This meter measures a rat's reaction time to radiant energy from a 150 watt ight source. The beam is
focused on its tall usinga parabolIc reflector. The energy of the light source can beadjusted and the
display indicates, as a percentage, how muchenergy is being utilized
For rapid screening of analgesic drugs usingrats (as described by D'Amour and Smith)
An opticalsensor is located underneath the focused ight source. The ratshould be positioned such that
its tail obscures the focused lightsource from the sensor. When the system is started, either usingth
supplied footswitch or front pane! mounted start key the lightsource illuminates and a timer starts
counting in tenths of asecond. When the rat's tail flicks, indicating its pain threshold, it uncovers the
sensor. This tail movement turns off the timer andlight source. Reaction time can be read directly from
the displayin seconds and tenths of a second
A standard parallel port permits connection to a printer to recordthe trial number, energy level and
reaction time. A calibrationfacility allows the light source to be set to the desired leve before commencing
with the experiment
甩尾测痛仪,harvard Tail Flick Analgesia Meters
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