PlexBright Compatible Commutators
In experiments requiring optical stimulation of freely behaving animals, optical patch cables attached to the animal may become twisted as the animal moves around. In some cases, during short stimulation sessions, this cable twisting may be tolerated. In other cases where extended free movement of the animal is important, a solution to prevent tangling is required. The PlexBright Commutators below offer a unique solution for preventing the tangling of cables.
The PlexBright Dual LED Commutator is ideal for experiments in which the only tethered cables are as a result of the optogenetic stimulation. It has a light-weight, low-torque, passive design that supports optogenetic experiments requiring one or two LEDs with animals as small as mice. Further, it is equipped with magnetic LED module attachment bases for faster interchangability – often valuable once the commutator has been fixed in place in a small enclosure.
It is ideal for experiments in which optogenetic stimulation is performed simultaneously with neural recording using analog headstages.
Seventeen specialized PlexBright Compact LED Modules have been engineered for use with either commutator that mirror wavelengths available in Plexon’s PlexBright Table-top LED Modules. All PlexBright Commutators support the use of either one or two compact, super-intensity PlexBright LED Modules. When operating two compact modules simultaneously, they may be driven independently or share the same signal, such as for bilateral stimulation via the specialized PlexBright Series-Y BNC cable (pictured attached to the PlexBright Dual LED Commutator with blue, PlexBright Compact LED Modules above).
Historically, an earlier method of delivering light to behaving animals has been to use a laser to transmit light through a rotating set of lenses termed a fiber optic rotary joint (FORJ). The laser/FORJ combination is costly and subject to limitations in channel counts and output stability. Plexon’s commutators, based on our LED platform, are far more cost effective and provide an efficient and superior alternative in which stable, high-intensity light may be delivered with high temporal precision for even the most demanding optogenetic experiments.
PlexBright Starter Kits offer the initial products to get started and a 10% discount when purchased as a kit. Kits are available in four experimental designs and with either driver – the LD-1 Single Channel LED Driver (economical kit), or our more sophisticated device, the 4 Channel Controller with Radiant™ Software (fully functional kit).
If you have further questions, a Plexon Sales Engineer will be happy to help.