Dr Loeb said: “Our findings don’t mean that we should throw away human tissue research programmes, it just means that researchers need to take into account these genetic and cellular changes, and reduce the post-mortem interval as much as possible to reduce the magnitude of these changes.
“The good news from our findings is that we now know which genes and cell types are stable, which degrade, and which increase over time so that results from postmortem brain studies can be better understood.”
A zombie apocalypse may not be entirely out of the question, however.
A study at the University of California has examined the power of the toxoplasmosa gondii.
The parasite is known to affect the brains of rodents, manipulating their behaviours to extreme levels.
For instance, the parasite can stop rats from running away from cats in the hopes of jumping to a new host.
Scientists were, consequently, interested in learning whether something similar could happen to humans.