The surface of cerebrum is increased by many gyri.

大脑表面由脑回的增多而增大。

The surface of cerebrum is increased by many gyri .

大脑表面由脑回的增多而增大。

The crests of the gyri are most susceptible to the traumatic forces.

脑回顶部容易受到创伤外力的打击。

The left cerebral hemisphere is smaller with deeper sulci and narrower gyri.

左侧的大脑半球小于右侧，脑沟较深，脑回也比右侧狭窄。

Inferior frontal sulcus is the landmark of middle and inferior frontal gyri.

额中回与额下回的区分是以矢状走行的额下沟为标志。