Theta oscillations and sensorimotor performance.
Performance and cognitive effort in humans have recently been related to amplitude and multisite coherence of alpha (7-12 Hz) and theta (4-7 Hz) band electroencephalogram oscillations. I examined this phenomenon in rats by using theta band oscillations of the local field potential to signify sniffing as a sensorimotor process. Olfactory bulb (OB) theta oscillations are coherent with those in the dorsal hippocampus (HPC) during odor sniffing in a two-odor olfactory discrimination task. Coherence is restricted to the high-frequency theta band (6-12 Hz) associated with directed sniffing in the OB and type 1 theta in the HPC. Coherence and performance fluctuate on a time scale of several minutes. Coherence magnitude is positively correlated with performance in the two-odor condition but not in extended runs of single odor conditional-stimulus-positive trials. Simultaneous with enhanced OB-HPC theta band coherence during odor sniffing is a significant decrease in lateral entorhinal cortex (EC)-HPC and OB-EC coherence, suggesting that linkage of the olfactory and hippocampal theta rhythms is not through the synaptic relay from OB to HPC in the lateral EC. OB-HPC coupling at the sniffing frequency is proposed as a mechanism underlying olfactory sensorimotor effort as a cognitive process.
Kay
Leslie M
LM
Department of Psychology, Institute for Mind and Biology, University of Chicago, 940 East 57th Street, Chicago, IL 60637, USA. lkay@uchicago.edu
D000818:Animals; D004193:Discrimination Learning; D006624:Hippocampus / Q000502:physiology*; D008297:Male; D009812:Odorants; D009830:Olfactory Bulb / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013826:Theta Rhythm
J Neurophysiol. 2000 Apr;83(4):1924-31
10758103
Brain Res. 1987 Apr 7;408(1-2):86-96
3594233
Brain Res Cogn Brain Res. 2000 Sep;10(1-2):11-8
10978688
Eur J Neurosci. 2001 Jan;13(2):381-8
11168543
J Neurosci. 2001 May 1;21(9):3175-83
11312302
J Neurosci. 2001 Jun 1;21(11):3955-67
11356884
Behav Brain Res. 2001 Dec 14;127(1-2):119-36
11718888
Neuron. 2002 Jan 31;33(3):325-40
11832222
Neurobiol Learn Mem. 2002 Sep;78(2):470-6
12431431
Hippocampus. 2002;12(5):600-8
12440576
Int J Psychophysiol. 2003 Jan;47(1):75-85
12543448
J Neurophysiol. 2003 Feb;89(2):1057-66
12574480
Neuroreport. 2003 Jul 1;14(9):1221-4
12824763
J Comp Neurol. 2003 Sep 8;464(1):62-97
12866129
Neurosci Lett. 2004 Jan 9;354(2):123-6
14698454
J Neurosci. 2004 Feb 4;24(5):1190-9
14762137
J Integr Neurosci. 2003 Jun;2(1):31-44
15011275
Hippocampus. 2004;14(5):662-74
15301442
Acta Biol Med Ger. 1965;14(5):593-5
5834912
Behav Biol. 1975 Jul;14(3):295-308
1137549
Prog Brain Res. 1990;83:257-68
2203100
Neurosci Lett. 1990 Jul 31;115(2-3):213-8
2234500
J Comp Neurol. 1990 Dec 15;302(3):515-28
1702115
Int J Neurosci. 1990 Aug;53(2-4):261-3
2265947
J Physiol. 1991 Jun;437:305-25
1890637
Brain Res. 1992 Oct 16;593(2):197-208
1450928
Behav Neurosci. 1993 Oct;107(5):740-7
8280384
J Neurosci. 1995 Dec;15(12):7796-809
8613720
Int J Neural Syst. 1996 Sep;7(4):489-95
8968840
Proc Natl Acad Sci U S A. 1997 Jun 24;94(13):7109-14
9192700
Behav Brain Res. 1998 Mar;91(1-2):49-59
9578439
Neurosci Biobehav Rev. 1998 Mar;22(2):233-6
9579314
Behav Neurosci. 1998 Jun;112(3):541-53
9676972
Nature. 1999 Jun 24;399(6738):781-4
10391243
Neuroreport. 2000 Aug 3;11(11):2357-61
10943685
J Neurosci. 1982 Dec;2(12):1705-17
7143047
Behav Neural Biol. 1985 Sep;44(2):201-12
4062774
Nat Neurosci. 1999 Nov;2(11):1003-9
10526340