Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
DIFFERENTIAL PHASIC MODULATION OF SHORT AND LONG-LATENCY AFFERENT SENSORY TRANSMISSION TO SINGLE NEURONS IN THE VENTROPOSTEROLATERAL THALAMUS IN BEHAVING RATS
Autore:
SHIN HC; PARK HJ; CHAPIN JK;
Indirizzi:
HALLYM UNIV,SCH MED,DEPT PHYSIOL,1 OKCHUN DONG KANGWAN DO 200702 SOUTH KOREA HAHNEMANN UNIV,DEPT PHYSIOL & BIOPHYS PHILADELPHIA PA 19102
Titolo Testata:
Neuroscience research
fascicolo: 2, volume: 17, anno: 1993,
pagine: 117 - 125
SICI:
0168-0102(1993)17:2<117:DPMOSA>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOMATOSENSORY CORTICAL-NEURONS; VOLUNTARY MOVEMENT; CORTEX; CAT; REPRESENTATION; RESPONSIVENESS; RESPONSES; SYSTEM; AWAKE;
Keywords:
VPL THALAMUS; AFFERENT MODULATION; LOCOMOTION; GATING; CHRONIC SINGLE UNIT RECORDING; AFFERENT TRANSMISSION; SHORT LATENCY RESPONSE; LONG LATENCY RESPONSE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
H.C. Shin et al., "DIFFERENTIAL PHASIC MODULATION OF SHORT AND LONG-LATENCY AFFERENT SENSORY TRANSMISSION TO SINGLE NEURONS IN THE VENTROPOSTEROLATERAL THALAMUS IN BEHAVING RATS", Neuroscience research, 17(2), 1993, pp. 117-125

Abstract

Single neurons were recorded in the forepaw area of the ventroposterolateral (VPL) thalamus of awake rats during rest and running behaviors. Locomotor step cycle dependent changes of the transmission of the short (4.0 +/- 0.1-10.1 +/- 0.3 ms, SEURs) and the long (10.2 +/- 0.2-26.0 +/- 2.1 ms, LEURs) latency somatic sensory responses were tested bygenerating post-stimulus time histograms of these neurons' responses to stimulation through electrodes chronically implanted under the skinof the forepaw. The magnitudes of firing during these responses were measured and normalized as percent increases over background firing. Times of footfall were determined through frame-by-frame analyses of video recordings and peri-footfall histograms were generated to differentiate a total of 40 VPL thalamic neurons into two types, footfall responsive (n = 21) and unresponsive (n = 19) neurons. Perifootfall gatingpatterns were determined for both types of cells. The SEURs and the LEURs showed significantly different phasic sensory modulation patternsacross the locomotor step cycle. Major difference of the sensory modulations between footfall responsive and footfall unresponsive cells was noted during swing phase of the locomotor step cycle. In footfall responsive cells, the SEURs were suppressed most strongly just after footfall, while the LEURs were tonically suppressed during late stance and swing phases. The SEURs were disinhibited during the swing phase, while the LEURs were disinhibited during the middle stance phase. In footfall unresponsive cells, the LEURs were suppressed more strongly around footfall event than the SEURs were. These results suggest that the short and the long latency sensory responses of footfall responsive and footfall unresponsive VPL thalamic cells may be subject to temporally specific, differential gating processes during locomotion.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/01/21 alle ore 02:23:56