arciform density ) erscheint.
In Stäbchen der Netzhaut (Retina) sind SK meist bogenförmig, in Zapfen eher bandförmig.
In der englichen Fachliteratur werden diese SK als synaptic ribbons bezeichnet.
www.uni-mainz.deThey are presynaptically anchored to an electron-dense material that appears in sections of rod synapses as an arciform density.
Rod SBs mostly are bent plates, in cones band-like structures predominate.
Therefore the term synaptic ribbons has been established in literature.
www.uni-mainz.deNeben vereinzelten SK kommen auch Felder mit über 20 dieser Strukturen vor ( erste Animation ).
In der Netzhaut (Retina) von Tieren sind unter Dunkelbedingungen die meisten SK C- bis hufeisenförmig, beim Menschen (Animationen 5-8) eher bandförmig, und gebunden an ein präsynaptisch verankertes elektronendichtes Material, welches in Photorezeptorsynapsen im Schnitt als bogenförmige Verdichtung (englisch:
arciform density) erscheint.
www.uni-mainz.deApart from single SBs, fields of over 20 somewhat parallel ordered structures occur.
Under constant light strange shield-like (animation 2), spherical or irregular lump-like structures (animation 3) are seen.In the dark-adapted retina of many animals most SBs are C- to horesshoe-like structures whereas in humans they mostly appear as ribbons.
They are presynaptically anchored to an electron-dense material that appears in sections of rod synapses as an arciform density.
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