skull and facial bones Flashcards
skull made of _____ bones
___ cranial and _____ facial bones
22
8
14
bones that are apart of the orbit (7)
sphenoid bone
zygomatic bone
maxilla
palatine bone
lacrimal bone
ethmoid bone
frontal bone
paranasal sinuses
4 total
Frontal(1) and sphenoid(2) sinuses can be located in a sagittal section with the nasal septum removed
superior and middle nasal conchae are belonging to ______
inferior nasal conchae is a separate bone
ethmoid bone
foramina (7 that you need to know)
Foramen magnum (occipital)
Jugular foramen
(occipital/temporal)
Nasolacrimal canal (Maxillary/lacrimal)
Internal acoustic foramen (temporal)
Foramen ovale (sphenoid)
Incisive foramen (Maxilla)
Olfactory foramina(ethmoid)
zygomatic process
1.Temporal process of zygomatic bone
- Zygomatic process of temporal bone
parts of the temporal bone:
zygomatic process
mastoid process
styloid process
mandibular fossa
mandibular fossa
-isan oval depression behind the anterior root of the zygomatic process of temporal bone for the reception of the condyle of the mandible
ethmoid bone is the most ______ bone of the orbit
posterior
parts within the ethmoid bone (5)
- cribriform plate
-crista galli
-perpendicular plate
-superior nasal concha
-middle nasal concha
inferior nasal concha
does NOT belong to ethmoid bone
-has same function as superior and middle nasal concha
sphenoid bone - features
-sella turcica
-greater wing
-lesser wing
-anterior clinoid process
-posterior clinoid process
foramen magnum
It is one of the several oval or circular apertures in the base of theskull(theforamina).
It is the foramen magnum through which thespinal
cord(an extension of themedulla oblongata) enters and exits the skull vault.
occipital condyles
Occipital condyles articulate with the superior facets of theatlasvertebra.
occipital bone - features
-occipital condyles
-external occipital protuberance
sutures
Dense fibrous connective tissue joints
-sagittal suture
-coronal suture
-lambdoid suture
-squamous suture
mandible - features
- horizontal body and ascending ramus
-angle
-condylar process
-coronoid process
condylar process articulates with
Condylar process articulates with mandibular fossa of temporal bone at TMJ
coronoid process is the site of attachment for
Coronoid process is the site of attachment of temporalis muscle (mm of mastication)
palatine bone is a part of
orbit
palate
oral cavity
^only one that is all three
hyoid bone
-does not articulate with any other bone
-suspended by ligaments and muscles from the styloid process of temporal bone
-located in the anterior part of neck between mandible and larynx
hyoid bone
provides attachment points for muscles of
neck, tongue and pharynx
vertebrae number and division
33
cervical - 7
thoracic - 12
lumbar - 5
sacral - 5
coccyx - 3-5
vertebral body is made of
Body
Lamina
Pedicle
Processes:
spinous,
transverse
Vertebral foramen
Cervical vertebrae C1-C7
atypical?
features?
-have transverse foramina
Atypical : C1, C2, C7
C1 is missing body and spinous process.
C2 has dens and bifid spine
C7 has a prominent non-
-bifid spinous process
Most degree of movement
skull on atlas =
yes motion of head
atlas on axis =
no motion of head
thoracic vertebrae T1-T12
features?
The only vertebrae
that have articular facets (demifacets) for the articulations of ribs
lumbar vertebrae L1-L5
Largest, bear weight
have no articular
facets for rib
attachment
ribs
how many
12 pairs
The ribs that articulate with sternum directly are called true ribs …
1-7
Others do not articulate with sternum…. are called false ribs
8-10
___ and ____ ribs are floating
11 and 12
any typical rib is subdivided into
Head with with 2 articular facets.
Neck.
Tubercle.
Angle.
Costal groove.
Facet for costal cartilage
sternum
parts:
manubrium
body
xiphoid process
attachments of sternum and other features
manubrium articulates with ______
clavicle
attachments of sternum and other features
jugular notch is located between the ___________
2 clavicular notches
attachments of sternum and other features
manubrium also articulates with ___________
costal cartilages of first rib
attachments of sternum and other features
body articulates superiorly with manubrium via ________
sternal angle
attachments of sternum and other features
sternal angel is attachment of _________
second rib
