What is the length of the spinal cord in relation to the spinal segments and in cm?
Foramen magnum to L2
42 to 45 cm
During what period of development does the spinal cord fill the entire length of the spinal cord?
What segmental level does the spinal cord end at birth?
L1 or L2 (occasionally L3)
Where at what levels is the cervical enlargement located and where is it the largest?
C3-T2 (spinal nerves)
Where is the lumbar enlargement located?
L1-S3 (spinal nerves)
What is the end of the spinal cord called?
Where is endosteal dura located?
"attached" to the the inner cranium extending down to C3
What type of dura lies deep to the endostial dura?
What two types of meninges are morphologically related and what are they called?
Arachnoid and Pia
Describe the filum terminale?
Extension of the Pia matter to the end of the dural sac. It then passes through the dural sac where the arachnoid and dura wrap around it. It then passes into the coccyx and becomes the coccygeal ligament. It then attaches to the tip of the coccyx
what are the denticulate ligaments made of and what do they connect?
Made of collagen
connect pia and subarachnoid matter
Where does the lumbar cistern end?
What artery are the posterior and anterior spinal arteries derived from?
What reinforces the anterior Spinal Artery?
What reinforces the anterior on posterior arteries?
What reinforces the anterior spinal artery in the lumbar enlargement area of the spinal cord?
Major segmental medullary artery
What do the anterior and posterior external vertebral venous plexus communicate with?
What does the posterior external vertebral venous plexus communicate with that the anterior does not?
occipital veins, vertebral beins, and deep cervical veins