Spinal Cord and Meninges Flashcards
Where does the spinal cord begin/end in adults?
Begins at the medulla oblongata and ends around L1/L2 vertebral level
How many pairs of spinal nerves exit from the spinal cord?
31
How long is the spinal cord in fetus’?
Almost equal length as the vertebral canal
What is the remaining spinal nerves that form a bundle called?
(represents a horse tail)
Cauda equina (horse tail)
What is the conical inferior end of the spinal cord?
Conus medullarise
What is the continuation of pia mater (internum) called?
Filum terminale
What term describes the dilated dural sac, which ends at the S2 vertebral level?
Dural cistern
What do the ventral rami of the spinal form?
Nerve plexuses that supply the limbs
What are the 2 plexus that are formed call?
Brachial plexus — upper limb
Lumbosacral plexus — lower limb
Where is CSF found?
Between the arachnoid and pia mater
Where is thoracolumbar outflow of the sympathetic nerve system found?
T1-L2 segment
Where are cell bodies located?
Lateral horn of the grey matter
Where does craniosacral outflow of parasympathetic nervous system happen?
- cranial outflow from the brain
- sacral outflow: pelvic splanchnic nerve (S2-S4)
What is ischemia?
Lack of oxygen (or none) to an area due to lack of (or no) blood flow to that same area
Where is a lumbar puncture commonly performed?
L3-L4 or L4-L5, in the subarachnoid space
