During palpation, what is the indicator of thoracic vertebral rotation?

The indicator of thoracic vertebral rotation during palpation is the asymmetry of the transverse processes. When one vertebra rotates, the transverse processes on that side can become more prominent or feel different in relation to the other side due to the rotated position of the vertebra. This asymmetry provides a tactile cue to the practitioner that rotation has occurred in the thoracic region.

In contrast, other factors like increased flexion or decreased extension do not specifically indicate rotation but rather involve overall movements in the thoracic spine. Bone density, on the other hand, refers to the mineral composition of the bone rather than the positioning or movement of vertebrae and does not provide direct information about rotation during palpation. Thus, the palpation of transverse processes allows for a clear assessment of vertebral rotation, making it the correct indicator in this context.