The primary functions of whisking are spatial search and tactile exploration of objects and surfaces (see Vibrissal Behavior and Function). Whisking refers to a behavioral process, whereby motile facial vibrissae are repeatedly and rhythmically moved back and forth in order to sample the proximal environment ( Fig. Middle: Vibrissa angular velocity (\(\theta'\)). Top: Vibrissa angle (azimuth, \(\theta\)). The azimuth (\(\theta\)), elevation (\(\phi\)) and torsion (\(\zeta\)) angles are measured with respect to the skull. The shape and position of the vibrissa at the protraction set-point (green lines) is projected down and back onto the transverse (light red) and coronal (light orange) planes, respectively. After a protraction, the follicle is displaced a distance \(x\) anterior and \(z\) dorsal with respect to the skull (green dot). The origin is arbitrarily set to the retraction set-point of the follicle in the previous whisk cycle (blue dot). \(X\) indicate direction of nose (anterior), \(Y\) points lateral and \(Z\) upwards (dorsal). Conventions for representing vibrissa position, translation and rotation in head-centered Cartesian coordinates. Dotted lines indicate the vibrissa azimuth, estimated as the tangent at the base of the shaft. Blue and green lines display the vibrissa at retraction and protraction set-points respectively. Representation of the vibrissa azimuth angle (\(\theta\)), as seen from a top-down perspective. Data was obtained from a head restrained rat, and is adapted from (Pietr et al., 2010) with permission. The angle envelope (gray area) is indicated by the retraction (blue) and protraction (green) set-points (dotted lines) showing that the vibrissa position fluctuates on a slower timescale than the protraction (up) and retraction (down) whisk cycles. Solid black line is the time-varying azimuth angle of the C2 vibrissa relative to the head. The third is a left whisk on the first beat.Figure 1: a. ![]() The second starts in closed position with the man moving backward on the right foot. One begins in promenade position with the couple moving forward on the first beat. There are at least three versions of the left whisk. The left whisk is a Gold syllabus variation on the whisk. Left foot crosses behind right foot into PP Left foot back in contra body movement position (CBMP)īacking diagonal center against line of dance (LOD) It is very similar to the basic whisk except that it progresses backward rather than forward. The back whisk is a variation on the basic whisk. Right foot crosses behind left foot into PPįacing diagonal center, body turned slightly to left Left foot crosses behind right foot into promenade position (PP)ġ⁄ 4 between 1 and 2, body turns slightly less Slight body turn to right between 1 and 2 There is a sway to the left from the man's point of view, starting on the second beat. Basic whisk Īs in most waltz steps, the body rises starting at the end of the second beat and lowers on the end of the third. It can be performed after a reverse turn. It is one of several ways to get into promenade position and is used to turn dancers around corners or change their direction on the dance floor. ![]() The whisk is a ballroom dance step used in the waltz and American style Viennese waltz.
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