Many different types of muscle contractions exist. In which type of contraction is muscle tension is generated, but the length of the muscle does not change?

Surgery

Many different types of muscle contractions exist. In which type of contraction is muscle tension is generated, but the length of the muscle does not change?

A tender swelling in submandibular triangle is mostly likely diagnosed as

In transfacial proportions, the face Is divided into how many segments:

Specific for Ankylosing spondylitis is true?