synaptic ribbon

synaptic ribbon
1. in the eye, a dense lamella surrounded by a halo of synaptic vesicles, found at a right angle to the apex of the synaptic ridge in the outer plexiform layer of the retina. 2. in the internal ear, a structure similar to that found in the eye, occurring in varying numbers in the cytoplasm of the hair cells.

Medical dictionary. 2011.

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  • Ribbon synapse — Latin synapsis fasciolaris Code TH H2.00.06.2.00024 Ribbon synapse is a type of synapse linking some particular neuronal cells, which have unique features, such as their morphology, mechanisms of multivesicular release and calcium channel positio …   Wikipedia

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  • ribbon synapse — Ultrastructurally distinct type of synapse found in a variety of sensory receptor cells such as retinal photoreceptor cells, cochlear hair cells and vestibular organ receptors, as well as in a non sensory neuron, the retinal bipolar cell. Unlike… …   Dictionary of molecular biology

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  • Pinealocyte — Pinealocytes are the main cells of the pineal gland. They produce and secrete melatonin. Pinealocytes have an organelle called the synaptic ribbon; this is considered to be a specific marker for pinealocytes. Some of the enzymes of the… …   Wikipedia

  • arciform density — a trough shaped body separating the synaptic ribbon and the membrane of the cone pedicle or of the rod spherule in the retina …   Medical dictionary

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