Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\28451642
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 eNeuro
2017 ; 4
(2
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Impulsive Rats Exhibit Blunted Dopamine Release Dynamics during a Delay
Discounting Task Independent of Cocaine History
#MMPMID28451642
Moschak TM
; Carelli RM
eNeuro
2017[Mar]; 4
(2
): ä PMID28451642
show ga
The inability to wait for a large, delayed reward when faced with a small,
immediate one, known as delay discounting, has been implicated in a number of
disorders including substance abuse. Individual differences in impulsivity on the
delay discounting task are reflected in differences in neural function, including
in the nucleus accumbens (NAc) core. We examined the role of a history of cocaine
self-administration, as well as individual differences in impulsivity, on rapid
dopamine (DA) release dynamics in the NAc core. Rats with a history of cocaine or
water/saline self-administration were tested on delay discounting while being
simultaneously assayed for rapid DA release using electrochemical methods. In
controls, we found that cue DA release was modulated by reward delay and
magnitude, consistent with prior reports. A history of cocaine had no effect on
either delay discounting or DA release dynamics. Nonetheless, independent of drug
history, individual differences in impulsivity were related to DA release in the
NAc core. First, high impulsive animals exhibited dampened cue DA release during
the delay discounting task. Second, reward delay and magnitude in high impulsive
animals failed to robustly modulate changes in cue DA release. Importantly, these
two DAergic mechanisms were uncorrelated with each other and, together, accounted
for a high degree of variance in impulsive behavior. Collectively, these findings
demonstrate two distinct mechanisms by which rapid DA signaling may influence
impulsivity, and illustrate the importance of NAc core DA release dynamics in
impulsive behavior.