w13 T spine

how many T vertebrae are there

12

other than the cartilage discs, what do T vertebrae articulate with

the posterior ends of ribs

which T spine are typical

2-8

which T spines are atypical

1, 9-12

body shape

heart

describe the ratio of height and width of the body

equal

describe the slope of the body

anterior is lower, which contributes to the thoracic curve

describe body size as you move down the spine

decreases from 1-3, increases from 4-12

what surface feature is located on each side of the typical body

demi facet

what joints to each demi facet

rib

ribs articulate with the demi facets and facets of the t spines. what joint is this called

costovertebral joint

what is the intervertebral foramina (ie what structures make it up)

hole formed by the superior and inferior vertebral notches

what direction is the intervertebral foramina

90 degrees to the median plane

what position shows the intervertebral foramina open

lateral

describe the transverse processes of the t spine

thick and strong

what surface feature does the transverse process contain

facet

the transverse process has a facet on it. what is the purpose with this

articulates with the posterior rib

the posterior rib articulates with the facet on the transverse process. what joint is this called

costotransverse joint

describe the spinous process of the t spine

thin and long

what direction does the spinous process go

downwards

the spinous process of the t spine are directed downwards and overlap with the lower vertebral body. what purpose does this serve

protective feature

what are the z joints formed by

superior and inferior articulating facets of adjacent vertebrae

what direction are the z joints

20 degrees from the coronal plane (aka 70 degrees from the median plane)

shape of vertebral foramen

circular

are the vertebral foramen smaller or larger than those of the c spine

smaller

describe the facets of T1

has a full facet superiorly, demi facet inferiorly

which rib attaches to the full facet of T1

rib 1

which rib attaches to the demi facet of T1

rib 2

describe the facets of T9 (3)

demi facet superiorly, no facet inferiorly, costal facet on the transverse process

describe the facets of T10 (3)

full facet superiorly, no inferior facet, facet on the transverse process

describe the body size of T11 and T12

larger

describe the facets of T11 and T12

each side contains whole facets, transverse processes have no facets

size of transverse processes of T11 and T12

smaller

what direction are the z joints on T11 and T12

migrate posteriorly

T or F: T1 has only one full facet

false; one full and one demi

T or F: T2-T8 all have two demi facets + a facet on the transverse process

true

T or F: T9 has two demi facets

false; superior demi facet, no inferior

T or F: T9 has a facet on the transverse process

true

T or F: T10 has two demi facets

false; full superior facet, no inferior facet

T or F: T10 has a transverse facet

true

T or F: T11 and T12 have one full facet

true

T or F: T11 and T12 have transverse facets

false