title: [Structure of the neuromuscular spindles in the tongue of human fetuses].
abstract: The dynamics in development of some components--of the neuromuscular spindles in the human fetus and newborn tongues have been studied by means of certain general and neurohistological methods with elements of morphometry. During the whole prenatal period of the human life, there is a certain synchronism in the development of the lingual proper muscles and the neuro-muscular spindles. Certain integration in the development of the neuro-muscular spindles is observed in 4-6-month-old fetuses; in 8-9-month-old fetuses and in newborns it is substituted for heterochronicity. By the time of birth, the muscle spindle contractile elements are supplied with a more differentiated efferent innervation. The latter actively effects the morphological state of the intrafusal muscle fibers and forms a base for functional activity of the tongue.
mesh_terms: D002454:Cell Differentiation; D006801:Humans; D007231:Infant, Newborn; D009470:Muscle Spindles / Q000166:cytology / Q000196:embryology*; D013997:Time Factors; D014059:Tongue / Q000196:embryology / Q000294:innervation*
vernacular_title: Stroenie nervno-myshechnykh vereten v iazyke u plodov cheloveka.