The corpus callosum is essential to the communication between the two hemispheres. Mutations in NF2 are commonly expressed in meningiomas located in the cerebral and cerebellar hemispheres. The motor areas are located in both hemispheres of the cortex. Similar patterns also occur at higher latitudes in both hemispheres. The pons co-ordinates activities of the cerebellar hemispheres. It is divided into two cerebral hemispheres. This relates to the hemispheric attention factors discussed in the brain hemispheres section above. A gyrotheodolite will function at the equator and in both the northern and southern hemispheres. There have been other hypotheses about the lateralization of the two hemispheres. This great circle divides a spheroid into two hemispheres. A hemispherectomy is the removal or disabling of one of the hemispheres of the brain. Those cells exist in both the northern and southern hemispheres. The climate patterns of the Northern and Southern Hemispheres generally mirror each other. Flamingos are large gregarious wading birds found in both the Western and Eastern Hemispheres. Flamingos are gregarious wading birds, usually tall, found in both the Western and Eastern Hemispheres.