Figure 2). The lobes To help us describe the different parts of the brain, the forebrain has been divided up into four sections, or 'lobes', shown in Figure 3. The occipital lobe is located at the back of the brain, and deals primarily with visual information from the eyes. The parietal lobe lies in the upper-rear portion of the brain, and is concerned with information about spatial relationships, perception and magnitude. The temporal lobe lies beneath the parietal lobe and is involved in memory and language. The frontal lobe can be thought of as our 'executive' or 'management' centre. The hemispheres In addition to being divided into lobes, the brain is also physically divided into two halves or hemispheres: left and right. The hemispheres are not entirely separate ? they are connected by a large bundle of fibres that allows them to talk to one another. While these hemispheres look almost identical from the outside, one hemisphere is usually dominant over the other. In all right-handed people, and the majority of left-handed people, it is the left hemisphere that is dominant. Organising principles There are certain principles that appear to govern the organisation of the brain. The division between the hemispheres signals one of these principles: lateralisation. Lateralisation literally means that some functions are best performed by the left side of the brain, while others are mainly supported by the right side. In the human nervous system, the left hemisphere controls the right side of the body and the right