epilepsy simple focal seizure true The person may have different symptoms depending on which area of the brain is involved. If the abnormal electrical brain function is in the occipital lobe (the back part of the brain that is involved with vision), sight may be altered, but muscles are more commonly affected. The seizure activity is limited to an isolated muscle group, such as the fingers, or to larger muscles in the arms and legs. Consciousness is not lost in this type of seizure. The person may also experience sweating, nausea, or become pale. Single Focal Epilepsy http://www.case.edu/EpSO.owl#SingleFocalEpilepsy