A modification of the Harper-McGinty microdrive for use in chronically prepared rabbits.

We describe a modification of the Harper-McGinty microdrive for use with extracellular, microwire recording in conscious, chronically prepared rabbits. Improvements over existing designs are in ease of assembly and mechanical stability. The microdrive is easily fabricated with hand tools and readily available parts.

Neuronal activity within the ventrolateral periaqueductal gray during simulated hemorrhage in conscious rabbits.

The ventrolateral (vl) periaqueductal gray (PAG) has been proposed as a site responsible for the active process triggering the onset of hypotension (i.e., phase 2) during blood loss in conscious animals (Cavun S and Millington WR.