Lateral tilt of the pelvis ____. occurs commonly in standing. occurs when 2 iliac crests are at the same level. is named by the unsupported side. is definitely abnormal when walking.

The lateral tilt of the pelvis is named by the unsupported side. This movement often occurs during walking or standing on one leg. When the pelvis tilts, it is usually towards the unsupported side, hence it is named after that side. For example, if you're standing on your right leg and your left leg is in the air, your pelvis may tilt towards the left. This is called a left lateral pelvic tilt.

The statement "occurs commonly in standing" is partially correct. While lateral pelvic tilt can occur during standing, it's more common during activities that involve standing on one leg, such as walking or running.

The statement "occurs when 2 iliac crests are at the same level" is incorrect. In a neutral position, the two iliac crests should be at the same level. A lateral pelvic tilt occurs when one iliac crest is higher than the other.

The statement "is definitely abnormal when walking" is also incorrect. A certain degree of lateral pelvic tilt is normal during walking. However, an excessive or persistent tilt could indicate a problem.