Axial Skeleton Flashcards
Axial Skeleton composed of the following bones:
Skull
Auditory Ossciles
Hyoid bone
Vertebrae
Thoracic Cage
how many bones in skull?
22
how many bones are in auditory ossicles?
6
how many bones are in hyoid bone?
1
how many bones are im vertebrae?
26
how many bones are in thoracic cage?
25
total axial bones
80
bone markings classified into three:
articulating
non-articulating
depressions and opening
articulating
head
condyle
facet
enlarged end
head
smooth rounded articular surface
condyle
smooth flattened surface
facet
non-articulating
tuberosity
process
crest
tubercle
line
knob/enlargement
tuberosity
prominent projection
process
prominent ridge
crest
small rounded projection
tubercle
elongated ridge
line
depressions and openings
foramen
fossa
meatus
fissure
sinus
opening/hole
Foramen
depression
fossa
tunnel-like opening
meatus
cavity
sinus
cavity
sinus
cleft
fissure
The skull has 22 bones and is divided into two
parts:
a) Calvarium/Cranium
b) Cranial base/ Facial bones
STEP OF 8
Sphenoid
Temporal
Ethmoid
Parietal
Occipital
Frontal
Forms forehead, superior part of orbits, and most of the anterior cranial fossa; contains sinuses
Frontal bone
Parts of frontal bone
Squamous
Supraorbital margins
Supraorbital foramen
Glabella
forehead, the most anterior part of the frontal area
squamous
thickened part which lie under the eyebrows. This is where the forehead ends.
Supraorbital margin
passageway of supraorbital artery and nerves.
Supraorbital foramen
Form most of the superior and lateral aspects of the skull
Parietal bones
Form most of the superior and lateral aspects of the skull
Parietal bones
interlocking joints of the skull
Sutures
parts of the parietal bones
Coronal suture
Lamboid suture
Squamous suture
Sagittal suture
joint between the parietal and frontal bone.
coronal suture
joint between the parietal and occipital bone.
Lamboid suture
joint between the parietal and temporal bone.
Squamous suture
joint between two parietal bones.
Sagittal suture
Form inferolateral aspects of the skull and contribute
to the middle cranial fossa
Temporal bone
Best viewed on lateral position
Temporal bones
major parts of temporal bones
Squamous
Tympanic
Petrous
Mandibular fossa + Condylar Process (mandible) =
Temporomandibular joint
temporal bone - squamous
zygomatic arch
TMJ
when the zygomatic process of the
temporal bone meets the zygomatic bone, it forms an arch
zygomatic arch
condylar process of the
mandible articulates with the mandibular fossa
Temporomandibular joint