III. Vertebral Column/Spinal Column: Spinal Cord. (Pg. 23) Flashcards
In horizontal view, what direction fo he spinal cord tends to be largest?
transverse
What are the spinal cord enlargement locations and the name given to each?
C3-T1, the cervical enlagrgement; T9-12, the lumbar (lumbosacral) enlargement
Where is the greatest transverse diameter of the spinal cord
C6
In which plane (or direction) will the diameter off the spinal decrease from C2 down to T1?
Midsagittal or anterior-posterior plane
What spinal nerves originate from the lumbar (lumbosacral enlargement?
L1-S3 spinal nerves
What is the generic cord level of origin - vertebral level combination for the lumbar (lumbosacral) enlargement?
L1, L2 cord levels in T9 verebra; 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?
typically S4, S5 and Co1
In which vertebral foramen will the conus medullaris typically be ovserved?
L1
What is the name given to the nerve roots below L1?
cauda equina
What is the continuation of pia matter below the conus medullaris called?
filum terminale internum
What I s the location and name given to the area where all meninges first converge at the caudal part of the vertebral column?
typically S2, the dural cul de sac
Neural tissue has been identified in what part of he filum terminale?
proximal part of the filum terminale internum
What is the fate of the neural tissue identified along the filum terminale internum?
it joins peripheral nerve roots of the spinal nerves as high as L3 and as low as S4
What does the neural tissue associated with the filum terminale internum appear to innervates?
lower limbs and the external anal sphincter
