Inner Nets

摘要

In 1898, Camillo Golgi, an eminent Italian physician and pathologist, published a landmark paper on the structure of "nervous cells."In addition to the organelle that still bears his name, the Golgi apparatus, he described "a delicate cov-ering" surrounding neurons，cell bodies and extending along their dendrites. That same year, another Italian researcher, Arturo Donaggio, observed that these coverings, now known as perineuro-nal nets (PNNs), had openings in them, through which, he correctly surmised, axon terminals from neighboring neurons make synapses.