Intervertebral Foramen

Question 1

What determines the length of the intervertebral foramen?

Answer 1

the width of the pedicle

Question 2

What is the average height of the intertransverse foramen?

Answer 2

about 13 mm

Question 3

What percent of total vertebral column length does “true” intervertebral foramina height from C2-S1 equal?

Answer 3

40%

Question 4

What percent of total vertebral column length does all intervertebral foramina height from occiput-Co1 equal?

Answer 4

53%

Question 5

What are the generic contents of the intervertebral foramen?

Answer 5

neural tissue, connective tissue, vascular tissue, lymphatic tissue

Question 6

What is the percent of the neural tissue in the intervertebral formamen?

Answer 6

from 8 to 50 percent

Question 7

What are medulally feeder arteries?

Answer 7

enlarged radicular arteries which join the arterial vasa corona to provide blood for the spinal cord

Question 8

What is the name of the largest medullary feeder artery?

Answer 8

the artery of Adamkiewicz or the arteria radicalis magna anterior

Question 9

What are the characteristics of the Artery of Adamkiewicz?

Answer 9

it is a left side, anterior medually feeder artery, located in the T9/T10 intervertebral foramen, and the primary vascular supply to the lumbar enlargement

Question 10

What veins drain the nerve roots toward the intervertebral foramen?

Answer 10

the anterior and posterior radicular veins

Question 11

What is a unique histological feature of the veins of the vertebral column?

Answer 11

the appear to lack valves

Question 12

What size lymphatics vessels lies in the intervertebral foramen?

Answer 12

medium sized lymphatics

Question 13

What types of connective tissue will be present in the intervertebral foramen?

Answer 13

adipose tissue and loose areolar connective tissue

Question 14

What parts of the cervical vertebra will modify the intervertebral foramen?

Answer 14

the lateral groove and uncinate process

Question 15

What happens to cervical nerve roots between their origin from the spinal cord and exit from the intervertebral foramen?s as it des

Answer 15

the descend along the spinal cord

Question 16

What is the relationship between aging and cervical spine nerve root characteristics?

Answer 16

the length of the nerve root increases as it descends from its apparent origin on the spinal cord, but the cross-sectional area of the nerve root decreases

Question 17

What is the relationship between aging and cervical spine intervertebral foramen size?

Answer 17

the cross-sectional area diminishes after age 50

Question 18

What are the specifics attachment sites for a cervical spinal nerve?

Answer 18

the sulcus for the ventral primary ramus on the costotransverse bar & the vertebral artery

Question 19

What contributes to the anterior boundary of the thoracic intervertebral foramen?

Answer 19

costotransverse joint

Question 20

What are the largest spinal nerves?

Answer 20

L5 and S1 spinal nerves

Question 21

What increases the length of the intervertebral foramen oat L5?

Answer 21

lumbosacral tunnel

Question 22

What forms the lumbosacral tunnel?

Answer 22

lumbosacral ligament, transverse process of L5 and sacral ala

Question 23

What condition is the result of encroachment on the L5 spinal nerve?

Answer 23

the far out syndrome