Ihmisen aivokuoritoiminnot : neuromagneettisia tutkimustuloksia

Riitta Hari

Ovatko ajatukset aivoissamme?

Kirjoittaja on professori Teknillisessä korkeakoulussa ja Kylmälaboratorion Aivotutkimusyksikön johtaja. Kirjoitus perustuu Suomen kulttuurirahaston vuosijuhlassa 27.2.2006 pidettyyn juhlaesitelmään

Coinciding early activation of the human primary visual cortex and anteromedial cuneus

Proper understanding of processes underlying visual perception requires information on the activation order of distinct brain areas. We measured dynamics of cortical signals with magnetoencephalography while human subjects viewed stimuli at four visual quadrants. The signals were analyzed with minimum current estimates at the individual and group level. Activation emerged 55–70 ms after stimulus onset both in the primary posterior visual areas and in the anteromedial part of the cuneus. Other cortical areas were active after this initial dual activation. Comparison of data between species suggests that the anteromedial cuneus either comprises a homologue of the monkey area V6 or is an area unique to humans. Our results show that visual stimuli activate two cortical areas right from the beginning of the cortical response. The anteromedial cuneus has the temporal position needed to interact with the primary visual cortex V1 and thereby to modify information transferred via V1 to extrastriate cortices.

[Archives de la parole]. , Stances sanskrites / Hari Chand, voix

Enregistrement : Paris, Université de Paris, La Sorbonne, 04-02-1914

[Archives de la Parole]. , Fortune favours the brave : in Bhojpuri of Shahabad (récit, fable) / [Sir George Grierson], éd. ; Linguistic survey of India ; [Hari Sankar Nath], voix

[Traditions. Asie. Inde. Bihar]

Riitta Heinonen 17/1 1968

Kirje 17.1.1968

[Archives de la Parole]. , Khambag (Bengali Song) / William Sinkler Darby, collecteur ; Harry Charan Addy [i.e. Babu Hari Charan Adya], chant ; accompagnement instrumental (harmonium indien, tablâ, flûte)

[Traditions. Asie. Inde]

Diskreetti syrjähyppy kaupunkirakennustaiteeseen : ajatuksia Riitta Nikulan väitöskirjasta

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