NEW Dynamic Plantar Aesthesiometer (DPA) for mechanical stimulation
Code: 37550

NEW Dynamic Plantar Aesthesiometer (DPA) for mechanical stimulation Featured

The only automated device for touch sensitivity detection

The Dynamic Plantar Aesthesiometer was designed to automate the assessment of “touch sensitivity” on the plantar surface of rats or mice and comes ready with all necessary accessories to work with both Mice and Rats.  It is known by some as the Electronic Von Frey or Plantar Von Frey instrument.  

At each paw withdrawal, the Dynamic Plantar Aesthesiometer (DPA) automatically detects and records latency time, and actual force at the time of paw withdrawal reflex. A movable force actuator is positioned below the plantar surface of the animal and the desired force and force speed (ramp) is applied, as preset by the operator. A Von Frey–type 0.5mm rigid filament exerts increasing force, until the animal twitches its paw.  

The DPA encompasses:
  • a movable touch-stimulator unit, well proven in previous model, complete with filament actuator and adjustable angled-mirror
  • a microprocessor controlled electronic unit, of new design provided with graphic display, internal memory for data storage, USB key and optional printer
  • a large testing surface (perforated metal platform)
  • a new modular animal enclosure, offering from 3 to 12 spaces, convenient to hold rats and mice

Data may be easily ported to the memory stick or directly to computer.

The Ugo Basile Dynamic Plantar Aesthesiometer 37550 is the quickest and most accurate way of delivering a mechanical stimulation and measuring a response, all automatically!


- Maximum Force is 100g (formerly 50g)

- Touching force and touching pause is adjustable (to control the stimulus approaching phase)

- Paw withdrawal detection is automatic, but can also be manually detected, depending on the experimenter preference

- TTL I/O for trigger input and output

- Embedded hard disk so that the USB key is used for data export/import only

Additional Info

    The force is automatically applied Consistency in force application, rate and direction
    Maximum force is 100g Works on a broader range of animal models, molecules, diseases
    The user only has to press a button The test is quicker and less tedious than VF hairs
    Double click of the button triggers manual score Possibility to use manual scoring when animal behaviour is difficult to automatically detect
    Force threshold and ramp can be adjusted More parameters to fit with virtually any experimental need
    Touch force and touch pause can be adjusted The way the probe approaches the paw can be changed, depending on paw sensitivity
     Force automated or manual The force threshold can be scored manually or automatically 
    Readout and commands Via 4.3" color touch screen
    TTL/IO input and output TTL signal
    Power Requirements Universal input 100-240 VAC, 50-60 Hz, 30W
    Start experiment via push buttons on the touch unit, icon on the touch screen, or TTL input  
    Stop experiment via push buttons on the touch unit, icon on the touch screen, cut-off, or TTL input  
    Force Range 0.3 to 100 grams, in 0.1g steps
    Force Increasing Rate (ramp) adjustable in the interval 0 to 50 seconds, in 1 s steps
    Latency Time displayed on the graphic display, in 0.1s steps
    Data Portability to PC Via USB pen drive provided, as csv format export file
    Calibration via calibration weights provided
    Operating Temperature 10° to 40° C
    Sound Level <45dB
    Total Weight 10Kg
    Shipping Weight 13Kg approx.
    Dimensions 135 (w) x 40 (d) x 50 (h) cm (required space on table; all parts)
    Packing Dimensions 98x49x47cm
    Warranty Dynamic Plantar Aesthesiometer is covered by a 24-month warranty.

    Impaired cutaneous sensation is usually first manifested in a loss of light touch detection. So “mechanical” stimulation has a long history of effective clinical use to diagnose pa-thologies of hyper- or hypo-aesthesia, brought about by drugs, neural pathology or experimental lesions, etc.

    The Dynamic Plantar Aesthesiometer was developed to apply a reproducible light touch to the rodent plantar surface, and quantify the force which causes the animal to react by withdrawing the paw.

    37550-001 Microprocessor controlled electronic unit
    37550-002 Touch Stimulator, complete with probe actuator and adjustable angled-mirror
    37000-003 Large Platform
    37400-327 Supporting column (4)
    37000-006 Modular Animal Enclosure, with lids and spacers (No. 3 Modules M-S 085)
    37450-005 Large Framed Perforated Metal Sheet

    Plastic Case lodging

    2 Filaments (with umbrella), 2 Calibration Weights, 1 hex. Wrench 1.25

    E-AU 041 Memory Key, including the user manual and Xpad software

    Spare parts

    37400-330 Spare filament, with protection umbrella
    M-S 085 Replacement Cage Module


    37450-278 Additional Stimulation Base, complete with perforated metal sheet and animal enclosure
    37100 Set of 2 Durham Holders for Orofacial Stimulation (see paragraph 5.5)

Related items by application