Actions of Somatostatin on Rat Neocortical Neurons in vitro
Version of Record online: 7 APR 2006
European Journal of Neuroscience
Volume 1, Issue 5, pages 489–493, September 1989
How to Cite
Vidal, C. and Zieglgänsberger, W. (1989), Actions of Somatostatin on Rat Neocortical Neurons in vitro. European Journal of Neuroscience, 1: 489–493. doi: 10.1111/j.1460-9568.1989.tb00355.x
- Issue online: 7 APR 2006
- Version of Record online: 7 APR 2006
- Received 13 December 1988, revised 4 April 1989, accepted 26 April 1989
- intracellular recording;
- γ-aminobutyric acid;
The effects of somatostatin (SS14) on neocortical neurons of the rat were investigated in an in vitro slice preparation. Intracellular recordings were performed in neurons (n=30) in layers 2 and 3 of the frontal cortex.
Iontophoretically applied SS14 reduced the responses evoked by iontophoretically applied L-glutamate (GLU) and γ-aminobutyric acid (GABA). The blocking effect of SS14 was apparent 1–2 min after onset of SS14 application and recovery required 2–3 min. The conductance increase evoked by GLU or GABA was reduced by SS14. In the majority of neurons, SS14 did not produce any measurable changes in passive membrane properties, spike threshold or on orthodromically evoked synaptic potentials. In 5 cells, SS14 induced a slight hyperpolarization (<3 mV).
These results lend further support to claims that SS14 plays a neuromodulatory role in the neocortex.