Exam 2 Inter-Vertebral Foraman Flashcards
What is the average height of the inter-vertebral foramen
About 13 mm
What percent of total vertebral column length does true intervertebral foramina height from C2 through S1 equal
40%
What percent of total vertebral column length does all intervertebral foramina height from occiput through co1equal
53%
What are the generic contents of the inter-vertebral foramen
Neural tissue connective tissue vascular tissue lymphatic tissue
What is the percent of Neural tissue in the intervertebral foramen
From 8 to 50%
What are the characteristics of the artery of Adamkiewicz
It is a left side interior medullary feeder Artery located in the T9 T10 intervertebral foramen and the primary vascular supply to the lumbar enlargement
What will the intervertebral veins drain into
The external vertebral venous plexus or Batsons plexus
What is a unique histological feature of the veins of the vertebral column
They appear to lack valves
What size lymphatic vessel lie in the intervertebral foramen
Medium size lymphatics
What types of connective tissue will be present in the intervertebral foramen
Adipose tissue and loose areolar connective tissue
What parts of the cervical vertebra will modify the Intervertebral foramen
The lateral groove and uncinate process
What happens to the cervical nerve roots between their origin from the spinal cord and exit from the intervertebral Foramen
They descend along the spinal cord
What determines the length of the intervertebral foramen
The width of the pedicle
What is the shape of the lumbar intervertebral foramen
Reniform or earlobe shape
What is the relationship of lumbar nerve root size to enter vertebral foramen side below L4
The nerve root size will account for less than 22% of the available size
What is the relationship of lumbar nerve root size to inter vertebral foramen size below L4
The nerve root size will account for up to 30% of the available size
What are the largest spinal nerves
L5 and S1 spinal nerves
What increases the length of intervertebral foramen at L5
The lumbosacral tunnel
What forms the lumbosacral tunnel
The lumbosacral ligament
transverse process of L5
sacral all
What condition is the result of encroachment on L5 spinal nerve
The far out syndrome
What is the relationship between intervertebral disc herniation and lumbar spinal nerves
The intravertebral disc above the intervertebral foramen is usually the source of damage
What is unusual about the sacral intervertebral foramen compared to other intervertebral foramina
A completely osseous boundary exists
What is more likely the cause of nerve irritation at the sacral intervertebral foramen
The tilt or position of the entire sacrum relative to the pelvis
What is the relationship of the lumbar nerve roots size to intervertebral foramen size above L4
The nerve root size will account for less than 22% of the available space
