Flashcards in Vertebral Column/Spinal Column (Spinal Cord, Spinal Canal & Spinal Cord Relationships) Deck (21)
In horizontal view, what direction of the spinal cord tends to be largest?
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?
In which plane (or direction) will the diameter of the spinal decrease from C2-T1?
Midsagittal or anterior-posterior plane
What spinal nerves originate from the lumbar (lumbosacral) enlargement?
L1-S3 spinal nerves
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?
What spinal nerves originate from the conus medullaris?
Typically S4, S5, and Co1
In which vertebral foramen will the conus medullaris typically be observed?
What is the name given to the nerve roots below L1?
What is the continuation of pia mater below the conus medullaris called?
Filum terminale internum
What is 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 the 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 spinal nerves as high as L3 and as low as S4
What does the neural 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?
What is the name given to the condensation of meninges below S2?
Filum terminale externum
What is the name given to the caudal attachment of the meninges?
Coccygeal medullary vestige
What is the name given to the condition in which the conus medullaris is located below L1 and the filum terminale is thickened?
Tethered cord syndrome
What is the relationship between scoliosis and tethered cord syndrome?
It is suggested that the column will change normal curvatures to mitigate damage to the spinal cord