Customer requests and feedback have resulted in many new probe designs and customizations that have helped solve various issues in the lab. One issue that researchers have discussed with our engineers is an inability to lower multiple probes at different angles and locations using a microdrive. For some labs, the orientation of the probe connector and the thickness of the headstage prevent probes from being placed close enough together to target the brain regions of interest.

After discussing these types of experimental designs with our customers, two solutions were developed to allow the use of multiple probes in close proximity.

1. Rotated connector
2. Angled reinforcement tube

The image above shows both the standard connector orientation and the rotated connector. Rotating the connector 90 degrees allows for the headstage to be plugged in from the top which can alleviate spacing issues. In addition to the rotated connector, jumpers can be moved so that they are more easily accessible.

Probes can also be made with a “kink” in the reinforcement tube. Customers specify the angle and the location of this bend. Changing the angle of the reinforcement tube can make it easier to plug in the headstage when recording from brain regions close together. The schematic shows examples of probes with bends of various angles.

In some complex experimental designs, it may be useful to combine the rotated connector with a kink in the reinforcement tube. Plexon sales engineers can discuss the best option for your specific experiment. In addition, before purchasing your probes, “dummy” probes can be manufactured without electrode sites so that labs can identify what angle is required and if a rotated connector will be helpful.​ Dummy probes are available for $300 and include the connector of your choice.