Sensory-evoked high-frequency (gamma-band) oscillating potentials in somatosensory cortex of the unanesthetized rat

被引:52
作者
Jones, MS [1 ]
Barth, DS [1 ]
机构
[1] UNIV COLORADO, DEPT PSYCHOL, BOULDER, CO 80309 USA
关键词
gamma oscillation; barrel cortex; EEG; rat;
D O I
10.1016/S0006-8993(97)00639-2
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
A 64-channel epipial electrode array was used to investigate high-frequency (gamma-band) oscillations in somatosensory cortex of the unanesthetized and unrestrained rat. Oscillations were evoked by manual stimulation of the vibrissae and mystacial pad. Stimulation of the contralateral vibrissae resulted in a significant increase in gamma-power during 128-ms epochs taken just following stimulus onset compared to the prestimulus baseline. Stimulation of the ipsilateral vibrissae was completely ineffective in evoking gamma-oscillations in any animals. Sensory evoked gamma-oscillations were constrained to primary (SI) and secondary (SII) somatosensory cortex. When averaged to an arbitrary reference of peak times in one of the channels, these oscillations exhibited a systematic temporal organization, propagating from the rostral portion of SI to the barrel field proper, and finally to SIT. These spatiotemporal characteristics were probably produced by intracortical pathways within rodent somatosensory cortex. The rostrocaudal propagation of gamma-oscillations within the barrel field may also reflect whisking patterns observed when the vibrissae are used as a sensory array, suggesting that synchronized gamma-oscillations may play a role in assembling punctate afferent information provided by the vibrissae into a coherent representation of a somatosensory stimulus. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:167 / 176
页数:10
相关论文
共 37 条
[21]   PATTERNING OF LOCAL INTRACORTICAL PROJECTIONS WITHIN THE VIBRISSAE REPRESENTATION OF RAT PRIMARY SOMATOSENSORY CORTEX [J].
HOEFLINGER, BF ;
BENNETTCLARKE, CA ;
CHIAIA, NL ;
KILLACKEY, HP ;
RHOADES, RW .
JOURNAL OF COMPARATIVE NEUROLOGY, 1995, 354 (04) :551-563
[22]   THE SENSORY CONTRIBUTION OF A SINGLE VIBRISSAS CORTICAL BARREL [J].
HUTSON, KA ;
MASTERTON, RB .
JOURNAL OF NEUROPHYSIOLOGY, 1986, 56 (04) :1196-1223
[23]  
Jones EG, 1985, THALAMUS
[24]   AREAL AND LAMINAR ORGANIZATION OF CORTICOCORTICAL PROJECTIONS IN THE RAT SOMATOSENSORY CORTEX [J].
KORALEK, KA ;
OLAVARRIA, J ;
KILLACKEY, HP .
JOURNAL OF COMPARATIVE NEUROLOGY, 1990, 299 (02) :133-150
[25]   COHERENT 40-HZ OSCILLATION CHARACTERIZES DREAM STATE IN HUMANS [J].
LLINAS, R ;
RIBARY, U .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1993, 90 (05) :2078-2081
[26]   HIGH-FREQUENCY (GAMMA-BAND) OSCILLATING-POTENTIALS IN RAT SOMATOSENSORY AND AUDITORY-CORTEX [J].
MACDONALD, KD ;
BARTH, DS .
BRAIN RESEARCH, 1995, 694 (1-2) :1-12
[27]   Inter- and intra-hemispheric spatiotemporal organization of spontaneous electrocortical oscillations [J].
Macdonald, KD ;
Brett, B ;
Barth, DS .
JOURNAL OF NEUROPHYSIOLOGY, 1996, 76 (01) :423-437
[28]  
MINCIACCHI D, 1993, PERG S NEUR, P209
[29]   COHERENT 25-HZ TO 35-HZ OSCILLATIONS IN THE SENSORIMOTOR CORTEX OF AWAKE BEHAVING MONKEYS [J].
MURTHY, VN ;
FETZ, EE .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1992, 89 (12) :5670-5674
[30]   Oscillatory activity in sensorimotor cortex of awake monkeys: Synchronization of local field potentials and relation to behavior [J].
Murthy, VN ;
Fetz, EE .
JOURNAL OF NEUROPHYSIOLOGY, 1996, 76 (06) :3949-3967