Abstract:
:In guinea pig hippocampal slices, 4-aminopyridine (4-AP) in concentrations of 100-500 microM reduced the adaptation of CA3 pyramidal neurons to depolarizing stimuli, resulting in a prolongation of repetitive firing during injection of long-lasting depolarizing currents. Concurrently, there was a decrease in the 'sag' of potential after spike bursts. Furthermore, 4-AP decreased or abolished the hyperpolarizing potential (the afterhyperpolarization) which normally followed repetitive firing of the neurons. The findings suggest that 4-AP could interfere with the Ca2+-activated K+ current in hippocampal CA3 pyramidal neurons.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Matsuda Y,Yoshida S,Fujimura K,Nakamura Mdoi
10.1016/0304-3940(86)90281-8subject
Has Abstractpub_date
1986-04-24 00:00:00pages
316-20issue
3eissn
0304-3940issn
1872-7972pii
0304-3940(86)90281-8journal_volume
65pub_type
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