parietal lobe

n. The portion of the brain in the middle of the side of the cerebral cortex separated from the frontal lobe by the central sulcus and from the temporal lobe by the lateral sulcus, and differentiated from the occipital lobe by a line from the preoccipital notch up to the parieto-occipital sulcus. The parietal lobe is involved in somatosensory functions including the sense of touch; the size, shape, and position of objects in space; speech perception; and integration of visual and bodily perceptions.