ABSTRACT
Spells are transient disorders that indicate reversible alterations in neuronal excitability. Transient disorders can affect the central or peripheral nervous system and can be focal or generalized. Examples of generalized transient disorders are generalized seizures, syncope, concussion, and cataplexy. Examples of focal transient disorders are focal seizures, transient ischemic attacks, migraine, transient mononeuropathies, paresthesias, muscle cramps, and tonic spasms.
