception of two images)
PA skull projection (CR and OML perp) causes the petrous pyramids to be where? directly into the orbits
Optic foramen allows passage of what? Which is a continuation of the ____. CN 2. Retina
Superior orbital fissure allows transmission of what? Which controls what? CN 3-7, control movement of eye and eyelid
Inferior orbital fissure allows transmission of what? Which permits what? Maxillary branch of CN 6. Permits sensory innervation of cheek, nose, upper lip, and teeth
Created by: Zoest35