No need for post-mortem. There is now a range of (many noninvasive) imaging technologies that provide an unprecedented level of visualization of brain structure and function - from individual molecules to the whole brain.
Depending on what you want to look at:
* There's
Single Photon Emission Computed Tomography (SPECT) or
Positron Emission Tomography (PET), and
Magnetic Resonance Imaging (MRI) scanning to look at brain physiology, neurotransmitters, and how it functions.
* There's
Electrical and Doppler Ultrasonic Imaging and
CT scanning that shows us the anatomy of the brain and how it is structured.
* We can also measure the biochemical actions and interactions of the brain cells and the molecules that compose them using
Functional MRI and various
Optical Imaging Microscopes*
Electroencephalography (EEG) and
Magnetoencephalography (MEG) measure the electrical brain cell activities.
* There are also several other major MRI techniques that have highly specialized functions
The challenge is being able to get this research funded and authorized with the current laws around DMT (and Psilocybin which has been show to grow new brain cells in mice)
Throughout recorded time and long before, trees have stood as sentinels, wise yet silent, patiently accumulating their rings while the storms of history have raged around them --The living wisdom of trees, Fred Hageneder