Читать книгу Essentials of Veterinary Ophthalmology - Kirk N. Gelatt - Страница 129

For most RGC axons, the first synapse occurs in the LGN, which is one of about 10 targets of RGCs in the thalamus. The axons maintain their retinotopic arrangement through the optic nerves, chiasm, and tracts and as they enter the LGN. Here, the RGC axons synapse with dendrites of LGN interneurons (which provide for signal processing) and projecting cells in synaptic glomeruli. In the LGN, RGC axons segregate by eye and functional group, usually forming layers where they terminate in discrete clusters, generating a retinotopic map of the contralateral visual hemifield (with receptive fields similar in size and response properties to the retinal receptive fields).