RTE Anatomy of the skull 1533
what is the name of the oval processes on each side of the foramen magnum
Occipital condyles ( condylar portions)
Name the two bones consisting the superior sides of the skull
Right and left parietal bones
Arch that extends from the frontal bone all the way back to the temporal bone
Zygomatic arch
wedge between two orbital plates on the frontal bone
cribrifrom plate
what is the large opening at the base of the skull?
foramen magnum
Single bone forming the forehead
frontal bone
name the bone at the back of the skull
occipital bone
what parts of the spheinoid bone are triangular in shape
the lesser wings
what are the main parts of the internal ear?
the osseous or bony labyrinth and the membranous labyrinth
what forms the widest portion of the skull?
the parietal tubercles, also called eminences
what cranial bone houses the hearing and balance structures?
the temporal bone
the middle ear is composed of
the tympanic membrane, three auditory ossicles and, the tympanic cavity
what are the functions of foramina in the skull?
to allow passage of nerves and blood vessels
what is the function of the skull?
to protect and enclose the brain
each parietal bone articulate with
5 bones. frontal bone, both temporal bones, sphenoid bone and opposite parietal bone
number of bones at the base of the skull
5 bones. frontal bone, sphenoid bone, right and left temporal bones, and occipital bone
Number of facial bones
14
number and name of fontanels on an infant
6 fontanels, anterior fontanel, posterior fontanel, right and left sphenoid fontanel, right and left mastoid fontanel
number and name of fontanels on an adult
6 fontanels, bregma,----------------------------(top of skull) lambda,----------------------------( back of skull) right and left pterion,-------------(sides of skull ) right and left astrion--------------(lower back of skull)
Number of cranial bones
8
what part of the ethmoid bone is also called "Rooster's Comb"?
The crista galli
the external part of the ear is composed of
auricle or pinna, tragus and EAM
name the suture formed by the frontal bone and the two parietal bones
coronal suture
what is the name of the rounded prominence on the squamous portion of the frontal bone
frontal tuberosity
smooth raised prominence between the eyebrows
gabella
name the suture formed by the two parietal bones and the occipital bone
lambdoidal suture
flat sheet of bone that extends down in the midline of the cribriform plate and forms part of the nasal septum
perpendicular plate (etmoid bone)
what is the thickest part of the temporal bone?
petrous ridge , shaped as a pyramid
name the six bones that articulate with the occipital bone
right and left parietal bone, right and left temporal bones, sphenoid bone and the atlas
name the 4 bones that articulate with the frontal bone
right and left parietal bones, sphenoid bone, and the ethmoid bone
name the suture formed by the two parietal bones
sagital suture
what is the name of saddle like structure that protects the pituitary gland?
sella turcica
what bone articulates with all seven cranial bones
sphenoid bone
what is the thinnest part of the skull and most vulnerable to fracture?
squamous portion
name of the 2 processes of the temporal bone
styloid process and mastoid process
name of the slight depression (groove) above each eyebrow
supraorbital groove
The connection of skull bones is called
suture
what bone lies primarily below the floor of the cranium?
the ethmoid bone
where are the Lateral Labyrinths located?
the ethmoid bone
these two part of the sphenoid bone,form part of the floor and lateral walls of the skull
the greater wings
what is the prominent bump or protuberance and the inferosuperior portion of the skull? on the occipital bone.
the inion, also called external ocipital protuberance