Image of the brain lobes, including the temporal lobe and somatomotor (primary motor) cortex. Several regions of the brain are involved in the act of writing. Primary areas are the superior parietal cortex and the frontal lobe, the region of the brain that plans out movement. An area of the frontal lobe that is especially active is Exner's area, located in the premotor cortex. The physical motion of the hand is controlled by the primary motor cortex, also located in the frontal lobe, and the right cerebellum. Writing creatively and generating ideas, on the other hand, is controlled by the limbic system, specifically involving the activity of the hippocampus, which is important in the retrieval of long-term memories. Words and ideas are cognized and understood by the temporal lobes, and these temporal lobes are connected to the limbic system. Image of the hippocampal gyrus Although<unk>  cannot be isolated to one specific part of the brain, some areas are known to have more of an effect than others. The hippocampus has been found to play a role in the occurrence of temporal lobe epilepsy and schizophrenia. In one study, rats induced with temporal lobe epilepsy showed an increase in dopamine neural activity in the hippocampus. Because<unk>  has been linked to temporal lobe epilepsy and schizophrenia, the hippocampus could have an effect on<unk>  as well. In another study, patients with bilateral hippocampal atrophy (BHA) showed signs of having Geschwind syndrome, including<unk> . While epilepsy-induced<unk>  is usually lateralized to the left cerebral hemisphere in the language areas,<unk>  associated with lesions and other brain damage usually occurs in the right cerebral hemisphere. Lesions to the right side of the brain usually cause<unk>  because they can disinhibit language function on the left side of the brain.<unk>  has also been known to be caused by right hemisphere strokes and tumors. Lesions to Wernicke's area (in the left temporal lobe) can increase speech output, which can sometimes manifest itself in writing.
Hypergraphia
Asymmetric crying facies
Leonine facies
Spotted lunulae
Paragraphia
Macrodontia 
Macroglossia
Brachyphalangy