FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1991038443> ?p ?o ?g. }

• W1991038443 endingPage "964" @default.
• W1991038443 startingPage "927" @default.
• W1991038443 abstract "The efferent projections of the periaqueductal gray in the rabbit have been described by anterograde tract-tracing techniques following deposits of tritiated leucine, or horseradish peroxidase, into circumscribed sites within dorsal, lateral or ventral periaqueductal gray. No attempts were made to place labels in the fourth, extremely narrow (medial), region immediately surrounding the aqueduct whose size and disposition did not lend itself to confined placements of label within it. These anatomically distinct regions, defined in Nissl-stained sections, corresponded to the same regions into which deposits of horseradish peroxidase were made in order for us to describe afferent projections to the periaqueductal gray. In this present study distinct ascending and descending fibre projections were found throughout the brain. Terminal labelling was detected in more than 80 sites, depending somewhat upon which of the three regions of the periaqueductal gray received the deposit. Therefore, differential projections with respect to both afferent and efferent connections of these three regions of the periaqueductal gray have now been established. Ventral deposits disclosed a more impressive system of ramifying, efferent fibres than did dorsal or lateral placements of labels. With ventral deposits, ascending fibres were found to follow two major pathways from periaqueductal gray. The periventricular bundle bifurcates at the level of the posterior commissure to form hypothalamic and thalamic components which distribute to the anterior pretectal region, lateral habenulae, and nuclei of the posterior commissure, the majority of the intralaminar and midline thalamic nuclei, and to almost all of the hypothalamus. The other major ascending pathway from the periaqueductal gray takes a ventrolateral course from the deposit site through the reticular formation or, alternatively, through the deep and middle layers of the superior colliculus, to accumulate just medial to the medial geniculate body. This contingent of fibres travels more rostrally above the cerebral peduncle, distributing terminals to the substantia nigra, ventral tegmental area and parabigeminal nucleus before fanning out and turning rostrally to contribute terminals to ventral thalamus, subthalamus and zona incerta, then continuing on to supply amygdala, substantia innominata, lateral preoptic nucleus, the diagonal band of Broca and the lateral septal nucleus. Caudally directed fibres were also observed to follow two major routes. They either leave the periaqueductal gray dorsally and pass through the gray matter in the floor of the fourth ventricle towards the abducens nucleus and ventral medulla, or are directed ventrally after passing through either the inferior colliculus or parabrachial nucleus. These ventrally directed fibres merge just dorsal to the pons on the ventral surface of the brain.(ABSTRACT TRUNCATED AT 400 WORDS)" @default.
• W1991038443 created "2016-06-24" @default.
• W1991038443 creator A5009931515 @default.
• W1991038443 creator A5018897401 @default.
• W1991038443 date "1986-11-01" @default.
• W1991038443 modified "2023-10-13" @default.
• W1991038443 title "Afferent projections to the periaqueductal gray in the rabbit" @default.
• W1991038443 cites W1574530685 @default.
• W1991038443 cites W1886830920 @default.
• W1991038443 cites W1952039887 @default.
• W1991038443 cites W1963482390 @default.
• W1991038443 cites W1964029490 @default.
• W1991038443 cites W1965756192 @default.
• W1991038443 cites W1966101477 @default.
• W1991038443 cites W1966511690 @default.
• W1991038443 cites W1966740151 @default.
• W1991038443 cites W1967278647 @default.
• W1991038443 cites W1968148853 @default.
• W1991038443 cites W1968541451 @default.
• W1991038443 cites W1968881072 @default.
• W1991038443 cites W1971767672 @default.
• W1991038443 cites W1975756729 @default.
• W1991038443 cites W1976187306 @default.
• W1991038443 cites W1978841870 @default.
• W1991038443 cites W1979331239 @default.
• W1991038443 cites W1979527879 @default.
• W1991038443 cites W1979588582 @default.
• W1991038443 cites W1979692529 @default.
• W1991038443 cites W1979780478 @default.
• W1991038443 cites W1982819050 @default.
• W1991038443 cites W1983145235 @default.
• W1991038443 cites W1983239969 @default.
• W1991038443 cites W1985023977 @default.
• W1991038443 cites W1987107045 @default.
• W1991038443 cites W1988571628 @default.
• W1991038443 cites W1989384897 @default.
• W1991038443 cites W1989434173 @default.
• W1991038443 cites W1991224938 @default.
• W1991038443 cites W1992110125 @default.
• W1991038443 cites W1993320854 @default.
• W1991038443 cites W1993580402 @default.
• W1991038443 cites W1993672558 @default.
• W1991038443 cites W1994667916 @default.
• W1991038443 cites W1994732579 @default.
• W1991038443 cites W1995770847 @default.
• W1991038443 cites W1998766123 @default.
• W1991038443 cites W2000346213 @default.
• W1991038443 cites W2003589127 @default.
• W1991038443 cites W2003859324 @default.
• W1991038443 cites W2006387884 @default.
• W1991038443 cites W2006547733 @default.
• W1991038443 cites W2009111595 @default.
• W1991038443 cites W2010127244 @default.
• W1991038443 cites W2012081790 @default.
• W1991038443 cites W2012540168 @default.
• W1991038443 cites W2013373220 @default.
• W1991038443 cites W2015216368 @default.
• W1991038443 cites W2018916525 @default.
• W1991038443 cites W2019244105 @default.
• W1991038443 cites W2019402991 @default.
• W1991038443 cites W2020460680 @default.
• W1991038443 cites W2022752214 @default.
• W1991038443 cites W2023568038 @default.
• W1991038443 cites W2023889261 @default.
• W1991038443 cites W2024133387 @default.
• W1991038443 cites W2025414544 @default.
• W1991038443 cites W2027061276 @default.
• W1991038443 cites W2027150907 @default.
• W1991038443 cites W2027814626 @default.
• W1991038443 cites W2028053130 @default.
• W1991038443 cites W2028364595 @default.
• W1991038443 cites W2029710160 @default.
• W1991038443 cites W2031857349 @default.
• W1991038443 cites W2033470468 @default.
• W1991038443 cites W2033570816 @default.
• W1991038443 cites W2034164499 @default.
• W1991038443 cites W2034603599 @default.
• W1991038443 cites W2036070936 @default.
• W1991038443 cites W2036288970 @default.
• W1991038443 cites W2036736976 @default.
• W1991038443 cites W2038255717 @default.
• W1991038443 cites W2040468588 @default.
• W1991038443 cites W2042041295 @default.
• W1991038443 cites W2042621122 @default.
• W1991038443 cites W2046094549 @default.
• W1991038443 cites W2046918301 @default.
• W1991038443 cites W2046995451 @default.
• W1991038443 cites W2047227717 @default.
• W1991038443 cites W2048620202 @default.
• W1991038443 cites W2048712968 @default.
• W1991038443 cites W2048726661 @default.
• W1991038443 cites W2049545730 @default.
• W1991038443 cites W2050637257 @default.
• W1991038443 cites W2052125071 @default.
• W1991038443 cites W2052433914 @default.
• W1991038443 cites W2054183692 @default.
• W1991038443 cites W2054557187 @default.
• W1991038443 cites W2054675555 @default.

• next