What is the "frontal lobe" and how does it factor into epilepsy?
The frontal lobe underlies the frontal bone, and it is a large part of cerebral cortex that also contains the motor cortex which is a strip that goes from the medial aspect of the frontal lobe all the way down to the sylvian fissure where the temporal lobe begins, and this motor strip controls the musculature for the contralateral body. Now, in seizures that start in the motor cortex, there can be a very restrictive focus. For example you could have a little brain tumor growing in the part of the motor cortex that controls the fingers on the hand contralateral to it, and if that's the case, if the seizure starts there, you may see uncontrollable movement of that hand, and then as the seizure generalizes, in other words as more neurons in the motor cortex become recruited into this synchronized bursting activity, you could have the entire arm moving and shaking, as well as spreading down to the leg on that same side. And then it could also cross the corpus callosum and then get the other side of the brain involved, as well as the other side of the body involved, in that motor seizure.