PMID- 9829795 OWN - NLM STAT- MEDLINE DCOM- 19990126 LR - 20190909 IS - 0735-7044 (Print) IS - 0735-7044 (Linking) VI - 112 IP - 5 DP - 1998 Oct TI - Functional connections between medial prefrontal cortex and caudate-putamen in brain-stimulation reward of rats. PG - 1177-86 AB - Rats were trained to self-stimulate for trains of cathodal pulses delivered via electrodes placed in the medial prefrontal cortex (MPFC) and caudate-putamen (CPu). When the pulses were delivered via 9 ipsilateral MPFC and CPu sites alternately, summation varied from 13% to 40%. However, the overall summation for 2 contralateral MPFC-CPu pairs was 5%, thus indicating a greater integration of ipsilateral than contralateral reward signals. When the interval between alternate pulses decreased in 4 of the 9 ipsilateral pairs, the summation also decreased, an outcome consistent with collision of action potentials passing between the MPFC and CPu sites. The size of the collision effect ranged from 15% to 33%. Estimates of conduction velocity varied between 0.4 to 5.4 m/s, with a 1.7 m/s average. According to these values, the neurons connecting the MPFC and CPu self-stimulation sites appear to be slower than the ones that have been shown to link reward fibers that course between posterior brain regions. FAU - Trzcinska, M AU - Trzcinska M AD - School of Psychology, University of Ottawa, Ontario, Canada. monikat@bu.edu FAU - Bielajew, C AU - Bielajew C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Behav Neurosci JT - Behavioral neuroscience JID - 8302411 SB - IM MH - Animals MH - Caudate Nucleus/cytology/*physiology MH - Conditioning, Operant MH - Electric Stimulation/methods MH - Electrodes, Implanted MH - Male MH - Nerve Net MH - Neural Conduction/physiology MH - Prefrontal Cortex/cytology/*physiology MH - Putamen/cytology/*physiology MH - Rats MH - Rats, Long-Evans MH - Reaction Time MH - Self Stimulation/*physiology EDAT- 1998/11/26 00:00 MHDA- 1998/11/26 00:01 CRDT- 1998/11/26 00:00 PHST- 1998/11/26 00:00 [pubmed] PHST- 1998/11/26 00:01 [medline] PHST- 1998/11/26 00:00 [entrez] AID - 10.1037//0735-7044.112.5.1177 [doi] PST - ppublish SO - Behav Neurosci. 1998 Oct;112(5):1177-86. doi: 10.1037//0735-7044.112.5.1177.