How can we help?

You can also find more resources in our Help Center.

67 terms

Thorax bones, (vertebrae, sternum, ribs, scapula, clavicle)

Lecture 1/18
STUDY
PLAY
medial (vertebral) border
lateral (axillary) border
thickest part of bone
head of scapula (glenoid cavity)
neck of scapula inferior to head
superior angle
supraglenoid tubercle
intervertebral discs
thoracic vertebrae
intervertebral foramina
spinous process
transverse process
superior articular facets
inferior articular facets
pedicles
body
lamina
vertebral foramen
jugular notch (suprasternal notch)
thick, superior border of manubrium
manubrium
(T3-T4) superior part of sternum.
sternal angle of Louis
body of sternum
(T5-T9) width varies-scalloping of its lateral borders by costal notches
xiphoid process
(T10)
Midline marker for superior level of liver, central tendon of diaphram
inferior border border of heart
cartilaginous in young people. Bone after 40.
true (vertebrocostal) ribs
1-7. Attach to sternum with own costal cartilages
false (vertebrochondral) ribs
8-10 cartilage joined to cartilage of rib just superior to them. Indirect connection to sternum
floating ribs
11 & 12. have rudimentary cartilages. not connected, end in posterior abdominal musculature
clavicle
connects upper limb to trunk
sternal end connects with manubrium of sternum.
acromial end joins acromion of scapula.
Medial two thirds of shaft curve anteriorly
lateral third flat and concave anteriorly
medial end
lateral end
superior border
medial two thirds and lateral third-suprascapular notch
inferior angle
lateral (axillary) border
spine of the scapula
continues laterally as flat, expanded acromion
acromion
subcutaneous point of shoulder and connects with acromial end of clavicle
supraspinous fossa
infraspinous fossa
subscapular fossa
costal surface of scapula
glenoid fossa
coracoid process
Beaklike, anchors muscles of the arm
infraglenoid tubercle
C-7 vertebra
start of thorax (thoracic vertebra start after this one) has bony proterberance)
vertebra prominens
start of thorax (C-7)
clavicle notch
each side of jugular notch on manubrium.
articulates with sternal (medial) end of clavicle
sternal angle of Louis
(T4-T5, level of 4th disc) opposite second pair of costal cartilages. Clinical landmark (between manubrium & body)
costal notches
articulation with costal cartilages
How many thoracic vertebra?
12
Ribs
curved, flat bones, contain bone marrow
three types of ribs
True (vertebrocostal) ribs
False (vertebrochondral) ribs
Floating (free) ribs
head
wedge-shaped & 2 facets, separted by crest of head.
1 facet for vertebra superior to it
1 facet for connecting numerically corresponding vertebra
Neck
connects head with body (shaft) at level of tubercle
tubercle
junction of neck and body.
(smooth articular part) for connecting corresponding transvers process of vertebra

(rough nonarticular part) for attachment of costatransverse ligament
body (shaft)
thin, flat, curved, most markedly at angle. also has costal groove
angle
where rib turns anterolaterally
costal groove
protects intercostal nerve, vessels
atypical ribs
(1,2, 10-12) are dissimilar
1st rib
broadest (body widest, nearly horizontal)
shortest, most sharply curved.
2 grooves crossing superior surface for subclavian vessels, separated by scalene tubercle and ridge.
one facet on head
2nd rib
thinner, less curved, much longer than first rib.
2 facets on head for T1-T2 vertebrae
10th - 12th rib
one facet on head
11th & 12th rib
short, no necks or tuberclesq
costal cartilages
contribute to elasicity of wall.
intercostal spaces
separate ribs and cartilages from one another. spaces and neurovascular structures are named according to rib forming superior border of space. 11 spaces and nerves.
subcostal space
below 12th riband anterior ramus of spinal nerve T12 is the subcostal nerve
What is scapula and clavical part of?
pectoral girdle
scapula
lays over 2-7 ribs,
lies on posterolateral of thorax
posterior surface of scapula
unevenly divided by spine of scapula
into small supraspinous fossa
larger infraspinous fossa
triangular body of scapula
thin, translucent, superior and inferior to scapular spine
Scapula borders are
medial (axillary)
lateral (vertebral)
superior borders
superior, inferior angles
Clavicle purpose
serves as strut (rigid support)
keeps limb away from thorax
enables elevation of ribs for deep inspiration

forms a boundary of cervicoaxillary canal for protection of neurovascular bundle supplying upper limb

transmits shocks from upper limb to axial skeleton

No bone marrow, has spongy bone with shell of compact bone. But considered long bone
conoid tubercle
Present on the inferior surface of the lateral end of the clavicle
xiphos means
sword