Imaging may be done at a later point in time in those who return to their normal selves while in the emergency room. If a person has a previous diagnosis of epilepsy with previous imaging repeat imaging is not usually needed with subsequent seizures.In adults, testing electrolytes, blood glucose and calcium levels is important to rule these out as causes, as is an electrocardiogram. A lumbar puncture may be useful to diagnose a central nervous system infection but is not routinely needed. Routine antiseizure medical levels in the blood are not required in adults or children. In children additional tests may be required.A high blood prolactin level within the first 20 minutes following a seizure may be useful to confirm an epileptic seizure as opposed to psychogenic non-epileptic seizure. Serum prolactin level is less useful for detecting partial seizures. If it is normal an epileptic seizure is still possible and a serum prolactin does not separate epileptic seizures from syncope. It is not recommended as a routine part of diagnosis epilepsy. Differential diagnosis
Differentiating an epileptic seizure from other conditions such as syncope can be difficult. Other possible conditions that can mimic a seizure include: decerebrate posturing, psychogenic seizures, tetanus, dystonia, migraine headaches, and strychnine poisoning. In addition, 5% of people with a positive tilt table test may have seizure-like activity that seems due to cerebral hypoxia. Convulsions may occur due to psychological reasons and this is known as a psychogenic non-epileptic seizure. Non-epileptic seizures may also occur due to a number of other reasons.
Sojourn may refer to:

Books and periodicals
Sojourn (comics), a CrossGen comic book series
Sojourn (journal), a journal of social and cultural issues in Southeast Asia
Sojourn (novel), the 1991 novel in the Dark Elf Trilogy by R. A. Salvatore
The Sojourn, a 2011 novel by Andrew Krivak

Music
Sojourn (album), a 1977 album by Mickey Tucker
"Sojourn", a song by Natasha Bedingfield from Unwritten
Sojourn Music, an American Christian music group

Other uses
"Sojourn" (American Horror Story), a television episode
Sojourn, a predecessor of TorilMUD, a text-based online role-playing game
Sevoflurane, trade name Sojourn, an inhalational anaesthetic
Sojourn Shelton (born 1994), American football player

See also
Sojourner (disambiguation)