I know there were cadaveric studies for certain surgical approaches (endonasal, posterior fossa, etc) in China. But these programs only held for several days in a year.

Would you be so kind to provide some links for that courses?

I know one program in Turkey by Profs. Prof. Uğur Türe and Aaron Cohen-Gadol. This lab-based program includes cadaveriс dissection.

Here you can find additional information - https://www.neurosurgicalatlas.com/research-fellowship

Here is an introduction for the course, however it's in Chinese, https://mp.weixin.qq.com/s?__biz=MzU3ODQ5MzQ3MA==&mid=2247483794&idx=1&sn=efc9ca1ccc8441c25264158513fb13bb&chksm=fd75cce3ca0245f53c18eaeab2fbb42f74a1f571b0d6a1269bf2362f06f84d567247410a11f6&scene=27

The course lasted for 3 days, and it takes 3000-4000 rmb for registration. I can help contact with the department (in Shenzhen, China) if you are interested.

Anton Konovalov: Starting in the 1970ies, I sought to advance the acquaintance with insufficiencies in (also the collateralization of) the venous drainage of the brain.

Next, to deepen the knowledge of the fibrous suspension apparatus of the spinal cord and brainstem - first of its outer, then of its inner constituent elements.

Are there any colleagues or institutions working in these fields?

Try this:https://medicine.uams.edu/neurosurgery/education/

https://skullbaseneurosurgery.org

They offer a variety of solutions, from courses to 6 months to 1 year fellowships.

I have been a former fellow and I strongly recommend it. There is a long waiting list, but you can enquire how long will it be.

Best wishes

G