Intervertebral Foramen Flashcards
(20 cards)
Average height of intervertebral foramina
12.9 mm
What is the sum of the heights of the true intervertebral foramina from C2/C3 to L5/S1 (percent)
40%
When entire column is considered, height of all intervertebral foramina equals: (percent)
53%
Segmental arteries (review)
C1-C6: ascending cervical artery C1-C6: vertebral artery C7, T1: deep cervical artery T1, T2: highest/superior intercostal artery T3-T11: posterior intercostal artery T12: subcostal artery L1-L4: lumbar artery L5: iliolumbar artery L5-Co1: lateral sacral artery L5-Co1: Median/middle sacral artery
What are the characteristics of the Artery of Adamkiewicz (Arteria Radicalis Magna Anterior)
It is a left side, anterior medullary feeder artery, located in the T9/T10 intervertebral foramen, and the primary vascular supply to the lumbar enlargement
What is the relationship between aging and cervical spine nerve root characteristics?
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
What are the specific attachment sites for cervical spinal nerve?
The sulcus for the vertebral primary ramus (C4-C7) on the costotransverse bar and the vertebral artery. Additional attachment occurs b/w the adventitia of the vertebral artery and the epineurium
What contributes to the anterior boundary of the thoracic intervertebral foramen?
The costocentral joint
Where do cervical spinal nerves tend to exit?
exit in the middle and toward the front of the IVF
The outline of the lumbar foramen is described as?
reniform or earlobe-shaped
What are the largest spinal nerves in the human body?
L5 and S1
What increases the length of the intervertebral foramen at L5?
the lumbosacral tunnel
What condition is the result of encroachment on the L5 spinal nerve?
the far out syndrome (tvp of L5, sacral ala, and lumbosacral ligament form boundaries of the tunnel)
in 47% of the population transforaminal ligaments partition the intervertebral foramen into two variously sized compartments
in case you were wondering
Lower spinal nerves can be frequently compressed by?
the IVD above their exiting foramen
What represents the zygapophysis and capsular ligament in the the sacrococcygeal IVF?
sacral cornu, coccygeal cornu, and intercornual ligament
What is unique about the relationship of spinal nerve to IVF at S5-Co1
There are two nerves present, S5 nerve and Co1 nerve
What are some examples of destructive lesions of the vertebral body?
tuberculosis, hemangiomas, osteoporosis
What are examples of acquired alterations of the spinal curves identified in class?
obesity, pregnancy and the use of heavy backpacks
What is recommended weight of a backpack compared to individual weight for the developing spine?
Backpack weight should not exceed 10% individual body weight (can increase lordotic lumbar curve
