[The Schmidt-Lantermann incisures of the myelin sheath of Mauthner axons: site of longitudinal myelin growth].

The myelin sheath of the Mauthner axons in the spinal cord of young and adult fish belonging to the family Cyprinidae was examined by phase and electron microscopy. The sheath thickened considerably with age, the number of lamellae increasing from 200-230 in young fish (length 2--4 cm) to 250-300 in adult animals (length 20-25 cm). During this growth, the… CONTINUE READING