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Sleep-deprived EEG

EEG (electroencephalography) is a test that records the brain’s electrical activity. Electrodes attached to your head are used to record electrical signals in the brain. These are registered by the EEG machine, where they are processed and displayed as waves on a screen. We also make a video recording of you. The video is an additional aid used when interpreting the recording. A sleep-deprived EEG is performed after a night without sleep.

Sleep deprivation means that you are deprived of the opportunity to sleep. Adults must not sleep at all the night before the test. Children may sleep for up to 4 hours the night before the test. Young children who nap during the day (up to 3 years old) may sleep as usual the night before the test, but will be examined during the day just before their usual bedtime.

For very young children, it may be beneficial to delay their sleep by 1–2 hours, but the child must not sleep just before the test. An EEG after sleep deprivation is performed because sleep deprivation increases the likelihood of abnormal findings in the test.

Referral and assessment

A routine EEG is usually performed first, before the doctor may refer you for a sleep-deprived EEG. In most cases, a doctor in specialist healthcare services refers patients for a sleep-deprived EEG.

For referrals to the National Centre for Epilepsy, see the specific referral criteria here    

Before

Adults

  • You must stay awake all night before the test.
  • Do not drink caffeinated or alcoholic drinks after 6 p.m.
  • You may otherwise eat and drink whatever you like. It is important that you have eaten breakfast before you arrive.
  • Take your regular medication as usual. You must tell the EEG technician which medications you have taken before the recording starts.
  • Your hair should be clean and free of oil, hairspray, hair wax and similar products.

Children under 3 years

  • The test should be performed when the child usually naps during the day. It is therefore important that you contact us and tell us when your child usually gets sleepy during the day so that we can schedule an appointment around that time.
  • The child should be woken approximately 2 hours before they would normally wake up and kept awake until the test.
  • It is important that your child has eaten before you arrive.
  • Regular medication can be taken as usual.

Children aged 3–10 years

  • The child should go to bed at the usual time, but should be woken at 3 a.m. and kept awake until the test.
  • The child can take their regular medication as usual, but please tell the EEG technician which medications they have taken before the recording starts.
  • The child’s hair should be clean and free of oil, hairspray, hair wax and similar products.

General information

Your hair should be clean and free of oil, hairspray, hair wax and similar products.

Bring a hat, cap or other head covering if you wish. Your hair may be wet and sticky after the electrode paste is washed out following the test.

Some locations have a washroom where you can wash your hair.

During

Electrodes are attached to your scalp using electrode paste. The paste holds the electrodes in place and ensures good signal transmission. There are usually 35 electrodes in total. Afterwards, you lie undisturbed on a couch with the lights off for about an hour.

Examination of young children

It is essential for the test that the child lies or sits completely still while the electrodes are attached. An adult should therefore accompany young children. Young children can sit on an adult’s lap while we attach the electrodes. Feel free to bring something to help keep the child calm, such as a bottle of drink, a pacifier, toys, books, an iPad or similar.

At the beginning of the test, it is common to induce specific types of brain activity by having you breathe deeply for three minutes. The test usually takes 1.5 to 2 hours.

After

The results of the test will be sent to the doctor/department that referred you.

Last professionally updated 11.04.2025

Contact

  • Contact the Department of Paediatrics and Adolescent Medicine (BUA), Arendal

    Where to attend

    Sørlandet Hospital Kristiansand:
    Neurology outpatient clinic, 1st floor.
    Sørlandet Hospital Arendal:
    Medical/neurology outpatient clinic, 2nd floor: 2E.
    Sørlandet sykehus Arendal sett fra luften.

    Sørlandet Hospital Arendal

    Sykehusveien 1

    Sykehusveien 1, 4838 Arendal

    Find your way

    Transport

    You can reach our locations by public transport. Visit Agder public transport to find your route:akt.no

    You may be entitled to reimbursement for necessary expenses when travelling to and from your place of treatment.

    As a general rule, you should use public transport, and you will have to pay a deductible. To get reimbursed for travel expenses you have paid, you must complete a travel expense claim form and send it toPatient travel.

    Practical information

    At the hospital pharmacy in Arendal, you can fill prescriptions and buy pharmacy products.
    You will find us on the 1st floor of the main building, just inside the entrance.
    Open every weekday from 08:30 to 16:00.

    Arendal Hospital Pharmacy

    Doesn’t the appointment time suit you? If you receive your appointment letter digitally via helsenorge.no, you can now send a message directly to the department you are visiting if you need a new appointment time. You must be a registered user on helsenorge to access the service.
    You can also contact the department where you have an appointment or call the switchboard on: 38 07 30 00
    ​

    Children and young people are affected when someone in the family is ill and need to understand what is happening. You may be a patient yourself, a relative, or a parent of sick children who have siblings. At the hospital, we will help ensure that the children and young people in your family are well cared for.

