Active attention and the conditioned slow negative potential in schizophrenics

1980 ◽  
Vol 10 (4) ◽  
pp. 328-332 ◽  
Author(s):  
E. G. Briling
Keyword(s):  
Negative Potential ◽  
Active Attention ◽  
Slow Negative Potential

Extrusion of Intracellular Calcium Ion After In Vitro Ischemia in the Rat Hippocampal CA1 Region

2002 ◽  
Vol 88 (2) ◽  
pp. 879-887 ◽  
Author(s):  
E. Tanaka ◽  
H. Uchikado ◽  
S. Niiyama ◽  
K. Uematsu ◽  
H. Higashi
Keyword(s):  
Glial Cells ◽  
Hippocampal Slices ◽  
Negative Potential ◽  
Acetoxymethyl Ester ◽  
Rapid Reduction ◽  
In Vitro Ischemia ◽  
Ca1 Region ◽  
Dc Potential ◽  
Slow Negative Potential

Simultaneous recordings of intracellular Ca2+([Ca2+]i) signal and extracellular DC potential were obtained from the CA1 region in 1-[6-amino-2-(5-carboxy-2-oxazolyl)-5-benzofuranyloxy]-2-(2-amino-5-methylphenoxy)-ethane- N, N, N′, N′-tetraacetic acid penta-acetoxymethyl ester (Fura-2/AM)-loaded rat hippocampal slices. Superfusion with oxygen- and glucose-deprived medium (in vitro ischemia) for 5–6 min produced a rapid rise of the [Ca2+]i level in the stratum radiatum (rising phase of the [Ca2+]i signal), which occurred simultaneously with a rapid negative DC potential (rapid negative potential). When oxygen and glucose were reintroduced, the increased [Ca2+]i signal diminished rapidly (falling phase of the [Ca2+]i signal) during the generation of a slow negative DC potential (slow negative potential), which occurred within 1 min from the onset of the reintroduction. Thereafter, the [Ca2+]i signal partially and the slow negative potential completely returned to the preexposure level approximately 6 min after the reintroduction. The changes in [Ca2+]i signal during and after in vitro ischemia were very similar to the changes in the membrane potential of glial cells. The rising and falling phases of [Ca2+]i signal corresponded to the rapid depolarization and a depolarizing hump, respectively, in the repolarizing phase of glial cells. A prolonged application of in vitro ischemia or a reintroduction of either glucose or oxygen suppressed the falling phase after ischemic exposure. The application of ouabain (30 μM) generated both a rapid negative potential and a rapid elevation of [Ca2+]i, but no slow negative potential or rapid reduction in [Ca2+]i were observed. When oxygen and glucose were reintroduced to slices in the Na+-free or ouabain- or Ni2+-containing medium, the falling phase was suppressed. The falling phase was significantly accelerated in Ca2+- and Mg2+-free with EGTA-containing medium. In contrast, the falling phase was significantly slower in the Ca2+-free with high Mg2+- and EGTA-containing medium. The falling phase of the [Ca2+]isignal after ischemic exposure is thus considered to be primarily dependent on the reactivation of Na+, K+-ATPases, while the extrusion of cytosolic Ca2+ via the forward-mode operation of Na+/Ca2+ exchangers in glial cells is thought to be directly involved in the rapid reduction of [Ca2+]i after ischemic exposure.

Glial origin of the slow negative potential of the direct cortical response: Microelectrode study and mathematical analysis

1982 ◽  
Vol 14 (1) ◽  
pp. 63-70
Author(s):  
A. I. Roitbak ◽  
V. V. Fanardzhyan ◽  
D. S. Melkonyan ◽  
A. A. Melkonyan
Keyword(s):  
Mathematical Analysis ◽  
Negative Potential ◽  
Cortical Response ◽  
Direct Cortical Response ◽  
Slow Negative Potential

Motivational Slow Negative Potential Shift (CNV) Related to Thalamotomy

1978 ◽  
Vol 41 (1-4) ◽  
pp. 202-208 ◽  
Author(s):  
Takashi Tsubokawa ◽  
Nobuo Moriyasu
Keyword(s):  
Negative Potential ◽  
Potential Shift ◽  
Slow Negative Potential

Origin of slow negative potential of direct cortical response in cats

1984 ◽  
Vol 15 (3) ◽  
pp. 234-240
Author(s):  
V. M. Okudzhava ◽  
I. A. Mzhaviya ◽  
V. G. Goff
Keyword(s):  
Negative Potential ◽  
Cortical Response ◽  
Direct Cortical Response ◽  
Slow Negative Potential

Two Components of Slow Negative Potential Shifts during Smooth Goal-directed Hand Movements

1980 ◽  
pp. 755-760 ◽  
Author(s):  
E. Grünewald-Zuberbier ◽  
G. Grünewald ◽  
V. HÖMBERG ◽  
H. Schuhmacher
Keyword(s):  
Negative Potential ◽  
Hand Movements ◽  
Potential Shifts ◽  
Slow Negative Potential

Hemispheric Asymmetry of Feedback-Related Slow Negative Potential Shifts in a Positioning Movement Task

1984 ◽  
Vol 425 (1 Brain and Inf) ◽  
pp. 470-476 ◽  
Author(s):  
GERHARD GRÜNEWALD ◽  
ERIKA GRÜNEWALD-ZUBERBIER ◽  
VOLKER HÖMBERG ◽  
HEINZ SCHUHMACHER
Keyword(s):  
Hemispheric Asymmetry ◽  
Negative Potential ◽  
Potential Shifts ◽  
Slow Negative Potential

PS-29-6 K-complex evoked in NREM sleep is accompanied by a slow negative potential related to cognitive process

1995 ◽  
Vol 97 (4) ◽  
pp. S158
Author(s):  
Osamu Kutsuzawa ◽  
Yoshitsugu Niiyama ◽  
Ryuichi Fujiwara ◽  
Naoki Satoh ◽  
Masahito Fushimi ◽  
...  
Keyword(s):  
Cognitive Process ◽  
Nrem Sleep ◽  
Negative Potential ◽  
Slow Negative Potential

K-complex evoked in NREM sleep is accompanied by a slow negative potential related to cognitive process

1995 ◽  
Vol 95 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Yoshitsugu Niiyama ◽  
Masahito Fushimi ◽  
Atsushi Sekine ◽  
Yasuo Hishikawa
Keyword(s):  
Cognitive Process ◽  
Nrem Sleep ◽  
Negative Potential ◽  
Slow Negative Potential

Neural retinal contribution to the slow negative potential of the canine electroretinogram

1997 ◽  
Vol 94 (4) ◽  
pp. 293-306
Author(s):  
Yutaka Shirao ◽  
Ryohei Wajima ◽  
Toshiyuki Kaneko ◽  
Akira Nishimura
Keyword(s):  
Negative Potential ◽  
Slow Negative Potential
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