For timing variables where the null hypothesis was rejected (chewing cycle duration, jaw closing time, time of tongue rostralmost position, interswallow interval, and chewing rate), the alternative hypothesis that durations increased, indicating a slowing down of movement, was supported.
Variable Description Mandible: dorsoventral range Within a chewing cycle, maximum distance travelled in the dorsoventral (y) axis by the mandibular marker.
No similar examinations were found in the literature obtained by this kind of analysis with the freedom that the 3D plot provides and particularly methods able to separate the trajectories of the set of chewing cycles
. All the features related to cycle shapes reveal the complexity of this rhythmical motor-sensory activity [2-7].
This peripheral level responds to interferences by slowing or even stopping the chewing cycle
, and by lowering the amount of occlusal force used during mastication.
The first peak force of the two different food boluses decreased with chewing cycles and was significantly higher for the lean layer food samples (P < 0.05, Figure 4(a)).
On a microstructural level, the images of the two different food boluses at 20% mastication were similar to the original food samples because of the small amount of saliva added and few chewing cycles conducted, while, in the next mastication stages, the degree of degradation for the two styles of bolus differed according to the different chewing times and different masticatory forces .
Mandibular movements were recorded during mastication of 3.4 g of a rubberbased artificial test material (Heraeus Kulzer, Hanau, Germany) for 15 chewing cycles
. The jaw-tracking device was set at Scan 3 mode.