Exam 2: Intervertebral Foramen Flashcards
What determines the length of the IVF
Width of pedicle
What may extend length of IVF
Transverse process, muscles or ligaments
What forms the superior boundary for the typical IVF
Inferior vertebral notch of pedicle above
What is the average height of the IVF
13mm
What percent of total vertebral column length does “true” IVF height rom C2-S1 equal?
40%
What percent of total vertebral column length does all IVF height from occiput- Co1 equal
53%
What are the generic contents of the IVF
Neural tissue
CT
Vascular tissue
Lymphatic tissue
What is the percent of neural tissue in IVF
8-50%
Which branches of spinal artery may occupy IVF
Osseous arteries Ant spinal canal artery Post spinal canal artery Ant medullary feeder artery Post medullary feeder artery
What is the name o largest medullary feeder artery
Artery of Adamkiewicz
Arteria radicalis magna anterior
What are the characteristics of the artery of Adamkiewicz
Left side
Anterior medullary feeder artery
T9/T10 IVF
Primary vascular supply to lumbar enlargement
What is most likely region of thoracic spine for herniation
Below T8
What will IV veins drain into
External vertebral venous plexus
Batson’s plexus
Which venous vessels of vertebra will drain into segmental veins
Batson’s plexus
What is unique histological feature of veins of vertebral column
Appear to lack valves
What size lymphatic vessels lie in IVF
Medium sized
What types of CT will be present in IVF
Adipose
Loose areolar CT
What happens to cervical nerve roots between origin from spinal cord and exit from IVF
Descend along spinal cord
What is the relationship between aging and cervical spine nerve root characteristics
Length of nerve root increases as it descends from apparent origin on spinal cord, but cross sectional area of nerve root decreases
What is the relationship between aging and cervical spine intervertebral foramen size
Cross-sectional area diminishes after age 50
Specific attachment sites for a cervical spinal nerve
Sulcus for ventral primary ramus on costotransverse bar
Vertebral artery
What contributes to anterior boundary of thoracic IVF
Costocentral joint
Relationship of lumbar nerve root size to IVF size above L4
Nerve root size accounts for less than 22% of available size
Relationship of lumbar nerve root size to IVF size below L4
Nerve root size accounts for up to 30% of available size
