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Titolo:
Widespread projections from subgriseal neurons (Layer VII) to layer I in adult rat cortex
Autore:
Clancy, B; Cauller, LJ;
Indirizzi:
Cornell Univ, Dept Psychol, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 Univ, Dept Psychol, Ithaca, NY 14853 USA Univ Texas, Richardson, TX 75083 USA Univ Texas Richardson TX USA 75083Univ Texas, Richardson, TX 75083 USA
Titolo Testata:
JOURNAL OF COMPARATIVE NEUROLOGY
fascicolo: 2, volume: 407, anno: 1999,
pagine: 275 - 286
SICI:
0021-9967(19990503)407:2<275:WPFSN(>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRIMARY SOMATOSENSORY CORTEX; EARLY POSTNATAL-DEVELOPMENT; ACETYLCHOLINESTERASE-CONTAINING NEURONS; HORSERADISH-PEROXIDASE HRP; PRIMARY VISUAL-CORTEX; CAJAL-RETZIUS CELLS; CEREBRAL-CORTEX; WHITE MATTER; IMMUNOREACTIVE NEURONS; SUBPLATE NEURONS;
Keywords:
interstitial neurons; layer VIb; fluorescent retrograde tracers; subplate; white matter neurons;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
91
Recensione:
Indirizzi per estratti:
Indirizzo: Clancy, B Cornell Univ, Dept Psychol, Urie Hall, Ithaca, NY 14853 USA Cornell Univ Urie Hall Ithaca NY USA 14853 Ithaca, NY 14853 USA
Citazione:
B. Clancy e L.J. Cauller, "Widespread projections from subgriseal neurons (Layer VII) to layer I in adult rat cortex", J COMP NEUR, 407(2), 1999, pp. 275-286

Abstract

Theories of information processing and plasticity in mammalian cortex often rely on knowledge of intracortical networks studied in rodent cortex. Accordingly, the contribution of all cells involved in this circuitry is potentially significant, including connections from a subset of neurons that persist from the developmental subplate, called subgriseal neurons in the present study. Ascending corticocortical connections from subgriseal neurons were identified by using in vivo transport of fluorescent retrograde tracers from discrete applications confined to cortical layer I (approximately 1 mm(2)) or from injections placed into superficial cortical layers. Applications restricted to cortical layer I can be identified by a subsequent retrograde labeling pattern that includes neurons in layers II/III and V but not those in layer TV. In contrast, when retrograde tracer is deposited in layers II/III, layer TV cells are also labeled. By using this identification technique in juvenile and adult rats, widespread interareal projections to superficial layers, including unequivocal connections to cortical layer I, were found to originate from a tangential band of neurons directly below the conventionally identified gray matter (i.e., subgriseal) and from a smaller number of cells in the white matter (WM) proper. Subgriseal and Will neurons were labeled below application and injection sites in somatosensory, auditory, visual, motor, frontal, and adjacent areas at distances of more than 4 mm. However, the subgriseal-to-superficial pathway was not sensitive to nonfluorescent retrograde tracers including horseradish peroxidase. Because neurons in the deeper cortical layers can be strongly influenced through input to their apical dendritic extensions in cortical layer I, the widespread connections described in the present study indicate that the ascending subgriseal projections should be considered in models of mature cortical function. J. Comp. Neurol. 407:275-286, 1999. (C) 1999 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/01/20 alle ore 16:55:17