Schematische Darstellung einer sensorischen Nervenzelle. Beim Einwachsen des Axons des sensorischen Neurons in die Graue Substanz des Rückenmarks sind zwei Typen der Verzweigung zu beobachten: An der Dorsalwurzeleingangszone teilt sich der Axonschaft in zwei Äste (1), die auf der Oberfläche des Rückenmarks in entgegengesetzter Richtung weiterwachsen. Aus diesen Ästen sprossen danach an mehreren Stellen Kollaterale (2) und ermöglichen so die Übertragung eines Reizes auf mehrere Zielzellen.
(Zeichnung: Hannes Schmidt / Copyright: MDC)
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