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Spastin locally amplifies microtubule dynamics to pattern the axon for presynaptic cargo delivery.
bioRxiv
August 2023
Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Neurons rely on long-range trafficking of synaptic components to form and maintain the complex neural networks that encode the human experience. With a single neuron capable of forming thousands of distinct synapses along its axon, spatially precise delivery of the necessary synaptic components is paramount. How these synapses are patterned, and how efficient delivery of synaptic components is regulated, remains largely unknown.
View Article and Find Full Text PDFNerve cells and synapses in the human foetal hypogastric nerves.
Folia Morphol (Warsz)
August 2005
Department of Anatomy, University School of Medical Sciences, Poznań, Poland.
The hypogastric nerves of a human foetus of 220 mm C-R length (23(rd) week) were investigated with an electron microscope. These nerves were composed mainly of bundles of unmyelinated fibres and single myelinated fibres. Small ganglia and single ganglion cells were observed in the hypogastric nerves.
View Article and Find Full Text PDFFormation of synapses on the growth cones in human embryonic inferior ganglion of the vagus.
Folia Morphol (Warsz)
May 2003
Department of Anatomy, University of Medical Sciences, Poznań, Poland.
Ultrastructural study was performed on inferior ganglia of the vagus in human embryos aged 7and 8 weeks (developmental stages 18 to 23, 44 to 56 days). The growth cones are observed between the bundles of axons of the inferior ganglia of the vagus. Many primitive synapses (protosynapses) between dendritic and axonal growth cones are observed.
View Article and Find Full Text PDFChanges in the physiological roles of neurotransmitters during individual development.
Neurosci Behav Physiol
June 1999
N. K. Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia.
The classical neurotransmitters (acetylcholine and biogenic monoamines) are multifunctional substances involved in intra- and intercellular signaling at all stages of ontogenesis in multicellular animals. A cyclical scheme is proposed to describe age-related changes in neurotransmitter functions at different stages of development from oocyte maturation to neuron formation. This may reflect not only the temporospatial organization of neurotransmitter processes, but also the origin of the functions of acetylcholine and biogenic monoamines from the protosynapses of the cleaved embryo to neuronal synapses.
View Article and Find Full Text PDFThe development of synapses in the pyramidal tract at the medullary level in human fetus.
Folia Morphol (Warsz)
October 1994
Department of Anatomy, University Medical School, Poznań.
The ultrastructure of synapses in the pyramidal tract in the medulla oblongata have been described in a human fetus of 220 mm C.-R. length (23 postovulatory weeks).
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