Ultrastructure of synapses apposed to alpha motoneurons. Normal input coverings of the surface of an alpha motoneuron (A-B). Synaptic covering with partially detached terminals intermingled with astrocytes in VRA alone (C and D), VRA-EAE-peak (E and F) and VRA-EAE-rem groups (G and H). In A, C, E and G, one of the terminals is highlighted in yellow and the motoneuron cytoplasm is colorized in cyan. Scale bar = 1 μm.