Friday, 27th March – h. 14:00
Seminars Room, NICO
Cortical connectivity: axonal tracing, diffusion MRI and dynamics
One of the strongest, time-honored structural-functional relations in the neurosciences is that between axon diameter and conduction velocity of action potentials established by Hursch (1939) in a foundational study, supervised by Gasser, Grundfest and Lorente de No, at Rockefeller University. This relation was an essential building block in Erlanger and Gasser’s structural/functional classification of peripheral nerve fibers leading to the attribution of Nobel Prize to Gasser in 1945.
Over the last few years the analysis of axon diameters and conduction velocities was extended to the central nervous system using a combination of histological techniques coupled to the computation of axonal conduction velocities and axonally generated conduction delays. The overall picture is that the brain consists of axonal pathways conducting at different velocities and generating different conduction delays between brain sites.
Diffusion MRI is overcoming severe obstacles to provide a reliable picture of brain connections, including estimates of axon diameters. A bewildering dynamic view of brain function is emerging where axons become the agent of fundamental computations particulalrly in the temporal domain. These studies of axons have prompted some functional interpretations although other aspects, raise open questions.
Host: Alessandro Vercelli
Events & Meetings
Our young researchers present their work to collegues. From January to December, every two weeks, on friday at 2:00 pm
Seminars Room, NICO
The main goal of the BraYn initiative is to organize a scientific conference involving different laboratories across Italy and Europe where young researchers, especially PhD students and junior postdocs, can share their knowledge, skills and ideas to establish new collaborations between different research groups.