AXIAL SKELETON (EXAM1) Flashcards
Major sutures of the skull
Coronal suture: between frontal and parietal bones
Sagittal suture: between right and left parietal bones
Lamdoid suture: between parietal bones and occipital bone
Squamous suture: between temporal and parietal bones
regions of vertebral column and the amount of vertebrae in each region
Cervical region: 7 vertebrae: C1-C7
Thoracic region: 12 vertebrae: T1-T12
Lumbar region: 5 vertebrae: L1-L5
Sacrum
-1 sacrum formed from fusion of five vertebrae (S1-S5)
(Fusion occurs by mid 20’s)
Coccyx (tailbone)
1 tailbone formed from 4 coccygeal (CO1-C04)
fusion occurs around age 25
SEE POWERPOINT
Define scoliosis
abnormal lateral curvature See powerpoint
Define kyphosis
exaggerated lumbar curvature (swayback) see powerpoint
Define lordosis
exaggerated thoracic curvature (hunchback)
see powerpoint
Know articulation points between occipital bone and atlas and between axis and atlas
Atlas (1st Cervical Vertebra) - Articulates with occipital condyle to make “ yes “ motion
Axis (2nd Cervical Vertebra) - Articulates with C1 to allow for “no” motion
Know parts of the intervertebral disc (annulus fibrosus and nucleos pulposus) and explains the condition of a ruptured disc
anulus fibrosus: outer ring of fibrocartilage
nucleus pulposus: gelatinous consistency in the middle
Condition of a ruptured disc:
- Bulging disc or herniated disc caused by distortion of anulus fibrosus
- Disc then bulges to push on nearby nerve
- This cause discomfort
Identify true false and floating ribs
true ribs 1-7
false ribs 8-12
floating ribs 11-12
how do ribs articulate with a vertebra and sternum
vertebra:
•Costal facet or demifacets to articulate with tubercle and head of ribs
•each vertebra joins a rib
sternum:
•Articular costal notches: articulate with ribs 2-7
Function of foramen magnum (occipital bone)
exit for spinal cord
function of occipital condyles (occipital bone)
articulate with first cervical vertebra
function of inferior and superior nuchal lines (occipital bone)
attachment of muscle and ligaments to stabilize joint between occipital condyles and C1
function of jugular foramen (occipital bone)
internal jugular vein passes through
function of external occipital protuberance (occipital)
attachment of ligamentum nuchae
function of superior and inferior lines (parietal bone)
attachment of temporalis muscle
function of parietal eminence (parietal bone)
attachment of scalp to skull
function of frontal crest (frontal bone)
attachment of meninges to stabilize the brain
function of lacrimal fossa (frontal bone)
location of the lacrimal gland
function of superciliary arches (frontal bone)
support the eyebrows
function of supraorbital margin (frontal bone)
superior limit of orbit
function of zygomatic process of the frontal bone
where frontal bone meets zygomatic bone
function of hypoglossal canal (frontal bone)
passage way of hypoglassal nerve
function of zygomatic process (temporal bone)
extension that meets the zygomatic bone to form zygomatic arch