    Children as next of kin


    Visiting hours may vary between departments and locations. Please check with the department where you have an appointment for more information.

    See an overview of the hospital departments

    General visiting hours:

    Arendal:
    17:00–19:00 on weekdays
    14:00–16:00 and 18:00–19:00 on weekends and public holidays

    Flekkefjord:
    14:00–15:00 and 18:00–19:00
    Maternity ward: 17:00–19:00 (siesta/no visitors: 14:00–16:00)

    Kristiansand:
    17:00–19:00 on weekdays
    14:00–16:00 and 18:00–19:00 on weekends and public holidays

    Maternity ward: 16:00–18:00 every day for the newborn’s healthy siblings.

    The patient library in Arendal is located in the basement of the main building. It is self-service and open 24 hours a day. You can borrow books and read newspapers and magazines here.

    Many people want to bring flowers when visiting a patient in hospital, but due to allergies and the risk of infection, several of our departments are flower-free. If you wish to bring the patient a gift, we would appreciate it if you chose something other than flowers.

    Some patients also have allergic reactions to perfume or perfumed creams. We ask you to take this into consideration.

    Many patients and relatives wish to take photos/videos or blog about their time in hospital. Of course, you may do so, as long as you respect the privacy of other patients and staff.

    Here are a few useful tips on using social media for patients and relatives:

    • Be considerate of others. You must have consent if you want to take photos or videos of patients or staff. All patients are entitled to privacy while in hospital.
    • Parents/guardians decide whether you may take photos of children or publish photos of their children online. Parents should consider what is in the child’s best interests. When the child turns 12, their views must be given considerable weight. When the child turns 15, they decide for themselves whether it is okay to be photographed and whether the photos may be published.
    • Remember that staff must also give their permission if you want to publish photos you have taken of them.
    • You should remove content you have published if the person concerned asks you to. If others have posted pictures of you online without permission, you can ask them to delete them. If they do not comply, you can contact: www.slettmeg.no.

    Audio recording
    It is not illegal to record conversations in which you yourself participate for private use. However, publishing or sharing recordings requires the consent of the person you are speaking with. Secretly recording conversations in which you do not participate is illegal.

    Have you worked in healthcare or received healthcare outside the Nordic countries during the past year?

    This may include, for example, a hospital stay, extensive outpatient treatment or a visit to the dentist. In that case, your GP must test you for antibiotic-resistant bacteria (such as MRSA).

    Ask your GP to send you the test results before your appointment with us and bring them with you when you come to the hospital.

    If you are coming for a day visit or hospital admission, please bring the following:

    • Bring indoor shoes, a change of clothes and toiletries
    • Bring your regular medication. It may take time to obtain equivalent medication from the pharmacy.
    • Bring a list/overview of your regular medication
    • Medical equipment for everyday use

    Sometimes we need a room for rest and reflection. We have three such rooms available for you and your relatives. The rooms are open to everyone, regardless of their beliefs or religion.

    In Arendal, you will find the hospital’s quiet room/chapel on the basement floor of the main building. In Kristiansand, the room is on the first floor of the main building, north entrance. Both rooms are open 24 hours a day. In Flekkefjord, the chapel is by the car park, to the left of the main entrance.

    It is also possible to hold a memorial service in the chapel in the event of a death. Please contact the hospital chaplains to arrange this.

    Eg Church in Kristiansand is open on weekdays from 08:00 to 18:00 for anyone who would like a place for quiet and reflection. Open from 10:00 to 18:00 on weekends.

    Kiosk
    The kiosk is located in the lobby on the first floor.

    The kiosk sells items such as newspapers, magazines, fruit, chocolate, biscuits, ice cream, soft drinks, cards, flowers, some toiletries and various gift items.

    You can also buy buns, chicken wraps, rolls, salads, calzone, panini and hot dogs.

    Opening hours:
    Monday–Friday: 07:00–21:00
    Saturday and Sunday: 09:00–20:00

    Parking at Sørlandet Hospital is subject to a fee Monday to Friday, from 08:00 to 20:00. Anyone wishing to park on hospital grounds must follow the signs and instructions on the payment machines.

    At the hospitals in Arendal and Kristiansand, you can pay for parking with EasyPark (mobile app) or by card at other locations. Check the signs for payment options and time limits.

    At the hospital in Kristiansand, you can register your parking via the EasyPark app, at a machine where you park, or on the Flowbird website.

