title: [Structural organization of the synaptic connections of developing neurons in the anterior horns of the spinal cord in early human fetuses].
abstract: Synaptogenesis in the presumptive anterior horns of the spinal cord in early human fetuses (weeks 11 -- 12 of intrauterine development) was studied by electron microscopy. In this period of human nervous system development, various stages of the synaptic contact forming process were elucidated in the region under study: from the growth cone attachment to the neuroblastic surfaces up to mature synapses. The appearance of the first synaptic complexes provides evidence of the presence of the high-functional specialization of the synaptic apparatus in the course of differentiation of motoneurons of the spinal cord in the early stages of human antenatal ontogenesis.
mesh_terms: D002454:Cell Differentiation; D006801:Humans; D008854:Microscopy, Electron; D009046:Motor Neurons / Q000648:ultrastructure; D013116:Spinal Cord / Q000166:cytology / Q000196:embryology* / Q000648:ultrastructure; D013569:Synapses / Q000648:ultrastructure; D013572:Synaptic Vesicles / Q000648:ultrastructure; D013574:Synaptosomes / Q000648:ultrastructure
vernacular_title: Strukturnaia organizatsiia sinapticheskikh sviazeĭ razvivaiushchikhsia neĭronov v perednikh rogakh spinnogo mozga u rannikh plodov cheloveka.