Example Recordings from SCTs


Here are recordings made with our subcutaneous transmitters. The NDF files are compressed as zip archives. You can download these and play them yourself with the Neuroarchiver, which is free for download as part of our LWDAQ Software.

Seizure Spreading: Presentation of rat EEG following injection of tetanus toxin in the visual cortex, recorded by an A3028A-CC two-channel SCT with one electrode in motor cortex, one in visual cortex, one in cerabellum. (ION/UCL)

Mouse_Tetanustoxin_1: Mouse EEG following injection of tetanus toxin in the visual cortex, recorded by an A3019A with screw electrodes. Shows bursts of high frequency power in the mouse motor cortex and secondary generalised seizure. One electrode is in the visual cortex, the other in the motor cortex. (ION/UCL)

Mouse_Pilocarpine_1: Mouse EEG following injection of pilocarpine into the visual cortex, recorded by an A3019A with screw electrodes. Shows evolution of epileptiform activity following pilocarpine injection into the visual cortex. (ION/UCL)

M1279645346.ndf Two minutes of heartbeat and respiration from a rat, recorded by an A3019D with two bare-wire electrodes in the chest cavity. In a sixteen-second interval we see the respiration rhythm as well as the heartbeat spikes. The spectrum shows a peak at 1 Hz is the fundamental frequency of respiration. The decreasing peaks at 2, 3, 4, 5, and 6 Hz are its harmonics. The peak at 7 Hz is the fundamental of the heartbeat. In a two-second interval we see the 7-Hz heartbeat clearly, and its harmonics at 14, 21, 28, and 35 Hz. (CHB/Harvard)

ECP3 Demonstration: Load a working library, look through some real data, and apply the Batch Classifier. The package contains four hours of single-channel EEG recorded from two animals by Iris Oren at Edinburgh University with two A3028A-CC transmitters. Channel No1 is a wild mouse. Channel No3 is an Alzheimer's disease transgenic mouse. Along with the recordings are the ECP3 classification processor script, an ECP3 event library, four characteristics files obtained from the recordings with the ECP3 processor, and a list of all events discovered in the recordings with the Batch Classifier. In the metadata of the archives are stored the baseline power calibration of each channel, under the name "ECP3". When we follow the instructions below, use channel No3. The first six candidate events are at 309 s, 579.0 s, 587.0 s, 588.0 s, 666.0 s, of which the first is a spike burst, the last is the beginning of a delta wave that cannot be classified reliably with one-second intervals, and the middle for are uninteresting. (43 MBytes, Edinburgh University recordings)

ECP11 Demonstration: Event classification processor ECP11 applied to ten hours of recordings from rats. (370 MBytes, ION/UCL recordings).

ECP19 Demonstration: Event classification processor ECP19 applied to thirty-seven hours of recordings from mice and rats. (730 MByte, ION/UCL, Edinburgh, Oxford, and CHB recording).

M1300920651.ndf: One hour of EEG from several rats after injection of tetanus toxin, recorded by an A3019D with screw electrodes. The characteristics file produced by ECP1.tcl from this recording is M1300920651_ECP1.txt. (ION/UCL)

M1300924251.ndf: One hour of EEG from several rats after injection of tetanus toxin, recorded by A3019D transmitters with screw electrodes. The characteristics file produced by ECP1.tcl from this recording is M1300924251_ECP1.txt. (ION/UCL)

Rat Classifier_Example: Sixteen separate hours of EEG recorded from a few dozen rats with A3019D transmitters one screw and one bare-wire electrode. Includes event classification processor ECP11V3 and Event Library. (ION/UCL)

M1445359478.ndf: One hour of EEG from two mice with skull screw electrodes. There are inter-ictal spikes in No5 throughout, and large movement artifacts to confound spike-finding algorithms. (Edinburgh University)

M1436545502.ndf: One hour of EEG from one mice showing movement artifact and short inter-ictal spikes of up to 1 mV. (Edinburgh University)