Why do glial endfeet show Ca2+ responses at capillaries but not arterioles during sensory stimulation?

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Description

The study reveals differential glial Ca2+ signaling between vessel types but doesn’t explain the underlying basis for this selectivity. This anatomical and functional distinction could reveal new principles of neurovascular organization relevant to disease states.

Gap type: unexplained_observation Source paper: Glial Cell Calcium Signaling Mediates Capillary Regulation of Blood Flow in the Retina. (None, None, PMID:27605617)

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