Plexon V-Probe

The V-Probe* tip is most useful for recording from deep structures. The tip to first electrode site spacing is the shortest with a V-Probe tip. This tip should cause the minimum amount of tissue trauma during implantation.

The V-Probe is a multi-use, multi-site, linear electrode with recording sites positioned on the side of a sharpened, symmetric cone. Compared with our very popular U-Probe, the cone-shaped tip is believed to result in less trauma to the brain tissue upon penetration by minimally displacing tissue along the track. The new design also permits an electrode site to be placed closer to the tip of the probe.

V-Probes are made in a single-row configuration, with a choice of 8, 16, 24 or 32 channels, in lengths up to 150mm.


The platinum/iridium electrode recording sites are available in 15, 20, 25 and 40µm diameter options. The small electrode site diameter (15µm) enables effective single-unit recording, while a unique etching process of the electrode surface results in lowered impedances without significantly changing the overall surface area of the exposed recording site. The result is a small site suitable for resolving single units coupled with low impedance for a better single-to-noise ratio.

V-Probes also come with the flexibility of integrating up to four fluid channels or optical fibers at specified locations – sites 1-4 illustrated in the 8 channel configuration below. Please see the Technical Spec tab for more information on correct placement.


Like U-Probes, V-Probes are exceptionally robust due in part to their hand-crafted, stainless steel construction (as opposed to silicon), and ability to penetrate deep within the brain. When used according to proper procedures, V-Probes will support many uses over a long period of time. Reusing the exact V-Probe from experiment to experiment is not only economical, but more importantly removes one element of potential variability.

You may also wish to explore other options in Plexon’s family of Specialty Probes, Electrodes and Arrays including our Thumbtack Probe for chronic application with medium to large animals.