@lspencer34
Hi, This may be a long shot but I just reread your post and was thinking perhaps your husband is experiencing Gelastic seizures which are Focal Seizures. These are sometimes referred to as Laughing Seizures. Although the person is laughing or chuckling during these seizures the person is not happy and in fact may be frightened. Onlookers often don’t know it’s a seizure possibly because the victim is aware of what is happening so it may appear they are willingly laughing but that’s not the case. They have no control of the laughter. These seizures don’t usually originate in the Temporal lobe but it is possible. You might want to ask your Neurologist about this, especially since there is a lesion on his Temporal lobe.
I’m curious how accurate a scalp EEG is in locating a seizure focus.
Good luck,
Jake