341. Patil MM and Hasselmo ME. (1999) Modulation of inhibitory synaptic potentials in the piriform cortex. J Neurophysiol 81:2103-18 [Journal] .

NeuronCompartmentPropertyConnectivityNotes
Olfactory cortex anterior interneuron superficial layerAxon terminalCholinergic Receptors.Cholinergic agonist carbachol selectively suppresses intrinsic fiber synaptic potentials but not afferent fiber synaptic potentials. (Hasselmo ME and Bower JM, 1992353 ) (Patil MM and Hasselmo ME, 1999341 ).
Olfactory cortex anterior interneuron deep layerAxon terminalGabaonto pyramidal neuronInhibition of deep neurons (pyramidal and multipolar) by (presumed?) deep layer interneurons involves a fast Chloride and a slow potassium-mediated IPSP (Tseng GF and Haberly LB, 1989350 ). Different GABAergic receptors are localized to specific layers, and may mediate feedforward and feedback inhibitions (Princivalle A et al, 2000349 ). Cholinergic agonist carbachol caused a significant suppression of inhibitory postsynaptic potentials (IPSPs) in the pyramidal neurons that were induced by stimulation of layer Ib, with a weaker effect on IPSPs induced by stimulation of layer Ia (Patil MM and Hasselmo ME, 1999341 ). Dendritic GABAA-mediated IPSPs act largely independent of somatic IPSPs and may regulate facilitation of MNDA-mediated respnses (Kanter ED et al, 1996356 ).
Olfactory cortex anterior interneuron deep layerAxon terminalCholinergic ReceptorsAch action: pre- or postsynaptic?Cholinergic agonist carbachol selectively suppresses intrinsic fiber synaptic potentials but not afferent fiber synaptic potentials. A presynaptic mechanism of cholinergic suppression is suggested (Hasselmo ME and Bower JM, 1992353 ). Cholinergic agonist carbachol caused a significant suppression of inhibitory postsynaptic potentials (IPSPs) in the pyramidal neurons that were induced by stimulation of layer Ib, with a weaker effect on IPSPs induced by stimulation of layer Ia (Patil MM and Hasselmo ME, 1999341 )
Olfactory cortex anterior interneuron deep layerSomaCholinergic ReceptorsAcetylcholine action: pre- or post-synaptic?Cholinergic agonist carbachol caused a significant suppression of inhibitory postsynaptic potentials (IPSPs) in the pyramidal neurons that were induced by stimulation of layer Ib, with a weaker effect on IPSPs induced by stimulation of layer Ia (Patil MM and Hasselmo ME, 1999341 ).

References
353. Hasselmo ME and Bower JM. (1992) Cholinergic suppression specific to intrinsic not afferent fiber synapses in rat piriform (olfactory) cortex. J Neurophysiol 67:1222-9 [Journal] .
341. Patil MM and Hasselmo ME. (1999) Modulation of inhibitory synaptic potentials in the piriform cortex. J Neurophysiol 81:2103-18 [Journal] .
350. Tseng GF and Haberly LB. (1989) Deep neurons in piriform cortex. I. Morphology and synaptically evoked responses including a unique high-amplitude paired shock facilitation. J Neurophysiol 62:369-85.
349. Princivalle A, Spreafico R, Bowery N and De Curtis M. (2000) Layer-specific immunocytochemical localization of GABA(B)R1a and GABA(B)R1b receptors in the rat piriform cortex. Eur J Neurosci 12:1516-20.
356. Kanter ED, Kapur A and Haberly LB. (1996) A dendritic GABAA-mediated IPSP regulates facilitation of NMDA-mediated responses to burst stimulation of afferent fibers in piriform cortex. J Neurosci 16:307-12.
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