College of Massage Therapists of British Columbia (CMTBC) Practice Exam

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Is the external surface of the rib characterized by a costal groove?

True
False

The correct answer is: False

The statement is false because the costal groove is a specific anatomical feature that is located on the internal surface of the rib, rather than the external surface. The costal groove is a shallow indentation that runs along the inferior border of the rib, providing a pathway for the intercostal nerves and blood vessels. This groove allows these structures to lie in a protected position between the ribs, preserving their integrity and function during activities such as breathing. The external surface of the rib is typically smooth and convex, serving as the attachment site for muscles and providing structural support to the thoracic cage. Understanding these anatomical distinctions is crucial for identifying rib features in clinical practice and effectively performing assessments or treatments related to the thoracic region.