C. Chromaffin cells of the adrenal medulla. E. Sympathetic neuroblasts. If the neural tube fails to form embryonically in a portion of the 12th somite, the resulting abnormality would be known as. A. Spinal bifida occulta. B. Spinal dysraphism.
External hydrocephalus is most often due to.
A. Blockage of the cerebral aqueduct. B. Blockage of the foramen of Luschka and Magendie. C. Dilated cisterns with CSF rupture into subdural space due to venous drainage blockade. D. Increased cerebrospinal fluid production. E. Blockage to the cisterna magna only.