Exam 1-Spinal Cord Flashcards
In horizontal veiw, what direction of the spinal cord tends to be largest?
transverse
What are the spinal cord enlargement locations and the name given to each?
C3-T1, the cervical enlargement; T9-T12 the lumbar (lumbosacral) enlargement
Where is the greatest transverse diameter of the spinal cord?
C6
In which plane (or direction) will the diameter of the spinal decrease from C2-T11?
midsagittal or anterior-posterior plane
What is a generic cord level of origin - vertebral level combination for the lumbar (lumbosacral) enlargement?
L1, L2 cord levels in T9 vertebra; L3,L4 cord levels in T10 vertebra; L5, S1 cord levels in T11 vertebra; S2, S3 cord levels in T12 vertebra
What is the caudal end of the spinal cord called?
conus medullaris
What spinal nerves originate from the conus medullaris?
typicaly S4, S5,and Co1
In which vertebral foramen will the conus medullaris typically be observed?
L1
What is the name given to the nerve roots below L1?
cauda equina
What is the continuation of pia mater below the conus medularis called?
filum terminale internum
What is the location and name given to the area where all meningesfirst converge at the caudal part of the vertebral column?
typically S2, the duralcul de sac
Neural tissue has been identified in what part of the filum terminale?
proximal part of the filum terminale internum
What is the fate of the neural tisssue identified along the filum ternminal internum?
it joins the peripheral nerve roots of spinal nerves as high as L3 and as low as S4
What does the nerual tissue associated with the filum terminale externum appear to innervate?
lower limbs and the external anal sphincter
The last arterial vasa corona creates what feature on angiogram?
cruciate anastomosis
