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3D Exploration of the Brainstem in 50-micron Resolution MRI

Makris, N.; Rushmore, R. J.; Wilson-Braun, P.; Papadimitriou, G.; Ng, I.; Rathi, Y.; Zhang, F.; O'Donnell, L.; Kubicki, M.; Yeterian, E.; Lemaire, J.-J.; Calabrese, E.; Johnson, G. A.; Kikinis, R.

2019-09-14 neuroscience
10.1101/768002 bioRxiv
Show abstract

The brainstem, a structure of vital importance in the mammals, is currently becoming a principal focus in cognitive, affective and clinical neuroscience. Midbrain, pontine and medullar structures are the epicenter of conduit, cranial nerve and such integrative functions as consciousness, emotional processing, pain and motivation. In this study, we parcellated the nuclear masses and the principal fiber pathways that were visible in a high resolution T2-weighted MRI dataset of 50-micron isotropic voxels of a postmortem human brainstem. Based on this analysis, we generated a detailed map of the human brainstem. To assess the validity of our maps, we compared our observations with histological maps of traditional human brainstem atlases. Moreover, we reconstructed the motor, sensory and integrative neural systems of the brainstem and rendered them in 3D representations. We anticipate the utilization of these maps by the neuroimaging community at large for applications in basic neuroscience as well as in neurology, psychiatry and neurosurgery, due to their versatile computational nature in 2D and 3D representations in a publicly available capacity.

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