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Thoracic Spine
Functional Anatomy
80
Anatomy
Graduate
09/18/2014

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Cards

Term
What is the most rigid area of the spine?
Definition
thoracic
Term
The thoracic spine has less segmental mobility in favor of what?
Definition
protection of viscera
Term
Each vertebra of the thoracic spine has how at least how many articulations?
Definition
6
Term
What happens as a result of having at least 6 articulations per vertebra
Definition
difficult for diagnostic accuracy
Term
The thoracic spine is a common area for this disease
Definition
joint degenerative
Term
These types of injuries are rare in the thoracic spine
Definition
symptomatic disc
Term
What must one consider as a source of pathologies when considering the thoracic spine?
Definition
ribs
Term
How may pairs of ribs are there
Definition
12
Term
THe upper 10 ribs are connected how to the vertebra
Definition
anteriorly by way of costal cartilage
Term
THe upper 10 ribs articulate with the vertebra how
Definition
posteriorly
Term
THe lower 2 ribs are considered
Definition
floating
Term
What are the 3 thoracic articulations
Definition
intervertebral, costovertebral, costotransverse
Term
What are the 4 ligaments of rib articulations
Definition
articular capsule, radiate ligament, Anterior longitudianl ligament, consotransverse ligament
Term
1-3 Transverse Process and Spinous Processes
Definition
same level
Term
4-6 Transverse Process and Spinous Processes
Definition
TP 1/2 lvl above SP
Term
7-9 Transverse Process and Spinous Processes
Definition
TP 1 full level above SP
Term
10 Transverse Process and Spinous Processes
Definition
TP 1 full level above SP
Term
11 Transverse Process and Spinous Processes
Definition
TP 1/2 level above the SP
Term
12 Transverse Process and Spinous Processes
Definition
TP same level as SP
Term
The facets of the thoracic vertebra are oriented at
Definition
60 degrees
Term
What two thoracic vertebra are considered transitional?
Definition
t1 and t12
Term
c7/t1 junction
Definition
cervicothoracic junction
Term
t12/l1
Definition
thoracolumbar junction
Term
What is the axis of motion for the thoracic spine
Definition
t6
Term
compared to lumbar and cervical discs thoracic discs are
Definition
flatter and narrower
Term
weightbearing shifts from facets to discs at approximately
Definition
t3
Term
the region of the narrowing of the canal is approximately where
Definition
t4 and t5
Term
What are the 6 muscles of the thoracic region
Definition
spinalis, longissimus, semispinalis, multifidus, intertransversarii, iliocostalis
Term
action of the spinalis
Definition
extension
Term
action of the longissimus
Definition
ext, ipsilateral sidebending
Term
action of the semispinalis
Definition
extension, contratlateral rotation
Term
action of the multifidus
Definition
extension, contralateral rotation
Term
action of the intertransversarii
Definition
ipsilateral sidebending
Term
action of the iliocostalis
Definition
extension, ipsilateral sidebending
Term
3 degrees of freedom for thoracic spine
Definition
flexion/extension, sidebending, rotation
Term
Due to the orientation of the facets of the thoracic spine, the thoracic spine is best suited to allow what movement
Definition
rotations and sidebending
Term
What limits sidebending in the thoracic spine
Definition
approximation of the ribs
Term
In the thoracic spine rotation and sidebending occur
Definition
to opposite sides
Term
When the thoracic spine is positioned in the extreme of flexion or extension, rotation and sidebending occur
Definition
same side
Term
type 1 motion
Definition
sidebending and rotation occur in the opposite direction
Term
type 2 motion
Definition
sidebending and rotation occur in same side
Term
Extension of the thoracic spine is produced principally by what
Definition
lumbar extensors
Term
Extension of the thoracic spine is produced principally by the lumbar extensors and results in what
Definition
inferior glide of the superior facet of the zygapophyseal joint
Term
How much extension is available at each thoracic segment
Definition
1-2 degrees
Term
Overall average of thoracic extension for the entire thoracic spine
Definition
15-20 degrees
Term
Sidebending of the thoracic spine is initiated by what
Definition
ipsilateral abdominals, erector muscles
Term
Sidebending of the thoracic spine is continued by what
Definition
gravity
Term
How much sidebending is available in the thoracic spine?
