Table 1.
Definition of variables
| Notation | Definition |
|---|---|
| Head variables | |
| xH | Head position along the x-axis |
| yH | Head position along the y-axis |
| ẋH | Head velocity along the x-axis |
| ẏH | Head velocity along the y-axis |
| ϕH | Head azimuth |
| ϕH,CS | Head azimuth at short contact onset |
| ϕH,CL | Head azimuth at long contacts onset |
| Whisker variables | |
| TW,prt | Whisker's duration of protraction |
| TW,ret | Whisker's duration of retraction |
| AW,prt | Whisker's amplitude during protraction |
| AW,ret | Whisker's amplitude during retraction |
| θW | Whisker angle (relative to head midline) |
| θW,max | Whisker angle at peak protraction |
| θW,min | Whisker angle at peak retraction |
| θ̇W | Whisker angular velocity |
| θ̇W,max | Whisker's maximal velocity during protraction |
| θ̇W,min | Whisker maximal velocity during retraction |
| θ̇̄W,prt | Whisker's averaged velocity during protraction |
| θ̇̄W,ret | Whisker's averaged velocity during retraction |
| Contact variables | |
| rCS | Radial distance of short contacts |
| rCL | Radial distance of long contacts |
| TCS | Contact duration of short contacts |
| rCL | Contact duration of long contacts |
| Sensory coding variables | |
| Δθonset | Angular difference between the contacting whisker and its homolog (not necessarily contacting) whisker on the other side, at the time of contact onset |
| Δtonset | Time delay between two sequential contralateral contacts |