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The migration of neuronal precursors along radial glial fibers is a critical step in the formation of the nervous system. In this report, we show that neuregulin–erbB receptor signaling plays a crucial role in the migration of cerebellar granule cells along radial glial fibers. Granule cells express neuregulin (NRG), and radial glia cells express erbB4 in the developing cerebellum and in vitro. When...
Active and passive electrical signals transmit across the earthworm (Lumbricus terrestris) medial giant axon (MGA) segment after reconnection induced by laser and electric field pulses. Laser pulses of 308 nm, 15 ns pulse duration, and pulse energy 5-50 μJ in the objective plane induced axon reconnection in 12 of 133 (9%) preparations. Electric field pulses of 200-800 V, 100 μs duration, induced...
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