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Neuroanatomy on a Monday morning is rather like a shot of tequila on an empty stomach. It seems like a good idea at the time. "What's one shot of tequila?"/"What's a little neuroanatomy?" Lol.
Fortunately, tequila goes quite well with salty & greasy food - and SO DOES NEUROANATOMY. It is amazing how much better something gets when combined with chips and aioli!
Anyway I got through the spinal cord today. The embryology is quite easy. Step 1: a patch of ectoderm forms the neural groove. Step 2: A group of cells migrates to form the neural crest cells. Step 3: The neural groove is "zippered" up to form the neural tube, starting in the middle and moving rostrally and caudally. Step 4: The neural tube cells form the alar plate (sensory neurons ... i.e. the dorsal columns & dorsal horns) and the basal plate (motor neurons ... i.e the ventral horns and the corticospinal tracts).
My mnemonic for layers a needle would pass through during an LP is SLEDS Along Snow:
S - skin & superficial fascia
L - ligaments
E - epidural space
D - dura
S - subdural space
Along - arachnoid
Snow - subarachnoid space (from which the CSF is extracted)
--KM <3