The left parietal lobe is the left side of one of the four lobes of the cerebrum, which is the largest portion of the brain. The parietal lobe is located directly underneath the skull at the back of the head. It processes sensory and visual input.
Each side of the parietal lobe governs different types of sensory input. The left side processes spoken and written language. The right side processes information about spatial relationships.
The frontal lobe, occipital lobe and temporal lobe are the other three lobes that make up the cerebrum. The frontal lobe governs reasoning and body movements, the occipital lobe interprets visual information and the temporal lobe interprets sounds.