During respiration,motion occurs at both the costovertebral and costotransverse joints.Which of the following statements is true regarding the axis of motion and the type of motion that occurs at these joints?
A) The axis of motion of the upper ribs is close to the sagittal plane.
B) The axis of motion of the lower ribs is close to the frontal plane.
C) Motion of the upper ribs increases in the transverse (medial/lateral)diameter of the thorax.
D) The lateral end of the lower ribs is displaced laterally.

Question

Quizplus · Accepted Answer

The lateral end of the lower ribs is displaced laterally during respiration, which is known as the "bucket handle" movement, increasing the transverse diameter of the thorax.

During Respiration,motion Occurs at Both the Costovertebral and Costotransverse Joints