CHARACTERIZATION OF SPONTANEOUS MEG RHYTHMS IN HEALTHY-ADULTS

被引：220

作者：

SALMELIN, R

HARI, R

机构：

[1] Low Temperature Laboratory, Helsinki University of Technology

来源：

ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1994年 / 91卷 / 04期

关键词：

CORTEX; NEUROMAGNETISM; RHYTHMS; (HUMAN);

D O I：

10.1016/0013-4694(94)90187-2

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

We analyzed spontaneous MEG activity, measured with a whole-head neuromagnetometer in 7 healthy, relaxed adults. Rhythmic activity concentrated over the rolandic and parieto-occipital regions and contained spectral components in the 10 and 20 Hz ranges, each showing distinct reactivity. Sources of the rhythmic activity in different frequency ranges were localized within the brain and related to the sites of the auditory, visual, and somatosensory projection cortices. The sources of the rolandic mu rhythms concentrated in restricted areas of 3-5 cm in diameter, close to the hand projection area in the first somatomotor cortex. The posterior alpha activity received a significant contribution from the vicinity of the parieto-occipital fissure. Combination of spectral analysis, reactivity of the rhythms with respect to tasks or stimuli and source localization will allow focusing on well-specified cortical rhythms and assist in gaining an understanding of the functional significance of cortical rhythms.

引用

页码：237 / 248

页数：12

共 22 条

[1] 122-CHANNEL SQUID INSTRUMENT FOR INVESTIGATING THE MAGNETIC SIGNALS FROM THE HUMAN BRAIN [J].

AHONEN, AI ;

HAMALAINEN, MS ;

KAJOLA, MJ ;

KNUUTILA, JET ;

LAINE, PP ;

LOUNASMAA, OV ;

PARKKONEN, LT ;

SIMOLA, JT ;

TESCHE, CD .

PHYSICA SCRIPTA, 1993, T49A :198-205

[2]

BUSER P, 1987, TXB CLIN NEUROPHYSIO, P595

[3] SELECTIVE LOCALIZATION OF ALPHA-BRAIN ACTIVITY WITH NEUROMAGNETIC MEASUREMENTS [J].

CHAPMAN, RM ;

ILMONIEMI, RJ ;

BARBANERA, S ;

ROMANI, GL .

ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY, 1984, 58 (06) :569-572

[4] THE BLOCKING OF THE ROLANDIC WICKET RHYTHM AND SOME CENTRAL CHANGES RELATED TO MOVEMENT [J].

CHATRIAN, GE ;

PETERSEN, MC ;

LAZARTE, JA .

ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY, 1959, 11 (03) :497-510

[5] CORTICAL SOURCE OF ALPHA-RHYTHM [J].

DASILVA, FHL ;

VANLEEUWEN, WS .

NEUROSCIENCE LETTERS, 1977, 6 (2-3) :237-241

[6]

GASTAUT MH, 1952, REV NEUROL, V87, P176

[7] MAGNETOENCEPHALOGRAPHY - THEORY, INSTRUMENTATION, AND APPLICATIONS TO NONINVASIVE STUDIES OF THE WORKING HUMAN BRAIN [J].

HAMALAINEN, M ;

HARI, R ;

ILMONIEMI, RJ ;

KNUUTILA, J ;

LOUNASMAA, OV .

REVIEWS OF MODERN PHYSICS, 1993, 65 (02) :413-497

[8]

Hari R, 1993, ELECTROENCEPHALOGRAP, P1035

[9] FUNCTIONAL TOPOGRAPHY OF HUMAN MU RHYTHM [J].

KUHLMAN, WN .

ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY, 1978, 44 (01) :83-93

[10] GENERATOR SITES OF SPONTANEOUS MEG ACTIVITY DURING SLEEP [J].

LU, ST ;

KAJOLA, M ;

JOUTSINIEMI, SL ;

KNUUTILA, J ;

HARI, R .

ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY, 1992, 82 (03) :182-196

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