Term
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Definition
| Branch that feeds into the periosteum of the vertebrae |
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Term
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Definition
| Branch that goes through the periosteum of the vertebral body straight into the vertebral body itself |
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Term
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Definition
| Branches that enter the IV foramina and divide into anterior and posterior vertebral canal branches that pass to the vertebral body and vertebral arch, respectively |
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Term
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Definition
| Branch of the spinal branches in the vertebral foramen that goes into the vertebral body and vascularizes it |
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Term
| Posterior vertebral canal |
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Definition
| Branch off the spinal branches that feeds runs in the vertebral foramen on the posterior (spinous process) side, and vascularizes the vertebral arch |
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Term
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Definition
| Branches off the spinal branches (those in the vertebral foramen) between the anterior and posterior vertebral canals that vascularize the anterior and posterior roots of the spinal nerves |
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Term
| Segmental medullary arteries |
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Definition
| Branches off the spinal branches (those in the vertebral foramen) between the anterior and posterior vertebral canals that vascularize the spinal cord |
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Term
| Internal vertebral epidural venous plexus |
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Definition
| Spinal veins that run inside the vertebral canal, forming veinous plexuses - valveless, so are sometimes the site of the spread of disease |
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Term
| External vertebral venous plexus |
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Definition
| Spinal veins that run outside the vertebral canal, along the spinous processes and such |
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Term
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Definition
| Veins that run inside the vertebral bodies and connect to both the anterior external vertebral veinous plexus and the anterior interior vertebral veinous plexuses |
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Term
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Definition
| Receive veins from the spinal cord and vertebral veinous plexuses, run along the length of the spinal column through the IV foramina, drain into the vertebral veins of the neck and the segmental veins of the trunk |
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Term
| (Recurrent) Meningeal branches of the spinal nerves |
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Definition
| Branch off the spinal nerve before it splits into ventral and dorsal rami, and mostly goes back into vertebral foramen (to supply the periosteum, ligamenta flava, anuli fibrosi (posteriorly), posterior longitudinal ligament, spinal dura mater, and blood vessels of the vertebral canal. The ones that remain exterior innervate the anuli fibrosi and anterior longitudinal ligament |
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Term
| Where does the spinal cord attach to the brain? |
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Definition
| Through the foramen magnum of the skull, at the medulla oblongata of the brain |
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Term
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Definition
| The tapering end of the spinal cord, which terminates around L1 or L2 (so the spinal cord only runs the upper 2/3 of the spinal column) |
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Term
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Definition
| The bundle of spinal nerve roots running through the subarachnoid space (that looks like a horse's tail) |
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Term
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Definition
| Extends from C4 to T1, and most of the anterior rami arising from it form the brachial plexus (which innervates the upper limbs) |
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Term
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Definition
| From L1 through S3 segments, and the anterior rami arising from it contribute to the lumbar and sacral plexuses of nerves which innervate the lower limbs |
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Term
| Posterior v. Anterior Roots of Spinal Cord |
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Definition
| Formed from many rootlets in a single spinal cord segment, the posterior roots are sensory (afferent) and the anterior roots are motor (efferent) |
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Term
| Posterior Rami v. Anterior Rami |
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Definition
| Supply the skin and the deep muscles of the back; Supply the limbs and the rest of the trunk |
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Term
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Definition
| Attaches to the dura mater on the inferior end (or rather is a continuation of the pia mater), and runs all the way down the cauda equina to the posterior part of the coccyx, anchoring the lower part of the spinal cord |
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Term
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Definition
| An extension of the dura mater at the point where the spinal nerve leaves the spinal column. The Dura simply extends out into the dural root sheath, which then melts smoothly into the epineurium. |
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Term
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Definition
| The potential space between the dura and the arachnoid meninges, sometimes referred to as the "subdural space" |
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Term
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Definition
| Strands of connective tissue radially connecting the pia mater to the arachnoid through the CSF |
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Term
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Definition
| A fibrous sheet of pia mater extending midway between the posterior and the anterior nerve roots, connecting them to the inside of the arachnoid (and suspending the spinal cord in the dural sac) |
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Term
| Anterior and Posterior Spinal Arteries |
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Definition
| 1 anterior, 2 posterior - each branch from either vertebral artery or posterior inferior cerebellar arteries By themselves, supply only the most superior part of the spinal cord; rest is supplied by anterior and posterior segmental medullary arteries (these reinforce the blood supply of the spinal arteries) |
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Term
| Anterior and posterior segmental medullary arteries |
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Definition
| Resupply blood to the spinal arteries, particularly at the cervical and lumbosacral enlargements |
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Term
| The Great anterior segmental medullary artery (of Adamkiewicz) |
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Definition
| Reinforces circulation to 2/3 of spinal cord, and is def. the biggest segmental medullary artery |
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Term
| Posterior and anterior radicular arteries |
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Definition
| Supply blood to posterior and anterior spinal nerves and their coverings |
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Term
| Anterior/Posterior Spinal Veins |
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Definition
| Arranged longitudinally, inside the vertebral foramen (the epidural space), valveless, 3 of each |
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