Bernard Droz

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The "axonal flow" theory holds that the nerve cell body is continuously forming new cytoplasm which enters the axon and travels along its length. This theory was formulated by Weiss and collaborators (Weiss and Hiscoe, '48) to account for the accumulation of material in front of a nerve constriction and for the high concentration of enzymes appearing in the(More)
The spatial arrangement of the smooth endoplasmic reticulum (SER) was studied in 0.5-2 mum thick sections of rat spinal and chick ciliary ganglia previously impregnated with heavy metal salts. Electron microscopy at low (10-5 V) or high (10-6 V) voltage showed the impregnated SER as a continuous system extending probably from the perikaryon to the axon(More)
Calbindin and calretinin are two homologous calcium-binding proteins that are expressed by subpopulations of primary sensory neurons. In the present work, we have studied the distribution of the neurons expressing calbindin and calretinin in dorsal root ganglia of the rat and their peripheral projections. Calbindin and calretinin immunoreactivities were(More)
The neuronal population of dorsal root ganglia in mouse consists of various classes of ganglion cells which may be divided in turn into subclasses by using several criteria. In class A cells, membrane-bound organelles are distributed ubiquitously throughout the large perikarya. Subclass A alpha (12%), which is characterized by large clumps of Nissl(More)
Biochemical and immunocytochemical investigations have shown that myelin-associated glycoprotein (MAG) is exclusively related to myelin and myelin-forming cells in mammals. In the present study it was found that dorsal root ganglia in young chickens display MAG-immunoreactive material in most small sensory neurons. The presence of MAG at the surface of(More)
The expression of calbindin (28,000 mol. wt Vitamin D-dependent calcium binding protein) was studied in sensory neurons of the chick dorsal root ganglion by combining immunocytochemical and ultrastructural features. In the chick embryo at E10, about 20% of the neuroblasts were immunostained with antibodies raised to calbindin. After hatching, two(More)
In chicken dorsal root ganglia, calretinin immunoreactivity is expressed by a subpopulation of large A-neurons, most of which co-express calbindin D-28k. The myelinated axons of these neurons selectively innervate all muscle spindles and most Herbst corpuscles associated to feathers in hindlimbs. It is suggested that the presence of calretinin in primary(More)