Acquired Chronic Internal Hydrocephaly

Patient was 60 years old. At one point possessed considerable intellect as well as musical ability and ability to work. Later in life became blind, partially deaf, with some spasticity of lower limbs. Never had convulsive attacks, fair health aside form brain disease.

Brain 1,240 g when emptied, contained 2,400 cubic centimeters of fluid.

You can see here the extreme results of the blockage of the cerebral aqueduct connected to the fourth ventricle.

This man’s hydrocephaly developed later in life, when his skull was fully formed, so outwardly he did not show deformity (aside from a slight bulging of the eyes). However, the pressure of the cerebrospinal fluid (CSF) caused his optic chiasma to become flattened, shrunken, and greyish in color.

Interestingly, though this man lost many of his basic functions due to the increasing severity of his hydrocephalus over the last part of his life (as more and more CSF became stuck in his fourth ventricle), he actually retained a fair amount of intelligence and ability to reason and speak. This is because his frontal and prefrontal cortex (his frontal lobe) were almost completely spared the effects shown in the central and posterior cerebrum (parietal, temporal, limbic, and occipital lobes).

If you look at the position of the fourth ventricle in the brain (just above the cerebellum, behind the brainstem, lower than the other ventricles), you can see why the occipital lobe, which processes sight, would be affected before the other regions of the brain, and why this patient experienced those specific symptoms, yet still retained his intelligence.

Illustrations of the Gross Morbid Anatomy of the Brain in the Insane. I.W. Blackburn, 1908.

ETA: The hydrocephalus is labeled “congenital”, because the pathologist supposed that the blockage of the cerebral aqueduct was due to a benign tumor, present from birth, that had simply grown large enough to cause problems.

740 notes


  1. akzidens reblogged this from neuromorphogenesis
  2. red-headed-nightmare reblogged this from timemakesnomistakes
  3. meme-still-me reblogged this from frightfulhale
  4. frightfulhale reblogged this from alphabrows
  5. alphabrows reblogged this from timemakesnomistakes
  6. miss-katonic reblogged this from timemakesnomistakes
  7. timemakesnomistakes reblogged this from endolith
  8. bleedingcactus reblogged this from profanedrseuss
  9. profanedrseuss reblogged this from afteryourdeathormine
  10. ravenstagrising reblogged this from afteryourdeathormine
  11. afteryourdeathormine reblogged this from neuromorphogenesis
  12. em-pa-na-das reblogged this from neuromorphogenesis
  13. midgetmonkey reblogged this from biomedicalephemera
  14. when-i-see-an-elephant-fly reblogged this from biomedicalephemera
  15. serotonin-syndrom reblogged this from neuromorphogenesis
  16. missfadingobsession reblogged this from biomedicalephemera
  17. intelligenceoftheunexplained reblogged this from dieselotherapy and added:
  18. ashake-n-bake reblogged this from dieselotherapy
  19. thunderandballoons reblogged this from medicalexamination
  20. werenotinkansastoto reblogged this from k-911 and added:
    How…how did this person even function? With the ventricles taking up that much of thr cranial cavity there must’ve been...
  21. k-911 reblogged this from dieselotherapy
  22. dieselotherapy reblogged this from medicalexamination
  23. nurseaeryn reblogged this from nightnursenotes
  24. nightnursenotes reblogged this from medicalexamination
  25. hotdogcephalopod reblogged this from medicalexamination