PMID- 32153363 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220129 IS - 1662-4548 (Print) IS - 1662-453X (Electronic) IS - 1662-453X (Linking) VI - 14 DP - 2020 TI - Simultaneous Electrophysiology and Fiber Photometry in Freely Behaving Mice. PG - 148 LID - 10.3389/fnins.2020.00148 [doi] LID - 148 AB - In vivo electrophysiology is the gold standard technique used to investigate sub-second neural dynamics in freely behaving animals. However, monitoring cell-type-specific population activity is not a trivial task. Over the last decade, fiber photometry based on genetically encoded calcium indicators (GECIs) has been widely adopted as a versatile tool to monitor cell-type-specific population activity in vivo. However, this approach suffers from low temporal resolution. Here, we combine these two approaches to monitor both sub-second field potentials and cell-type-specific population activity in freely behaving mice. By developing an economical custom-made system and constructing a hybrid implant of an electrode and a fiber optic cannula, we simultaneously monitor artifact-free mesopontine field potentials and calcium transients in cholinergic neurons across the sleep-wake cycle. We find that mesopontine cholinergic activity co-occurs with sub-second pontine waves, called P-waves, during rapid eye movement sleep. Given the simplicity of our approach, simultaneous electrophysiological recording and cell-type-specific imaging provides a novel and valuable tool for interrogating state-dependent neural circuit dynamics in vivo. CI - Copyright (c) 2020 Patel, McAlinden, Mathieson and Sakata. FAU - Patel, Amisha A AU - Patel AA AD - Strathclyde Institute of Pharmacy & Biomedical Sciences, University of Strathclyde, Glasgow, United Kingdom. FAU - McAlinden, Niall AU - McAlinden N AD - Department of Physics, Institute of Photonics, SUPA, University of Strathclyde, Glasgow, United Kingdom. FAU - Mathieson, Keith AU - Mathieson K AD - Department of Physics, Institute of Photonics, SUPA, University of Strathclyde, Glasgow, United Kingdom. FAU - Sakata, Shuzo AU - Sakata S AD - Strathclyde Institute of Pharmacy & Biomedical Sciences, University of Strathclyde, Glasgow, United Kingdom. LA - eng GR - S45/ACT_/RNID/United Kingdom PT - Journal Article DEP - 20200221 PL - Switzerland TA - Front Neurosci JT - Frontiers in neuroscience JID - 101478481 PMC - PMC7047771 OTO - NOTNLM OT - GCaMP OT - REM sleep OT - acetylcholine OT - brain state OT - brainstem OT - pontine waves EDAT- 2020/03/11 06:00 MHDA- 2020/03/11 06:01 PMCR- 2020/01/01 CRDT- 2020/03/11 06:00 PHST- 2019/10/16 00:00 [received] PHST- 2020/02/07 00:00 [accepted] PHST- 2020/03/11 06:00 [entrez] PHST- 2020/03/11 06:00 [pubmed] PHST- 2020/03/11 06:01 [medline] PHST- 2020/01/01 00:00 [pmc-release] AID - 10.3389/fnins.2020.00148 [doi] PST - epublish SO - Front Neurosci. 2020 Feb 21;14:148. doi: 10.3389/fnins.2020.00148. eCollection 2020.