g.HEADstage is a 16-channel mini-biosignal amplifier to record neurons and spikes. It can be used for EEG and ECG recordings in animals. The miniaturized boards are extremely small and lightweight and are connected via a very flexible cable to the amplifier. Recordings from g.HEADstage have very little noise and very high input impedance, thereby provides top quality data. The channels have very similar gain, and thus a very high Common Mode Rejection Ratio is obtained.
g.HEADstage is available with system connectors or with single channel connectors to be interfaced to electrodes/wires easily. Furthermore, a g.SPIKEsens power supply and filtering box are connected to the amplifier. One g.SPIKEsens box supports up to 16 channels. Researchers can use multiple g.HEADstages simultaneously. Aggregation boards can be used to interface the amplifier with different electrodes like twisted wires, silicon electrodes and/or multi-electrode arrays.
Importantly, the flexible cable can be disconnected from the g.HEADstage. This allows you to replace the cable if it is destroyed by an animal or any other cause. The g.HEADstage is offered in two different types: 16 channels with multi-pin connector or 16 channels with golden-pin connector.
|Extremely small board|
|Aggregation boards help interface different electrodes types|
|High quality neuronal activity recordings|
|LED slot to support easier video tracking|
|Very high signal-to-noise ratio|
|Size||23 x 23 mm|
|Input channels||16 monopolar|
|Filter||0.5 – 6000 Hz|
|Safety class||Internally powered|
RECORDING OF PLACE CELLS IN RATS
In-vivo recordings of action potentials (spikes) in rats can be done by using the g.HEADstage or g.USBamp. For example, real-time reconstructions of movement trajectories of rats can be measured while they are foraging for food in an arena. The rat’s path is investigated with a video that transmits the x- and y- positions to a recording computer. Simultaneously, the neuronal activity is recorded with tetrodes (electrodes consisting of 4 wires) placed in the CA1 region of the hippocampus. These neurons increase their firing activity only when the animal is at a specific location in its environment and a field. By recording from many place and grid cells, the rat’s position in the arena can be decoded with g.tec’s BCI technology.