Journal
NEURON
Volume 96, Issue 4, Pages 936-+Publisher
CELL PRESS
DOI: 10.1016/j.neuron.2017.10.012
Keywords
-
Categories
Funding
- United States National Institute of Mental Health [MH108503, MH111438]
- United States National Institute of Neurological Disease and Stroke [NS082097, NS097265]
- United States National Institute of Biomedical Imaging and Bioengineering [EB003832]
- United States National Institute of General Medical Sciences [GM12345]
- United States National Science Foundation [PHY-153264, OIA-1539034]
Ask authors/readers for more resources
Resting-state signals in blood-oxygenation-level-dependent (BOLD) imaging are used to parcellate brain regions and define functional connections'' between regions. Yet a physiological link between fluctuations in blood oxygenation with those in neuronal signaling pathways is missing. We present evidence from studies on mouse cortex that modulation of vasomotion, i.e., intrinsic ultra-slow (0.1 Hz) fluctuations in arteriole diameter, provides this link. First, ultra-slow fluctuations in neuronal signaling, which occur as an envelope over g-band activity, entrains vasomotion. Second, optogenetic manipulations confirm that entrainment is unidirectional. Third, co-fluctuations in the diameter of pairs of arterioles within the same hemisphere diminish to chance for separations > 1.4 mm. Yet the diameters of arterioles in distant (> 5 mm), mirrored transhemispheric sites strongly co-fluctuate; these correlations are diminished in acallosal mice. Fourth, fluctuations in arteriole diameter coherently drive fluctuations in blood oxygenation. Thus, entrainment of vasomotion links neuronal pathways to functional connections.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available