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P I Lobko

Publications and source records attributed to P I Lobko.

At least 19 recordsLinked to original sources
PubMed1992

[The intermediate nerve system].

A comparative-embryological study (223 fetuses of man, cat, dog, albino rat and mole) has established a similarity in the development and structure of the intermediate nerve in mammalia. The nerve under study represents a complex structural-functional system. Its afferent component includes a geniculate ganglion, a nucleus of the solitary tract, root, peripheral branches. A superior salivary nucleus, a root, pterygopalatine, submandibular, sublingual and auricular (in man) parasympathetic ganglia of the head, peripheral branches. The intermediate nerve fibers are included as additional sources in branches of other cranial nerves, vegetative ganglia and plexuses being spread on a considerable territory of the head. The intermediate nerve is an isolated anatomical structure and deserves being detached into a separate pair of cranial nerves.

Animals↗
PubMed1989

[The intermediate nerve and its place in the system of cranial nerves].

The intermediate nerve (IN) in embryogenesis of man, cat and white rat is formed similarly. From the common with the VIII cranial nerve anlage the geniculum node, the vestibular and cochlear ganglia are emerged. A separated root of the IN connects the geniculum node with the nuclei, situating in the CNS. From the geniculum node main branches of the IN get off: the greater petrosal nerve and the cord of the tympanum, its fibers in the temporal bone canal run in the facial nerve trunk. In the periphery the IN branches unite with other cranial nerves, make connections with branches of vegetative (parasympathetic) ganglia and plexuses. They spread along a large territory, forming a system of parasympathetic innervation in the area of the head and ensuring with specific nervous apparatuses the gustatory organ. It is expedient to select the IN into an independent cranial nerve and confirm it the number of the regular pair.

Animals↗
PubMed1985

[Structure and homodynamia of the intersegmental connection TI-TII].

The reason to consider the second thoracic cerebrospinal nerve (Th2) as one of the sources of the brachial plexus is the fact of the intersegmentary connection between Th1 and Th2 by means of a neural branch situating on the internal surface of the thorax near the vertebral column (the intrathoracic or paravertebral branch). However, not all cases of the intersegmentary connection Th1-Th2 should be regarded only as participation of Th2 in the formation of the brachial plexus, this is conditioned by certain peculiarities of its structure and by the character of interconnections with the I intercostal nerve. The macro-microscopic method demonstrates that the intersegmentary connection Th1-Th2 includes somatic and vegetative components, that to the same extent participate both in formation of the brachial plexus and in the I intercostal nerve. The intersegmentary connection Th1-Th2 is considered as a vegetative neural structure, containing somatic conductors and is considered as a homologue of superficial connective branches. It is the way, by which sympathetic fibers can reach the brachial plexus from the segment situating below, without passing through the superior thoracic nodes of the sympathetic trunk.

Brachial Plexus↗
PubMed1979

Ganglia formation of the peripheral nervous system.

Embryologic studies have shown that the ganglions of the peripheral nervous system are formed by the neuroblasts from the central nervous system. The histotopography of the neurons and their segmental communications with the central nervous system are established experimentally (segmental section of the ventral roots and resection of the spinal nodes: 100 experiments). It is proved that the neurons, which communicate with the definite segment of the spinal cord, are diffusely distributed in the ganglion mass.

Animals↗
PubMed1979

Functional anatomy of physiologic atresia in human and mammal embryogenesis.

1. Physiological atresias represent temporal functionate structures that appear and disappear in various organs at different stages in embryonic development. 2. The phenomen of physiological atresia has its morphological and time characteristics in different organs and systems. The universal occurrence of the epithelial adhesion observed in the viscera and natural apertures in the body have functional significance for the embryo in its adaptation to the development in the amniotic medium. 3. Deviations in recanalization of fetal occlusions result in the appearance of congenital atresia and other defects in the development. This is grounded by some indirect evidences. 4. Detailed a knowledge of embryogenesis has clinical importance in explaining the observed congenital anomaly and for their diagnosis and correction.

Animals↗
PubMed1977

[Development of the nasal cavity and formation of the nostrils in human embryogenesis].

The development of nasal cavity was traced in human embryos. The identity in the primitive formation of the mouth cavity and that of the nasal cavity is stated. During embryogenesis, the primitive nasal cavities are demonstrated to change their position concerning the mouth cavity. Epithelial "cluster" formation in the area of the nostrils is examined: it appears in embryos of 16-19 mm long, is mostly prominent in embryos of 50-55 mm long, is absent in fetuses of 5.5 months old. By comparing the terms and dynamics in the development of epithelial adhesion in the larynx an the nostrils, the importance of these temporal structures for protecting the respiratory tract of the embryo from amniotic fluid is demonstrated.

Female↗