Skull-Facial Bones and Sinuses

Skull-Facial Bones and Sinuses Hom many bones in the cranium Correct Answer: 8 How many facial bones Correct Answer: 14 Four bones of the calvaria? Correct Answer: Frontal, R and L Parietal and Occipital Four bones of the cranium Correct Answer: R and L Temporal, spheniod, ethmoid Small horizontal plate of the ethmoid Correct Answer: Cribiform plate Vertical plate of the ethmoid bone Correct Answer: Perpendicular plate Structure found in the middle of the sphenoid bone that surrounds the pituitary gland Correct Answer: Sella tercica Posterior aspect of the sella tercica Correct Answer: Dorsum sellae What structure of the sphenoid bone allows for the passage of the optic nerve Correct Answer: Optic foramen Which structures of the sphenoid bone help form part of the lateral walls of the nasal cavity? Correct Answer: Medial and lateral pterygoid What position/projection best shows the sella tercica? Correct Answer: Lateral Which aspect of the frontal bone forms the superior aspect of the orbit? Correct Answer: Orbital or horizontal Anterior Correct Answer: Bregma Posterior Correct Answer: Lambda R & L sphenoid Correct Answer: pterion R & L Mastoid Correct Answer: asterion CRanial sutures are classified as Correct Answer: Fibrous Small irregular bones that sometimes develop in an adult skull Correct Answer: sutural or wormian (usually found in the lambdoidal suture What term describes the superior rim of the orbit? Correct Answer: Supraorbital margin (SOM) What is the name of the notch that separates the orbital plates from each other? Correct Answer: Ethmoidal notch Which cranial bones form the upper lateral walls of the calvarium Correct Answer: Right and Left parietals Which bone contains the foramen magnum? Correct Answer: Occipital A small prominence located on the sqamous portion of the occipital bone called the ----- Correct Answer: External occipital protuberance What is the name of the oval processes found on the occipital bone that helps form the occipito-atlantal joint? Correct Answer: Occipital condyles or lateral condylar portion Three aspects of the temporal bones Correct Answer: Squamous, mastoid, petrous What external landmark corresponds with the level of the ptrous ridge? Correct Answer: Top of the ear TEA Which opening is in the temporal bone serves as a passageway for nerves of hearing and equilibrium? Correct Answer: Internal acoustic meatus Which aspect of the temporal bone is the densest? Correct Answer: Petrous portion Which structure makes up the cartilaginious external ear? Correct Answer: Auricle or Pinna Which small membrane marks the begining of the middle ear? Correct Answer: Tympanic membrane collective term for the small bones of the middle ear? Correct Answer: Auditory ossicles What structure allows for communication between the nasopharynx and middle ear? Correct Answer: Eustachian What is the major function of the structure the eustachian? Correct Answer: Equalize atmospheric pressure in the middle ear What structure serves as an opening between the mastoid portion of the temporal bone and the middle ear? Correct Answer: Aditus NAme of the thin plate of bone that separates the mastoid air cells from the tympanic membrane? Correct Answer: Tegmen tympani Which one of the auditory ossicles is consideered to be the smallest? Correct Answer: stapes which auditory picks up vibrations Correct Answer: Malleus Which auditory ossicles looks like a tooth Correct Answer: Incus Name of the small membrane that connects the middle ear to inner ear? Correct Answer: Oval or vestibular window which two sensory functions occur within the inner ear? Correct Answer: Hearing and equilibrium Small membrane that will move outward to transmit impulses to the auditory nerve creating hearing? Correct Answer: Round or cochlear window The cochlea is a closed system relating to the sense of hearing? Correct Answer: True Radiographic appearances pertains to an acoustic neuroma? Correct Answer: Expansion of the internal acoustic canal Which modality best demonstrates otosclerosis? Correct Answer: CT Mesocephalic Correct Answer: width between 75% and 80% of length Brachyocephalic Correct Answer: width 80% or more than length Dolichocephalic Correct Answer: Width less than 75% of length CR angles and degree of rotation stated for basic skull positions are based on the ------ Correct Answer: mesocephalic which has an angle of 47 degrees between midsagittal plane and the long axis of the petrous bone The long narrow shaped skull has an angle of + or - Correct Answer: 40 degrees between the midsagittal plane and the long axis of the petrous bone There is a 7-8 degree difference between the orbitomental line (OWL) and infraorbitomeatal lines and 7-8 degree between the orbitomeatal and glabellomental lines Correct Answer: true Lateral junction of the eyelid Correct Answer: outer canthus Posterior angle of the jaw Correct Answer: Gonion