ACTIVITY MONITOR - Vanderbilt Kennedy Center

MED ASSOCIATES INC. ACTIVITY MONITOR
Measure
(pre-analysis)
Dist. Trav. (Cm or In -
User-definable)
Table A2.1 - Summary Data
- 61 -
Definition
(Data are presented in block intervals and session totals)
Distance traveled outside the Box. The combination of Box Size and Resting Delay
create a threshold through which a subject must move a given distance (Box Size) in a
defined period of time (Resting Delay) to maintain ambulatory movement status.
Time Amb. (Sec) Time in ambulatory movement status. The time and distance (above) are used to
determine velocity.
Amb. Cnts. The number of beam breaks (counts) while in ambulatory movement status. The
difference between counts and distance is precision. Distance data reflect differences in
angular movements as discrete and counts data are angle independent.
Time Ster. (Sec) Time spent breaking beams inside the Box.
Ster. Cnts. Total number of beam breaks inside the Box. When the animal leaves the Box, it is
considered an Ambulatory Episode and beam breaks are no longer counted as
Stereotypic. When the animal then stops for an amount of time equal to the resting
delay, a new Box based around the animals current position is established and beam
breaks are once again counted as Stereotypic.
Time Rest. (Sec) Time spent with no new beam breaks.
Vert. Cnts. Number of periods of continuous beam breaks reported by the "Z" I/R Array strips.
Vert. Time (Sec) Total time breaking "Z" beams.
Session Time Total session time
Jump Counts If a subject jumps and leaves the photo-beam array for a period of time, the software
records 0,0’s for that period of time. The number of continuous 0,0 records will be
counted. If the "X" & "Y" I/R Array strips have not been well centered on the subject,
there may be error in this data (Chapter 1).
Jump Time (Sec.) Time spent with 0,0 coordinates, which indicate a jump, under the beams or standing
against the wall with all photo-beams passing through their legs. Use care when
adjusting the photo-beam array heights.
Average Velocity
(Cm/Sec or In/Sec)
The average velocity for each data block and total for the session. This measure may be
very useful for establishing criteria by which Box Size and Resting Delay times may be
set to establish meaningful Ambulatory settings for various screening protocols. See
Appendix IV for additional information.
Ambulatory Episodes The number of times that the subject leaves the Box and travels the user-defined
ambulatory trigger number of beams before the resting delay criteria is fulfilled.
Hole Board Data See Table A2.3.