    Register your payment on the website

    Overview of parking spaces at Eg in Kristiansand
     

    At the hospital in Arendal, cameras read vehicle registration numbers when vehicles enter and exit the parking garage through the Autopay service. Follow the signs and read the instructions.

    Pay at the payment machine

    If you have not created a profile onAutopay.io​, you can pay at the machine by the main entrance. Enter your vehicle’s registration number. You can pay by card.

    Pay automatically

    Register as a customer with your registration number and bank card at www.autopay.io. Once registered, you will be charged automatically every time you park in the garage.

    At certain times, for example when there is a lot of snow, it can be difficult to find a parking space. We therefore recommend that you allow plenty of time.

    For electric cars:

    Electric cars are charged from the first hour.

    Need to charge your car? Not all our hospital sites have charging stations, and those that do have a limited number. You therefore cannot count on being able to charge your car while you are inside as a patient or visitor. You can find all charging stations here:

    All charging stations on one map – Norwegian EV Association​

    Blood donors can park free of charge at the hospital.
    For more information, contact the blood bank.


    Parents/guardians of children (under 18) who are staying in hospital for more than 14 daysare entitled to free parking for the remainder of the child’s stay. This also applies if the child’s stay begins at another hospital. Contact the hospital department for more information.

    A valid disabled parking permit entitles you to free parking in designated spaces
    Contact the Service Desk to register your disabled parking permit. Vehicles displaying a disabled parking permit are exempt from time limits unless otherwise indicated on the signs.

    Parking for expectant mothers in Kristiansand
    Free parking is available for expectant mothers outside the Women’s Department at the hospital in Kristiansand. The maximum parking time is 2 hours.

    Care benefits compensate for lost income when you care for a child who needs continuous supervision and care due to illness or injury. Read more aboutcare benefits, attendance allowance and basic benefitandNational Insurance benefitsat NAV.

    The Breathing Space is a place of refuge for children and young people whose seriously ill parents/guardians or siblings are hospitalised, or who are themselves admitted to the hospital in Arendal. The departments have keys to the room and can provide more information about the service. The room is on the basement floor of Wing C and has, among other things, a TV, computer and games.

    Smoking can cause discomfort to others. Thank you for being considerate and helping to keep Sørlandet Hospital smoke-free.

    The Service Desk in Arendal is right by the main entrance. You can contact the Service Desk with questions about your appointment at the hospital.

    Opening hours:
    Weekdays: 07:00–21:00.
    Saturdays, Sundays and public holidays: 09:00–20:00.

    Need someone to talk to? Our hospital chaplains have extensive experience supporting people in different life situations. They will meet you on your terms, regardless of your faith, beliefs or outlook on life. The hospital chaplains are available 24 hours a day, 7 days a week, for patients, relatives and staff.

    Would you like to get in touch? You can ask hospital staff for help or call the switchboard on 38 07 30 00.

    The hospital chaplains can also put you in touch with other faith and belief communities.

    If you need an interpreter, you must notify the hospital well in advance of your appointment. The cost of the interpreter is covered by the health service.Helsenorge.no

    Patients not fluent in Norwegian are entitled to an interpreter.Helsenorge.no/interpreter

    All visitors can use the hospital’s free wireless internet.

    Look for HSO-Gjest in your network list and follow the instructions to log in.

    If you can’t find the network, you are in an area where it is not yet available.

    If your child has been exposed to chickenpox or has chickenpox, please contact us. Your scheduled appointment/admission must then be postponed. This also applies if you are planning to visit the paediatric and adolescent department. Chickenpox can be dangerous for some of our patients.

  • Contact the Department of Neurology, Kristiansand

    Where to go

    Sørlandet Hospital Kristiansand:
    Neurology outpatient clinic, 1st floor.
    Sørlandet Hospital Arendal:
    Medical/neurology outpatient clinic, 2nd floor: 2E.

    Address

    Visiting hours

    • Today 17:00 - 19:00
    En by omgitt av trær og en elv

    Sørlandet Hospital Kristiansand

    Egsveien 100, building 10

    Egsveien 100, building 10, 4615 Kristiansand

    Directions

    Transport

    You can reach our locations by public transport. Visit Agder Kollektivtrafikk to find your route:akt.no

    You may be entitled to reimbursement of necessary travel expenses when travelling to and from your treatment location.

    As a general rule, you must use public transport and pay a co-payment. To get reimbursed for expenses you have paid for your journey, you must complete a travel expense claim form and send it toPatient travel.

    The hospital bus is a transport service for patients between the hospitals in Arendal and Kristiansand.

    There is also a return route between Vigeland, Mandal and Kristiansand.

