Chemogenetic technology designer receptors exclusively activated by designer drugs (DREADD) is a widely used experimental method to control neuronal activity with an exogenous receptor. This study virally expressed an excitatory DREADD in all inhibitory interneuron types of the CA1 region of the hippocampus in the rat. For this study, Sprague Dawley rats were used for viral injection and intracranial...

Several spatial coding mechanisms are known to coexist in the hippocampus. However, how are they influenced by various environmental features is still unclear. This study investigated the spatial coding characteristics of hippocampal neurons in mice and rats navigating in different environments. C57BL/6 mice and Long-Evans rats were used in this study. For both mice and rats, most CA1 cells were recorded...

Place cells receive a disparate collection of excitatory and inhibitory currents that provide them with spatially selective discharges and rhythmic activity. This study combined intracellular and extracellular recordings with computational modeling and optogenetic or chemogenetic manipulations to examine the influence of inhibitory and excitatory inputs on CA1 pyramidal cell responses. Homozygous CaMKIIa-Cre...

This study described a unique set of deep layer neurons in posterior parietal cortex (PPC) whose spiking activity is inversely correlated with all principal cells and interneurons in all brain states, but most commonly during the down state of non-REM (NREM) sleep. They identified down state-active (DSA) neurons as deep layer neocortical neurogliaform cells that express ID2 and Nkx2.1. For this study,...

Spike sequences are exemplified by memory replays in sharp-wave ripples (SWRs) and high-frequency oscillations resulting from pyramidal cell-interneuron interactions in the hippocampus. However, the microcircuitry mechanism that enables such flexible spike sequencing remains unknown. This study recorded the membrane potentials of multiple hippocampal CA1 pyramidal cells in mice. For this study, whole-cell...

This dataset includes 3D scanning electron microscopy (SEM) images of a female mouse corpus callosum and MATLAB code for random walker (RaW) segmentations of myelinated axons. The code additionally characterizes inner axonal diameters and fiber orientation dispersion within segments of the intra-axonal spaces and myelin sheaths. In the study, a female 8-week-old C57BL/6 mouse was perfused trans-cardiacally...

The investigators collected simultaneous recordings using multi-channel electrode arrays attached to the prearcuate gyrus of macaque monkeys who performed a direction discrimination task with fixed stimulus duration. In the study, 96-channel multielectrode arrays were used to record from neural populations in area 8Ar of the prearcuate gyrus of three macaque monkeys, while they performed a direction...

The dataset contains data collected from twelve Balb/c mice with metastatic breast cancer (4T1 mammary tumors). Six mice were in the control group and six mice were treated with 5-Fluorouracil (5FU) for metronomic chemotherapy for two weeks. Diffusion MRI (dMRI) and Dynamic Contrast-enhanced MRI (DCE-MRI) images were collected at baseline and post-treatment. Immunohistochemically (IHC) stains and measurements...

Electrophysiological recordings were obtained from male rats who were subjected to localized cooling of their medial septum (MS) prior to completing behavioral tasks. The MS is critical in theta generation. Therefore, temperature manipulation of the MS was used to test these models. Approximately 40 control trials were completed, followed by exposure to dry ice to reduce MS temperature for 20 to 60...

The Buzsáki Lab has shared designs for a 3D-printed metal microdrive and head cap system for freely-moving rodents and sample electrophysiological recordings. The modular design allows for recovery and reuse of silicon probes in multiple experiments with mice and Long-Evans rats. The .step files for the metal microdrive are optimized for stainless steel 316L in 20 micrometer resolution and aluminum...