Definition
25-45 degrees
Term
On average each segment provides how much side bending?
Definition
3-4 degrees
Term
THe lower thoracic segments of the thoracic vertebra provide how much sidebending each
Definition
7-9 degrees
Term
Axial rotation of the thoracic spine is produced by
Definition
abdominal muscles, other trunk rotators, unilateral elevation of the arm
Term
Pure axial rotation can only occur at what 2 points
Definition
thoracolumbar, cervicothoracic junctions
Term
Total thoracic rotation (degrees)
Definition
35-50
Term
Thoracic Zygoapohyseal Arthrokinematics: Flexion
Definition
inferior facets of the superior segment glide up and forward
Term
Thoracic Zygoapohyseal Arthrokinematics: Extension
Definition
inferior facets of the superior segment glide down and back
Term
Thoracic Zygoapohyseal Arthrokinematics: Sidebending right
Definition
inferior facets of the superior segment glide down and back on right and up and forward on left
Term
Thoracic Zygoapohyseal Arthrokinematics: rotation right
Definition
facet segments gap on the right and approximate on left
Term
The upper ribs move primarily how
Definition
pump handle motion
Term
The pump-handle motion is similar to
Definition
flexion/extension
Term
The middle ribs move primarily in a
Definition
bucket-handle motion
Term
The bucket handle motion is similar to what
Definition
ab/adduction
Term
The lower ribs move in a
Definition
caliper like motion
Term
The caliper like motion is similar to what
Definition
internal/external rotation
Term
The constotransverse and constovertebral joints move how
Definition
with movements of the thoracic vertebrae
Term
Forward rotation/flexion of teh superior vertebra couples with anterior translation and "pulls" the superior aspect of teh head of the rib forward at the costovertebral joint resulting in
Definition
anterior rotation of the head of the rib
Term
The anterior rotation of the neck of the rib results in what
Definition
superior glide of the tubercle at the costotransverse joint
Term
The superior glide fo the tubercle at the costotransverse joint results in what
Definition
anterior rotation of the neck of the rib
Term
The backward/sagittal rotation/extension of the superior vertebra couples with the posterior translation and "pushes" the superior aspect of the head of the rib...
Definition
backward at the costovertebral joint
Term
THe head of the rib moving backward as a result of being pushed induces
Definition
posterior rotation of the head of the rib
Term
THe posterior rotation of the neck of the rib results as a result of thoracic extension results in what
Definition
an inferior glide of the tubercle at the costotransverse joint
Term
The inferior glide of the tubercle of the tubercle results in
Definition
posterior rotation of the neck of the rib
Term
As the thorax bends to the right, the ribs
Definition
approximate to the right
Term
What stops first in sidebending, rib motion or thoracic vertebrae?
Definition
rib motion
Term
What occurs as the vertebra sidebends right against the flexed ribs at the costotransverse joints
Definition
superior glide of the tubercle of the right rib and relative inferior glide of the left rib
Term
Since the costotransverse joint is concacoconvex, the superior glide of the rib also produces
Definition
anterior rotation of the neck of the rib
Term
Right rotation: As the superior thoracic vertebra rotates to the right it translates to the
Definition
left
Term
Right rotation: As a consequence of vertebral rotation, the right rib posteriorly rotates and the left rib
Definition
anteriorly rotates
Term
Where does the thoracic spine begin at clinically
Definition
t3
Term
t1 and t2 are typically examined as part of what
Definition
cervical exam
Term
Examine the cervical spine first, unless pain is referred distal to what
Definition
inferior angle of scapula
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