Dose and behavioral context dependent inhibition of movement and basal ganglia neural activity by ??9-tetrahydrocannabinol during spontaneous and treadmill locomotion tasks in rats

Synapse ◽  
2004 ◽  
Vol 55 (1) ◽  
pp. 1-16 ◽  
Author(s):  
L.H. Shi ◽  
F. Luo ◽  
D.J. Woodward ◽  
J.Y. Chang
Keyword(s):  
Basal Ganglia ◽  
Neural Activity ◽  
Behavioral Context ◽  
Dependent Inhibition ◽  
Context Dependent ◽  
Treadmill Locomotion

Serotonin sets the day state in the neurons that control coupling between the optic lobe circadian pacemakers in the cricketGryllus bimaculatus

2002 ◽  
Vol 205 (9) ◽  
pp. 1305-1314 ◽  
Author(s):  
A. S. M. Saifullah ◽  
Kenji Tomioka
Keyword(s):  
Neural Activity ◽  
Receptor Agonist ◽  
Serotonin Receptor ◽  
Optic Lobe ◽  
Neural Pathway ◽  
Gryllus Bimaculatus ◽  
Dependent Inhibition ◽  
Serotonin Receptor Antagonist ◽  
Time Dependent Inhibition ◽  
Circadian Pacemakers

SUMMARYThe bilaterally paired optic lobe circadian pacemakers of the cricket Gryllus bimaculatus mutually exchange photic and circadian information to keep their activity synchronized. The information is mediated by a neural pathway, consisting of the so-called medulla bilateral neurons,connecting the medulla areas of the two optic lobes. We investigated the effects of serotonin on the neural activity in this coupling pathway. Spontaneous and light-induced electrical activity of the neurons in the coupling pathway showed daily variations, being more intense during the night than the day. Microinjection of serotonin or a serotonin-receptor agonist,quipazine, into the optic lobe caused a dose- and time-dependent inhibition of spontaneous and light-induced responses, mimicking the day state. The amount of suppression was greater and the recovery from the suppression occurred faster during the night. Application of metergoline, a non-selective serotonin-receptor antagonist, increased spontaneous activity and light-evoked responses during both the day and the night, with higher effect during the day. In addition, metergoline effectively attenuated the effects of serotonin. These facts suggest that in the cricket's optic lobe, serotonin is released during the daytime and sets the day state in the neurons regulating coupling between the bilaterally paired optic lobe circadian pacemakers.

Changes in amygdala neural activity that occur with the extinction of context-dependent conditioned fear stress

2008 ◽  
Vol 90 (3) ◽  
pp. 297-304 ◽  
Author(s):  
Takeshi Izumi ◽  
Takeshi Inoue ◽  
Akiko Kato ◽  
Yuji Kitaichi ◽  
Shin Nakagawa ◽  
...  
Keyword(s):  
Neural Activity ◽  
Conditioned Fear ◽  
Conditioned Fear Stress ◽  
Context Dependent

scholarly journals Spatial Patterns of Persistent Neural Activity Vary with the Behavioral Context of Short-Term Memory

Neuron ◽  
2015 ◽  
Vol 85 (4) ◽  
pp. 847-860 ◽  
Author(s):  
Kayvon Daie ◽  
Mark S. Goldman ◽  
Emre R.F. Aksay
Keyword(s):  
Spatial Patterns ◽  
Neural Activity ◽  
Short Term Memory ◽  
Behavioral Context ◽  
Short Term ◽  
Term Memory
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