CONNECTION (LEFT)

David Luck, Yang Ding, Gregory Lodygensky

Diffusion Magnetic Resonance Imaging

This image represents the corpus callosum in a newborn baby. The most important of the brain's commissures - fibre tracts connecting different regions - it enables connectivity between the two hemispheres. The corpus callosum is formed very early in fetal development and can be the subject of several pathological processes (e.g. fetal alcohol syndrome). It is therefore of great interest to neonatologists since its integrity will influence the child's future, in terms of motor, language, cognition, etc. Modelling the corpus callosum is a fundamental step that the Canadian Neonatal Brain Platform (cnbp.ca) has taken to improve diagnosis and prognosis in neonatal radiology.

TRACTOGRAPHY OF THE CEREBELLUM (RIGHT)

Paul-Noel Rousseau, Christopher Steele

Diffusion Magnetic Resonance Imaging

This image shows the connections between two brain regions, the cerebellum and pons, in a single subject. The cerebellum is located at the back of the head, just above where the spinal cord connects to the brain. It is composed of different lobules, which were segmented using probabilistic tractography between each of the lobules and the pons. The resultant tracts are colour coded and appear lighter in areas with a large number of intersecting streamlines, or connections. The lobules show different patterns of connectivity with the pons, with some projecting to more rostral areas in the pons (towards the front) and some projecting more caudally (towards the tail). This is thought to reflect topographic organization of white matter connections between the pons and cerebellum.

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March 7th, 2023

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