FAQ

 

Product Support

  • Standard Probes

    • Disabling the internal refernce on a chronic probe

      Some 32 and 64 channel probe designs have an internal reference site on the silicon substrate. To disable this site and use an external reference, the wire loop jumper on the front of the probe's PCB should be cut. This will sever the connection between the reference site and the reference pin within the connector, allowing you to use one of the remaining wires on the probe as the external reference.

    • Which site area should I use for my experiment?

      We recommend using probes with a site area of 177 µm2 or less for single unit activity and for LFP recordings. For multi-unit recordings or stimulation experiments, larger site areas are recommended.

    • Can I coat my probe with a dye to mark my insertion track?

      Yes, DiI is compatible with our probes and is commonly used for this purpose. The probe can be dipped or dye can be painted on the back of the probe. After the probe has been retracted, dye can be removed using our standard probe cleaning protocol.

    • How can I ground and reference acute A16, A32, or A64 probes?

      Acute probes do not come assembled with ground and reference wires, but these can be installed after probes have been delivered. A32 and A64 probes have ground and reference vias adjacent to the top connectors on the PCB where pins or wires may be soldered. A16 probes do not have these, however, so ground and reference wires must be attached at the headstage or preamplifier.

    • Disabling the internal refrence on acute 32-channel probes

      If your 32-channel probe design has an internal reference site on the shank and you wish to disable it, you can do so easily. On the front of the probe (with the black SAMTEC connector facing away), there will be an exposed gold trace above the second row of pins. Severing this connection will break the link between the internal reference site and the reference pins in the connector. This modification cannot be undone, so only do so if you have no intention of using this reference. To use an external reference, a wire may be attached to the nearby solder hole labeled R.

    • What is the relationship between electrode site size and impedance?

      NeuroNexus has provided an explanation in the technical notes at this link.

    • What is the proper method for cleaning probes?

      Refer to the technical notes at this link for the NeuroNexus cleaning protocol.

    • Does NeuroNexus offer other electrode site materials?

      NeuroNexus penetrating probe electrode sites are pure iridium by default. Platinum and gold sites are available as a custom option. Please contact us for details.

  • Surface Probes

    • What is the difference between your ECoG and EEG probes?

      ECoG and EEG probes are made by the same process and use the same materials. They only differ by feature sizes, with EEG electrode sites being much larger.

  • Microdrive Support

    • Which dDrive should I choose?

      NeuroNexus's dDrives are typically used for recordings in rodents. The dDrive-nano and dDrive-m are suitable for both mice and rats, however we recommend that the dDrive-XL only be used with rats due to their increased weight.

    • How deep can I record using a dDrive?

      Probes mounted on dDrives can only record as deep as the probe would reach if it were used without a drive. For instance, if you are trying to record from a target area 8 mm below the surface of the brain, a good probe and drive combination would be a 10 mm length probe mounted on a dDrive-m (2.5 mm drive range). This would allow the 10 mm probe to reach effective depths of 7.5 mm to 10 mm.


Billing & Shipping

  • Can NeuroNexus ship to me using FedEx?

    By default, NeuroNexus uses UPS as our main shipping service for domestic and international orders. If your institution has a UPS or FedEx shipping account and you wish to use it, please provide this to us when placing an order. All shipping related costs will be applied to this account (including any VAT, duties and taxes for international orders), with the exception of a $15 handling fee. For questions about this, please contact us for details.

  • Invoices

    NeuroNexus uses NET-30 terms when accepting payment by purchase order, and we will send the invoice within 30 days of the completed order being shipped. If you require the invoice sooner, please contact us for details.

  • Product damaged or non-functional upon delivery

    Occasionally, some devices may, unfortunately, be damaged in transit. It is the end user's responsibility to inspect all orders and notify NeuroNexus of damaged items within 7 days of delivery.


Sales & Ordering

  • Ordering for the first time

    If this is the first time your lab has requested a quote or ordered from NeuroNexus, please fill out the information form at this link. This will help us ensure that quotes and orders are properly tracked.