M1TI Osteopathic Manipulative Medicine (OMM) Practice Test

Which vertebral levels have spinous processes that project directly posterior relative to their transverse processes?

T1-T3 T4-T6 T7-T9 T10-T12

Correct Answer:

T1-T3

Explanation:

Spinous process orientation changes along the thoracic spine. In the upper thoracic vertebrae, the spinous processes are oriented more directly posterior, so their tips line up in the same plane as the transverse processes and project straight back. As you move to the middle and lower thoracic levels, the spinous processes angle more downward (inferiorly) and overlap with the vertebra below, so they don’t project directly posteriorly relative to the transverse processes. Therefore, the levels where the spinous processes project directly posterior relative to their transverse processes are the upper thoracic segments, T1 through T3.

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