Abstract：
:We have recently reported that the burst firing neurons are found in layer III as well as in layer V of cat sensorimotor cortex in vitro. In the present study, we examined the synaptic excitability of layer III neurons by white matter stimulation and compared with their firing patterns against the current injections through the recording microelectrodes. The firing patterns of layer III neurons were classified into three main classes as in our previous study, i.e., (1) regular spiking (RS), i.e., the tonic firing that often exhibited spike-frequency adaptation, (2) burst-and-single spiking (BS), i.e., the initial bursting followed by tonic firing, (3) repetitive-bursting (RB), the burst firing that recurred at fast frequency. In RS cells, single action potential was superimposed on the largest EPSPs among all cell types analyzed. BS cells also fired single action potential and never exhibited burst firing synaptically. Only in a part of RB cells, synaptic bursting instead of single action potential was evoked on smaller EPSPs. IPSPs could be observed in about 60% of all the recorded RS and BS cells, however, they were observed in only 10% of the RB cells.
journal_name
Brain Resjournal_title
Brain researchauthors
Kitagawa H,Nishimura Y,Yamamoto Tdoi
10.1016/s0006-8993(99)01850-8subject
Has Abstractpub_date
1999-09-18 00:00:00pages
101-8issue
1eissn
0006-8993issn
1872-6240pii
S0006-8993(99)01850-8journal_volume
842pub_type
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