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001-es BibID:	BIBFORM029956
Első szerző:	Lévai G.
Cím:	Fine structure of dorsal root terminals in the dorsal horn of the frog spinal cord / G. Lévai, C. Matesz, G. Székely
Dátum:	1982
ISSN:	0001-5288
Megjegyzések:	Dorsal root fibers were labelled with cobalt and their terminals were identified in an oval-shaped area and in its lateral extension of the dorsal horn. These areas receive mainly cutaneous afferents. A number of labelled terminals exhibited either an electron lucent and swollen, or an electron dense and shrunken form of degeneration. The majority of the labelled terminals could be classified into three groups. Type A terminals were small, less than 2 microns in diameter, and lightly stained. Type B terminals were larger and neurofilaments and an electron dense material resulted in a dark staining of the bouton. Type C terminals contained medium size granulated vesicles. The type A and type B terminals were frequently found in postsynaptic positions. The presynaptic profiles contained spheric or elliptic vesicles, or they exhibited the structural characters of presynaptic dendrites. Preterminal dorsal root fibers, identified on account of their cobalt label, were also found in postsynaptic positions to the same kinds of presynaptic profiles. It is concluded that cobalt labelling is sufficiently selective for a reliable identification of dorsal root terminals. No correlation was found between the different forms of degeneration and the different types of terminal boutons. The possible functional significance of the postsynaptic relation of dorsal root fibers and terminals to a variety of presynaptic profiles is discussed.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény hazai lapban egyetemen (Magyarországon) készült közlemény
Megjelenés:	Acta Biologica Academiae Scientiarum Hungaricae. - 33 : 2-3 (1982), p. 231-246. -
További szerzők:	Székely György (1926-2017) (neurobiológus) Matesz Klára (1949-) (anatómus, neurobiológus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM029804
Első szerző:	Székely György (neurobiológus)
Cím:	Primary afferent terminals in the nucleus of the solitary tract of the frog : an electron microscopic study / G. Székely, G. Lévai, K. Matesz
Dátum:	1983
Megjegyzések:	In the frog solitarius nucleus, primary afferent terminals of the facial and glossopharyngeal-vagal nerves were identified with cobalt labelling and electron microscopy. The labelled terminals were grouped in two main categories, one with small (1-2 micron) and pale terminals, and another with large (3-5 micron) and dark terminals. The small terminals greatly outnumbered the large ones. In addition many terminals intermediate in size and staining reactions were found. All kinds of labelled boutons contained medium-size clear synaptic vesicles, among which dense-core vesicles of the smaller type frequently occurred. The labelled primary afferent terminals established axo-dendritic contacts of the asymmetric type. Close to these contact sites they were themselves very frequently contacted by a profile interpreted as presynaptic in relation to them. Such profiles contained spherical, pleomorphic (including dense-core) or flattened vesicles; a fourth kind was interpreted as presynaptic dendrites. It is concluded that viscerosensory fibres, as opposed to somatosensory fibres, predominantly generate small and lightly stained terminals. It is likely that the effect of synaptic transmission at the solitarius tract terminals is modulated in a very versatile manner by the various presynaptic profiles converging on these terminals.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban egyetemen (Magyarországon) készült közlemény
Megjelenés:	Experimantal Brain Research. - 53 : 1 (1983), p. 109-117. -
További szerzők:	Lévai G. Matesz Klára (1949-) (anatómus, neurobiológus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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