(A) Pseudocolor time-lapse two-photon images showing a spontaneous
calcium wave of MGCs in a 3-dpf Tg(GFAP:GCaMP2) larva. The two red dashed
circles indicate the boundaries of the IPL, and the red arrow indicates the
initiation site of the wave.
(B) Enlarged region of the red box in (A), showing the vertical
propagation from MGC processes in the IPL to their endfeet and somata. IPL,
inner plexiform layer; OLM, outer limiting membrane.
(C) Calcium activities of four regions of interest in (A, colored
circles). The shadowed area marks the period of images shown in (A).
(D) Superposition of the initiation site of 45 MGC calcium waves from 6
larvae.
(E) Temporal distribution of the occurrence of spontaneous MGC calcium
waves. Calcium imaging data were obtained from 11 larvae.