Whatever thoughts dwelt within his skull were beyond human comprehension.

A madman had lived for a moment within his skull!

The name thrummed within his skull, and it felt right.

Within my skull I felt a lightness like a reduction of gravity.

The cop's eyes had become so radiantly green, there seemed to be a light source behind them, a fire within his skull.

It was as if the living, growing invaders within his skull had been killed first.

All the while the sense of danger drummed within his skull.

When it does not pound, a fire burns within his skull.

A rush of blood and wonder mounts within Mallory's skull.

Usually, the area within a baby's skull doubles in the first 6 months of life and doubles again by age 2.