The Connectome is the name given to the map of neural connections within an organism's nervous system. Analogous to the 'wiring diagram' of a machine. See: Wikipedia
When organisms are growing - in the sense of 'wiring up' their nervous system, then it's assumed that genetic mechanisms must somehow be directing the process. Guiding which neurones connect to which others.
The details of this guiding process are unknown.
So far, only one organism (the roundworm Caenorhabditis elegans) has had its connectome fully mapped, However :
“[…] the genetic mechanisms that determine which neurons can synapse with each other remain largely unknown even in this simple and well-studied organism “
Source :Uncovering the genetic blueprint of the C. elegans nervous system in PNAS, December 29, 2020 117 (52) 33570-33577
Ideas for new topics, and suggested additions / corrections for old ones, are always welcome.
If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !
Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.
( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)