ABSTRACT
Neuraxis 1. CNS = Brain and brainstem + spinal cord 2. PNS = Peripheral nerve + responding muscle 3. ANS = Sympathetic nervous system (NS) (“ght or ight” response) + Parasym-
pathetic NS (Salivation, Lacrimation, Urination, Defecation, Emesis = “SLUDE” or Diarrhea, Urination, Miosis, Bronchorrhea, Bronchospasm, Emesis, Lacrimation, Salivation = “DUMBBELS”)
CNs. Protected by blood-brain barrier (BBB). 2. LMN = Anterior horn to peripheral nerve + neuromuscular junction to mus-
cle, includes the spinal dorsal root ganglia and the ANS ganglia. Not protected by BBB.
