Modeling Depolarization Induced Suppression of Inhibition in Pyramidal Neurons

نویسندگان

  • Peter Osseward
  • Uri Magaram
چکیده

Depolarization-Induced Suppression of Inhibition (DSI) is effectively a mechanism for feedback-inhibition of inhibition. Wilson and Nicoll [4] showed that its effect is mediated through a retrograde endocannabinoid signal. Here, we produced a simple model for DSI which matched the effects and kinetics of DSI found in empirical data. We then explored a possible function for DSI through examining its effects on shaping orientation tuning curves. DSI demonstrated a dramatic effect on the shape of the tuning curve, indicating that it may play a similar role in-vivo.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Endocannabinoids Mediate Rapid Retrograde Signaling At Interneuron 3 Pyramidal Neuron Synapses of the Neocortex

Trettel, Joseph and Eric S. Levine. Endocannabinoids mediate rapid retrograde signaling at interneuron 3 pyramidal neuron synapses of the neocortex. J Neurophysiol 89: 2334–2338, 2003; 10.1152/jn.01037.2002. In the neocortex, inhibitory interneurons tightly regulate the firing patterns and integrative properties of pyramidal neurons (PNs). The endocannabinoid system of the neocortex may play an...

متن کامل

(S)- 3,5-Dihydroxyphenylglycine )an agonist for group I metabotropic glutamate receptors( induced synaptic potentiation at excitatory synapses on fast spiking GABAergic cells in visual cortex

Introduction: (S)- 3,5-Dihydroxyphenylglycine (DHPG) is an agonist for group I metabotropic glutamate receptors. DHPG-induced synaptic depression of excitatory synapses on hippocampal pyramidal neurons is well known model for synaptic plasticity studies. The aim of the present study was to examine the effects of DHPG superfusion on excitatory synapses on pyramidal and fast-spiking GABAergic cel...

متن کامل

Brief trains of action potentials enhance pyramidal neuron excitability via endocannabinoid-mediated suppression of inhibition.

Depolarization-induced suppression of inhibition (DSI) is a form of retrograde signaling at GABAergic synapses that is initiated by the calcium- and depolarization-dependent release of endocannabinoids from postsynaptic neurons. In the neocortex, pyramidal neurons (PNs) appear to use DSI as a mechanism for regulating somatic inhibition from a subpopulation of GABAergic inputs that express the t...

متن کامل

Endocannabinoid- and mGluR5-dependent Short-Term Synaptic Depression in an Isolated Neuron/Bouton Preparation from the Hippocampal CA1 Region Running title: Endocannabinoid- and mGluR5-dependent STD

Endocannabinoids released from the postsynaptic neuronal membrane can activate presynaptic CB1 receptors and inhibit neurotransmitter release. In hippocampal slices, depolarization of the CA1 pyramidal neurons elicits an endocannabinoid-mediated inhibition of GABA release known as depolarization-induced suppression of inhibition (DSI). Utilizing the highly reduced neuron/synaptic bouton prepara...

متن کامل

Time course of dysregulation of calcium homeostasis in acutely isolated CA1 hippocampal pyramidal neurons after pilocarpine-induced Status Epilepticus

Glutamate induces excitotoxic damage to hippocampal pyramidal neurons in Status Epilepticus (SE) and epilepsy. In this study, we investigated time course of dysregulation of calcium homeostasis at various intervals after an episode of SE in acutely isolated CA1hippocampal pyramidal. For this purpose, male Sprague-Dawley rats (200 g) were subjected to pilocarpine-induced SE. The SE was blocked a...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014