Figure 2 (IMAGE) Tohoku University Caption A represents a 3D electron microscopy analysis of glial phagocytosis. In the brain, presynaptic bouton (blue) sends information to the postsynaptic spine (yellow). Such synaptic contact is surrounded by the glia (magenta). With learning and memory, part of the spine is eaten by the glia (phagocytosis). B shows a 3D reconstruction of the postsynaptic spine. The protrusion (orange) is the part being eaten by the surrounding glia. The reduction in the spine volume leads to efficient motor control. Credit Morizawa & Matsui Usage Restrictions REPORTERS MAY USE FREELY THESE MATERIALS IN NEWS COVERAGE WITH APPROPRIATE CREDIT INFORMATION. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.