Abstract:
:Reverberating spontaneous synchronized brain activity is believed to play an important role in neural information processing. Whether and how external stimuli can influence this spontaneous activity is poorly understood. Because periodic synchronized network activity is also prominent in in vitro neuronal cultures, we used cortical cultures grown on multielectrode arrays to examine how spontaneous activity is affected by external stimuli. Spontaneous network activity before and after low-frequency electrical stimulation was quantified in several ways. Our results show that the initially stable pattern of stereotypical spontaneous activity was transformed into another activity pattern that remained stable for at least 1 h. The transformations consisted of changes in single site and culture-wide network activity as well as in the spatiotemporal dynamics of network bursting. We show for the first time that low-frequency electrical stimulation can induce long-lasting alterations in spontaneous activity of cortical neuronal networks. We discuss whether the observed transformations in network activity could represent a switch in attractor state.
journal_name
Biophys Jjournal_title
Biophysical journalauthors
Vajda I,van Pelt J,Wolters P,Chiappalone M,Martinoia S,van Someren E,van Ooyen Adoi
10.1529/biophysj.107.112730subject
Has Abstractpub_date
2008-06-01 00:00:00pages
5028-39issue
12eissn
0006-3495issn
1542-0086pii
S0006-3495(08)70366-7journal_volume
94pub_type
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