When closure in intercuspal position is attained during mastication, movement stop for about _________ msec before another cycle begins.
**Core Concept**
The question is testing the physiological principle of the timing and coordination of mastication, specifically the duration of intercuspal occlusal contact. During mastication, the jaw muscles contract and relax in a rhythmic manner to facilitate the chewing cycle.
**Why the Correct Answer is Right**
The correct answer reflects the time interval between the end of one masticatory cycle and the beginning of another. This pause is essential for the coordinated movement of the mandible and the muscles of mastication. Research has shown that this inter-cycle interval is approximately 500-600 milliseconds. This allows for the relaxation of the jaw muscles and the repositioning of the mandible for the next cycle. The timing of this pause is crucial for efficient and effective mastication.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the duration of intercuspal occlusal contact is typically much shorter than the inter-cycle interval.
* **Option B:** This option is incorrect because it suggests a much shorter duration than the actual inter-cycle interval.
* **Option C:** This option is incorrect because it suggests a longer duration than the actual inter-cycle interval.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the timing and coordination of mastication are crucial for efficient and effective food processing. Any disruption in this process can lead to difficulties with chewing and swallowing.
**Correct Answer: C. 500-600 msec**