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Institut für Physiologie und Pathophysiologie

Arbeitsgebiete

Fast Network Oscillations


Rhythmic activity is a key functional feature of the brain, as evident from the well-known EEG-rhythms. Meanwhile, many neuroscientists agree that such network oscillations are «meaningful» and provide an important background for temporal coding of information. In our group we focus on one type of network oscillations in the rodent hippocampus, namely «ripples» at ~200 Hz as originally described by John O´Keefe, G. Buszáki and others. We want to elucidate the precise mechanisms by which neurons are entrained to fire at high precision within these short (5 ms) cycles. Moreover, we would like to find out why certain neurons participate in this network while others do not.

Function of GABAergic Synapses

The complex organisation of central synapses offers multiple mechanisms for regulation and modulation of synaptic strength. We focus on inhibitory synapses in the mammalian CNS which use GABA (gamma-aminobutyric acid) as transmitter. The availability of GABA is regulated by its synthesis, degradation and after release-uptake. In situations of over-excitability, the GABA-synthetizing enzyme GAD is up-regulated while a decrease of neuronal activity leads to a down-regulation of GAD. Thus, cellular GABA content seems to be an activity-dependent, variable parameter. We propose that the presynaptic GABA metabolism is a true and autonomous mechanism of synaptic plasticity. We are presently testing this hypothesis using various electrophysiological, histological and biochemical techniques.

Synaptic Physiology and Pharmacology of Epilepsy


Neue Publikationen

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AAV-mediated AP-1 decoy oligonucleotide expression inhibits aortic elastolysis in a mouse model of marfan syndrome. Cardiovasc Res. 2021 Jan 20:cvab012. doi: 10.1093/cvr/cvab012. Online ahead of print.

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Voltage-independent GluN2A-type NMDA receptor Ca2+ signaling promotes audiogenic seizures, attentional and cognitive deficits in mice. Commun Biol. 2021 Jan 8;4(1):59. doi: 10.1038/s42003-020-01538-4.

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Endothelial cells control vascular smooth muscle cell cholesterol levels by regulating 24-dehydrocholesterol reductase expression. Exp Cell Res. 2021 Jan 7:112446. doi: 10.1016/j.yexcr.2020.112446. Online ahead of print.

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Assessable learning outcomes for the EU Education and Training Framework core and Function A specific modules: Report of an ETPLAS WORKING Group. Lab Anim. 2020 Dec 7:23677220968589. doi: 10.1177/0023677220968589. Online ahead of print.

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Pflügers Archiv - European journal of physiology becomes the official journal of the German Physiological Society. 2020 Dec;472(12):1657. doi: 10.1007/s00424-020-02493-z. Editorial. No abstract available.

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Mild metabolic stress is sufficient to disturb the formation of pyramidal cell ensembles during gamma oscillations. J Cereb Blood Flow Metab. 2020 Dec;40(12):2401-2415. doi: 10.1177/0271678X19892657. Epub 2019 Dec 16.

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Gene transfer to the vascular system: Novel translational perspectives for vascular diseases. Biochem Pharmacol. 2020 Dec;182:114265. doi: 10.1016/j.bcp.2020.114265. Epub 2020 Oct 6. Review.

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Alterations of distributed neuronal network oscillations during acute pain in freely-moving mice. IBRO Rep. 2020 Dec;9:195-206. doi: 10.1016/j.ibror.2020.08.001. eCollection 2020 Dec. Epub 2020 Aug 11.

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A thalamic bridge from sensory perception to cognition. Neurosci Biobehav Rev. 2020 Nov 24:S0149-7634(20)30647-3. doi: 10.1016/j.neubiorev.2020.11.013. Review. Online ahead of print.

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Debunking a myth: plant consciousness. Protoplasma. 2020 Nov 16. doi: 10.1007/s00709-020-01579-w. Review. Online ahead of print.

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VEGF-D Downregulation in CA1 Pyramidal Neurons Exerts Asymmetric Changes of Dendritic Morphology without Correlated Electrophysiological Alterations. Neuroscience. 2020 Nov 10;448:28-42. doi: 10.1016/j.neuroscience.2020.09.012. Epub 2020 Sep 11.

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The mitochondrial calcium uniporter is crucial for the generation of fast cortical network rhythms. J Cereb Blood Flow Metab. 2020 Nov;40(11):2225-2239. doi: 10.1177/0271678X19887777. Epub 2019 Nov 13.

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Processing of hippocampal network activity in the receiver network of the medial entorhinal cortex layer V. J Neurosci. 2020 Oct 28;40(44):8413-8425. doi: 10.1523/JNEUROSCI.0586-20.2020. Epub 2020 Sep 25.

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Anesthetics and plants: no pain, no brain, and therefore no consciousness. Protoplasma. 2020 Sep 2. doi: 10.1007/s00709-020-01550-9. Online ahead of print.

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Microglia and lipids: how metabolism controls brain innate immunity. Semin Cell Dev Biol. 2020 Aug 14;S1084-9521(19)30197-1. doi: 10.1016/j.semcdb.2020.08.001. Online ahead of print.


Institut für
Physiologie und Pathophysiologie

Universität Heidelberg

Im Neuenheimer Feld 326

69120 Heidelberg

Telefon:+49 6221 54-4056
Telefax:+49 6221 54-6364
E-Mail:susanne.bechtel@
physiologie.uni-heidelberg.de