Riitta Hari – författare

Magnetoencephalography (MEG) and electroencephalography (EEG) provide complementary views to the neurodynamics of healthy and diseased human brains. Both methods are totally noninvasive and can track with millisecond temporal resolution spontaneous brain activity, evoked responses to various sensory stimuli, as well as signals associated with the performance of motor, cognitive and affective tasks.MEG records the magnetic fields, and EEG the potentials associated with the same neuronal currents, which however are differentially weighted due to the physical and physiological differences between the methods. MEG is rather selective to activity in the walls of cortical folds, whereas EEG senses currents from the cortex (and brain) more widely, making it harder to pinpoint the locations of the source currents in the brain. Another important difference between the methods is that skull and scalp dampen and smear EEG signals, but do not affect MEG. Hence, to fully understand brain function, information from MEG and EEG should be combined. Additionally, the excellent neurodynamical information these two methods provide can be merged with data from other brain-imaging methods, especially functional magnetic resonance imaging where spatial resolution is a major strength.MEG-EEG Primer is the first-ever volume to introduce and discuss MEG and EEG in a balanced manner side-by-side, starting from their physical and physiological bases and then advancing to methods of data acquisition, analysis, visualization, and interpretation. The authors pay special attention to careful experimentation, guiding readers to differentiate brain signals from various artifacts and to assure that the collected data are reliable. The book weighs the strengths and weaknesses of MEG and EEG relative to one another and to other methods used in systems, cognitive, and social neuroscience. The authors also discuss the role of MEG and EEG in the assessment of brain function in various clinical disorders. The book aims to bring members of multidisciplinary research teams onto equal footing so that they can contribute to different aspects of MEG and EEG research and to be able to participate in future developments in the field.

Magnetoencephalography (MEG) and electroencephalography (EEG) provide complementary views to the neurodynamics of healthy and diseased human brains. Both methods are totally noninvasive and can track with millisecond temporal resolution spontaneous brain activity, evoked responses to various sensory stimuli, as well as signals associated with the performance of motor, cognitive and affective tasks.MEG records the magnetic fields, and EEG the potentials associated with the same neuronal currents, which however are differentially weighted due to the physical and physiological differences between the methods. MEG is rather selective to activity in the walls of cortical folds, whereas EEG senses currents from the cortex (and brain) more widely, making it harder to pinpoint the locations of the source currents in the brain. Another important difference between the methods is that skull and scalp dampen and smear EEG signals, but do not affect MEG. Hence, to fully understand brain function, information from MEG and EEG should be combined. Additionally, the excellent neurodynamical information these two methods provide can be merged with data from other brain-imaging methods, especially functional magnetic resonance imaging where spatial resolution is a major strength.MEG-EEG Primer is the first-ever volume to introduce and discuss MEG and EEG in a balanced manner side-by-side, starting from their physical and physiological bases and then advancing to methods of data acquisition, analysis, visualization, and interpretation. The authors pay special attention to careful experimentation, guiding readers to differentiate brain signals from various artifacts and to assure that the collected data are reliable. The book weighs the strengths and weaknesses of MEG and EEG relative to one another and to other methods used in systems, cognitive, and social neuroscience. The authors also discuss the role of MEG and EEG in the assessment of brain function in various clinical disorders. The book aims to bring members of multidisciplinary research teams onto equal footing so that they can contribute to different aspects of MEG and EEG research and to be able to participate in future developments in the field.

MEG-EEG Primer presents the basic A-to-Z of two non-invasive human electrophysiological methods, magnetoencephalography (MEG) and electroencephalography (EEG). These methods are used to study human brain dynamics, tracking the brain's responses to sensory, cognitive, and social stimuli. This book, now in its second edition, remains the only volume of its kind that discusses both MEG and EEG side-by-side, for an integrated understanding of brain function. In 22 chapters with almost two hundred color figures, the book covers the basic physical and physiological foundations of these two methods, the historical background and development of their implementation, instrumentation, recording techniques, data analysis, and interpretation.The new edition includes expanded text on MEG and EEG sensor types and amplifiers, artifacts, new analysis tools, open data repositories, and novel instrumentation. Due to new concerns from the COVID-19 pandemic, general infection control in MEG/EEG laboratories is also discussed. Interoception is introduced as an interesting emerging research field. Moreover, future developments in MEG and EEG are examined with respect to new and evolving technologies, and new applications for their use. Overall, MEG-EEG Primer puts into perspective the role of MEG and EEG in neuroscience research at large, and the future of our understanding of the dynamics of human brain function.

Mitä tapahtuisi, jos ihmisellä olisi kanan aivot? Haluaisimmeko nokkia jyviä ja nukkua orrella? Murehtisimmeko seuraavaa päivää?Koululaisen kysymys kananaivoisesta ihmisestä johdattaa pitkän linjan neurotieteilijän pohtimaan, mitä merkitystä aivoilla on toiminnassamme ja miksi ihmisaivot ovat kehittyneet juuri tietynlaisiksi. Mieli, aivot, keho ja ympäristö muodostavat monimutkaisen systeemin, jota ei voi ymmärtää tarkastelemalla vain yhtä osasta kerrallaan.Jos sinulla olisi kanan aivot avaa yllättäviäkin näkökulmia aivojen ja mielen toimintaan. Kuinka havainnot syntyvät? Miten ajattelu ja liikkuminen kytkeytyvät toisiinsa? Millä tavalla sosiaalinen vuorovaikutus muovaa aivoja ja mieltä? Mitä mielensisällöistä voidaan päätellä aivokuvantamisen perusteella? Teos kutsuu kurkistamaan neurotieteen kiehtovaan maailmaan ja tarjoaa vahvan pohjan aivojen ja mielen ymmärtämiselle.

Mitä tapahtuisi, jos ihmisellä olisi kanan aivot? Haluaisimmeko nokkia jyviä ja nukkua orrella? Murehtisimmeko seuraavaa päivää?Koululaisen kysymys kananaivoisesta ihmisestä johdattaa pitkän linjan neurotieteilijän pohtimaan, mitä merkitystä aivoilla on toiminnassamme ja miksi ihmisaivot ovat kehittyneet juuri tietynlaisiksi. Mieli, aivot, keho ja ympäristö muodostavat monimutkaisen systeemin, jota ei voi ymmärtää tarkastelemalla vain yhtä osasta kerrallaan.Jos sinulla olisi kanan aivot avaa yllättäviäkin näkökulmia aivojen ja mielen toimintaan. Kuinka havainnot syntyvät? Miten ajattelu ja liikkuminen kytkeytyvät toisiinsa? Millä tavalla sosiaalinen vuorovaikutus muovaa aivoja ja mieltä? Mitä mielensisällöistä voidaan päätellä aivokuvantamisen perusteella? Teos kutsuu kurkistamaan neurotieteen kiehtovaan maailmaan ja tarjoaa vahvan pohjan aivojen ja mielen ymmärtämiselle.