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INRA
24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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Human Nutrition Unit

Zone de texte éditable et éditée et rééditée

Gait analysis system CatWalkTM XT

Study of rodent motor performance

The CatWalk XT system is a complete automated and highly sensitive tool to assess voluntary gait and locomotion. It can be used to evaluate any kind of experimental model or procedure that has an effect on the locomotor ability of small animals (i.e. rat, mouse). The rat or mouse traverses a glass bridge voluntarily (towards a goal box), and its footprints are captured by a high speed camera. Then, the CatWalk XT system visualizes the prints and calculates statistics related to print dimensions and the time and distance relationships between footfalls. Up to 200 parameters can be calculated for qualitative and quantitative analysis of individual footfalls and gait .

Static parameters
Dynamic paramaters

Max contact max intensity

Maximum intensity at the moment of maximum contact of the paw.

Stand (stance) (sec)

Duration of contact of a paw with the glass bridge.

Paw angle body axis (°)

Minimum angle between the axis of the body of the animal and the axis of the paw.

Swing (sec)

Duration of no contact of a paw with the glass bridge.

Print lenght (cm)

Length of footprinting.

Stride lenght (sec)

Distance between 2 successive placements of the same paw.

Print width (cm)

Width of footprinting.

Step cycle (sec)

Time between 2 successive placements of the same paw. =stand+swing

Base of support (cm)

Average distance between front paws or hind paws.

Duty cycle (%)

Duration of the contact of a pawwith respect to the total duration of the cycle of this paw. =[stand/(stand+swing)]x100

Toe spread (cm)

Distance between the first and the fifth finger of the paw.

Swing speed (cm/sec)

Speed of the paw during the swing phase.

...

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The Catwalk TX system allows to quantify the alterations or modifications of voluntary locomotion that are associated with the development of pathologies such as diseases of the peripheral or central nervous system, muscle atrophy, athritis, or locomotor alterations associated with aging.

Contact: Jérôme Salles

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