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Ch 9
Radiographic Anatomy
Question | Answer |
---|---|
What's the path the spinal cord travel? | Medulla oblongata, C1, lower border of L1, Conus Medullaris |
What is the Conus Medullaris? | Where the Spinal Cord tapers off to a point. |
Where is the most common site for a lumbar puncture is? | L3-L4 |
What do the Intervertebral Disks do? | Spinal stability, flexibility, & movement of the vertebral column. |
How many sacral bones does a newborn have? | 5 |
How many coccyx bones does a newborn have? | 3-5 |
How many seperate bones in the vertebral column does a child have? | 33 |
How many seperate bones in the vertebral column does an adult have? | 26 |
Concave? | A rounded inward or depressed surface like a "cave". Cervical and Lumbar |
Convex? | A rounded outward or elevated surface. Thoracic and Sacral. |
Lordotic | Concave curvature of the spine. |
Primary curves | Thoracic and Sacral. |
Compensatory curves | Cervical and Lumbar |
What is the purpose of the Primary and Compensatory curves? | Increases the strength & balance of the vertebral column. |
Lordosis | bent backward; abnormally increased "swayback" |
Kyphosis | "humpback"; increased convexity |
Scoliosis | exaggerated lateral curvature |
What are the two main parts of a Vertebra? | Body & Vertebral Arch |
Intervertebral joints are amphiarthroidial or diarthroidial? | Amphiarthrodial |
Where do the Costal joints articulate? | 12 ribs of the Thoracic region. |
What do the Superior Vertebral Arch and Inferior Vertebral Arch form? | Intervertebral Foramen |
Which vertebrae are not seperated by an Intervertebral Disk? Why? | Between C1-C2. C1 has no Body. |
Annulus Fibrosus | The outer fibrous portion of the Intervertebral Disk. |
Nucleus Pulposus | Semigelatinous inner portion of the Intervertebral Disk. |
What are the three unique characteristics of the cervical vertebra? | bifid spinous process tips, overlapping bodies, and the three foraminae on each vertebrae |
Another name for C1 | Atlas |
Another name for C2 | Axis |
Which vertebrae are considered "typical" cervical vertebra? | C3-C6 |
Supportive column of bone in cervical vertebrae | articular pilar |
Column of bone on C1 | lateral mass |
What projection are the Zygopophyseal Joints visualized in the C-spine? | True lateral position; right angles; 90degrees |
What projection are the Intervertebral Foraminae visualized? | 45 degree oblique with a 15 degree cephalad angle |
What articulates with the right and left occipital condyles of the skull? | superior facet of C1 |
Which articulations are between C1 and the occipital condyles of teh skull? | atlantooccipital articulations |
Rotation of the head primarily occurs between C1 and C2, with the ___________ acting as a pivot. | Dens |
Each Thoracic vertebra has two partial facets called... | demifacets |
Each facet or combination of two demifacets accepts the head of the rib to form which type of joint? | costovertebral joint |
On which margin of T1 does it have a full facet and a demifacet? | inferior |
Which margins of T2-T8 contain demifacets? | upper and lower margins |
Which Throacic vertebra has only one demifacet on its upper margin? | T9 |
Which Thoracic vertebrae has full facets? | T10-T12 |
Which joints do ribs 11 and 12 articulate with? | costovertebral joints |
In the Thoracic vertebrae, the zygapophyseal joints form an angle of___________ from the midsagittal plane. | 70-75 degrees |
In the Thoracic vertebrae, the Intervertebral Foramina is best visualized in which position? | true lateral; 90 degrees from MSP |
On the AP C-spine, what is the CR angle used to open up the lower intervertebral spaces? | 20 degrees cephalad |
On the C-spine, the zygapophyseal joints are best visualized in which position? | lateral |
Which position of the C-spine best opens up the foramina on the right side and with a 15 degree cephalad angle? | LPO |
On posterior obliques of the C-spine, which side (upside or downside) opens up the intervertebral foramina? | upside |
On anterior obliques of the C-spine, which side (upside or downside) opens up the intervertebral foramina? | downside |
What is the angle required for an anterior oblique position of the C-spine? | 15 degree caudad |
Where are the zygapophyseal joints located on the C-spine? | between the articular pillars of each vertebra |
In which position of the T-spine best shows the intervertebral foramina? | lateral |
Which oblique angle of the T-spine opens up the zygapophyseal joints? | 70 degrees |
Posterior obliques of the T-spine show the zygapophyseal joints on the upside or downside? | upside |
Anterior obliques of the T-spine show the zygopophyseal joints on the upside or the downside? | downside |