What is a 2-beat clonus?
What will be an ideal response?
A clonus is a form of involuntary muscle movement marked by rapid contraction and relaxation. Clonus is more pronounced than fasciculations. When testing a reflex, the "beat" is the number of times the muscle contracts and relaxes. A 2-beat clonus is a muscle reaction with two distinct contraction-relaxation cycles. When testing a reflex, several beats (contractions) of clonus is a sign of a neurological disorder.
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In First Degree Heart Block, the QRS complex should be:
A) less than 0.12 sec. B) 0.12-0.20 sec. C) greater than 0.20 sec. D) the same as the PRI.
Which of the following is the cause of overlap error, when the overlapping appears to be more severe in the mesial or anterior region of the image?
A) The horizontal angulation was directed obliquely from the mesial. B) The horizontal angulation was directed obliquely from the distal. C) The horizontal angulation was directed obliquely from the occlusal. D) The horizontal angulation was directed obliquely from the apical.