Head showing the 'convolutions' (lobes) of the brain. Pen drawing after R. W. Reid.

Divided into frontal, temporal, and occipital lobes (inferior, middle and superior), and inferior and superior parietal lobes. A line runs diagonally from the centre to left, marked "ascending frontal convol." on right side, "ascending parietal con." on left. To the left of this are the "supra marginal conv." and the "angular convol."