Jennifer Hodges

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What separates the frontal bones from the two parietal?

Coronal Suture
What separates the two parietal bones in the midline?

Sagittal Suture
What separates the two parietals from the occipital bone?

Lambdoidal Suture(posteriorly)
What are the names of the fontanels in children and what do they become in adults?
- Anterior Fontanel-Bregma
- Posterior Fontanel-Lambda
- R-Sphenoid Fontanel-R-Pterion
- L-Sphenoid Fontanel-L-Pterion
- R-Mastoid Fontanel-R-Asterion
- L-Mastoid Fontanel-L-Asterion
What are infant fontanels called and what do they turn into when they are adults?
- Infant-Soft Spot
- Adult-Junction Point
What is another name for the ear drum?

Tympanic Membrane
What acts as a partial shield to the ear opening?

Tragus
What is the passageway between the middle ear and nasopharynx?

Eustachian Tube-Passageway for disease and organisms from throat to middle ear and also equalizes air pressure.
What serves as an opening between the mastoid air cells and the middle ear?

Aditus
What are considered the Auditory Ossicles?
- Malleus (Hammer)
- Incus ( Anvil)
- Stapes (Stirrup)
What relate to the sense of direction or equilibrium?

Semicircular canals
What relate to the sense of hearing?

Cochlea
What makes up the floor of the cranium?
- L&R Temporal bones
- Sphenoid
- Ethmoid
What makes up the calvaria (skull cap)?
- Frontals
- R&L Parietals
- Occipital
What is the widest portion of the skull?

Parietal Tubercles (Eminence)
What is the smoothed raised prominence between the eyebrows just above the bridge of the nose?

Glabella
What is the slight depression above the eyebrow?

Supraorbital Groove (SOG)
What is the superior rim of each orbit called?

Supraorbital Margin (SOM)
What is the most dense of the three aspects of the temporal bone?

Petrous Portion
What is the ridge under the eyebrow called?

Superciliary Ridge (Arch)
What is the small hole or opening within the supraorbital margin where the supraorbital nerve and artery pass through

Supraorbital Notch (Foramen)
What is a larger rounded prominence above the supraorbital groove?

Frontal Tuberosity (eminence)
What is the importance of the Top of the Ear Attachment (TEA)?

It is an important landmark that corresponds with the level of the petrous ridge
What is the name if the notch that separates the orbital plates from each other?

Ethmoid Notch
What houses the pituitary gland?

The spheniod bone(sella turcica)
What foramens are found in the sphenoid bone?
- Foramen Rotundum (Round)
- Foramen Ovale (Oval)
- Foramen Spinosum
- Small openings in the greater wings for passage of certain cranial nerves
The small upper horizontal portion of the Ethmoid Bone is called what?

Cribiform Plate ( contains many small openings through which branches of the olfactory nerves pass)
What projects superiorly from the Cribiform Plate?

Crista Galli (Looks like roosters comb)
What helps to form the nasal bony septum?

Perpendicular Plate
What contains the ethmoid air cells and helps to form the walls of the orbits and nasal cavities?

Lateral Labyrinths (Masses)
What makes up the floor of the cranium?

Temporal Bones
Which cranial bones form the upper lateral walls of the calvarium?

R&L Parietals
What houses the organs of hearing and equilibrium?

The internal Ear
What does the Eustachian tube connect?

The middle ear and the nasopharynx
What is another name for occipital protuberance?

Inion
What is the portion of the brain most vulnerable to fractures?

Squamous Portion of the Temporal Bone

Author

JenniferHodges

62098

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Jennifer Hodges

Description

Skull and Cranial Bones Ch 12

Updated

2011-01-26T04:55:00Z