    View the timetable

     

    Practical information

    At the hospital pharmacy in Kristiansand, you can fill prescriptions and buy pharmacy products.

    You’ll find us on the 1st floor of the main building, just by the entrance.
    Open weekdays from 08:30 to 16:30.

    Kristiansand Hospital Pharmacy

    Can’t make your appointment? If you receive your appointment letter digitally on helsenorge.no, you can now send a message directly to the department you are due to visit if you need to reschedule. You must be a registered user of Helsenorge to access this service.
    You can also contact the department where you have an appointment or call the switchboard at: 38 07 30 00
    ​

    Children and young people are affected when someone in the family is ill, and need to understand what is happening. You may be a patient or a relative, or a parent of a sick child who has siblings. We at the hospital will help ensure that the children and young people in your family are well cared for.

    Children as relatives


    Visiting hours may vary between departments and locations. Please check with the department where you have an appointment for more information.

    See an overview of the hospital’s departments

    General visiting hours:

    Arendal:
    17:00–19:00 on weekdays
    14:00–16:00 and 18:00–19:00 on weekends and public holidays

    Flekkefjord:
    14:00–15:00 and 18:00–19:00
    Maternity ward: 17:00–19:00 (quiet time/no visitors: 14:00–16:00)

    Kristiansand:
    17:00–19:00 on weekdays
    14:00–16:00 and 18:00–19:00 on weekends and public holidays

    Postnatal ward: 16:00–18:00 every day for the newborn’s healthy siblings.

    Most of the wards in Kristiansand have a small collection of books that patients and relatives can borrow. Contact your ward for more information and assistance.

    Many people wish to bring flowers when visiting a patient in hospital, but due to allergies and the risk of infection, several of our wards do not allow flowers. If you would like to bring the patient a gift, we would appreciate it if you chose something other than flowers.

    Some patients are also allergic to perfume or perfumed creams. We ask you to bear this in mind.

    Many patients and relatives want to take photos/videos or blog about their time in hospital. This is of course permitted, as long as you respect the privacy of other patients and staff.

    Here are a few useful tips on using social media for patients and relatives:

    • Be considerate of others. You must obtain consent if you want to take photos or videos of patients or staff. All patients are entitled to privacy while in hospital.
    • Parents/guardians decide whether you may take photos of children or publish photos of their children online. Parents must consider what is best for the child. When the child turns 12, their views must be given considerable weight. When the child turns 15, they decide for themselves whether they are comfortable being photographed and whether the photos may be published.
    • Remember that staff must also give their permission if you want to publish photos you have taken of them.
    • You should remove content you have published if the person concerned asks you to. If someone has posted photos of you online without permission, you can ask them to delete them. If they do not comply, you can contact: www.slettmeg.no.

    Audio recording
    It is not illegal to record conversations you take part in for private use. However, publishing and sharing recordings requires the consent of the person you are speaking with. Secretly recording conversations you are not part of is illegal.

    Our hairdresser is located on the third floor of the hospital’s main building and is open to everyone. If needed, the hairdresser can come to the ward. The hairdresser also fits wigs. Opening hours are Monday, Wednesday and Thursday from 09:00 to 16:00.
    Book an appointment: ​ 94 81 59 01 

    See alsowww.harspesialisten.no​​to book an appointment.

    ​Have you worked in healthcare or received healthcare outside the Nordic countries during the past year?

    This could include, for example, a hospital admission, extensive outpatient treatment or a visit to the dentist. In that case, your GP must test you for antibiotic-resistant bacteria (for example, MRSA).

    Ask your GP to send you the test result before your appointment with us and bring it with you when you come to the hospital.

    ​Sometimes we need a room for rest and reflection. We have three such rooms available for you and your relatives. The rooms are open to everyone, regardless of their beliefs or faith.

    In Arendal, you will find the hospital’s quiet room/chapel on the basement level of the main building. In Kristiansand, the room is on the first floor of the main building, north entrance. Both rooms are open 24 hours a day. In Flekkefjord, the chapel is by the car park, to the left of the main entrance.

    The chapel can also be used for memorial services following a death. To arrange this, contact the hospital chaplains.

    Eg Church in Kristiansand is open on weekdays from 08:00 to 18:00 for those who would like a place for silence and reflection. Open from 10:00 to 18:00 on weekends.

    ​Kiosk
    You will find the kiosk on the ground floor in the lobby of the main building at Eg.

    Opening hours:
    Monday–Friday: 08:00–20:00
    Saturday and Sunday: 09:30–20:00

    The kiosk sells newspapers, magazines, fruit, chocolate, biscuits, ice cream, soft drinks, flowers, cards and various gift items.

    Cafeteria
    The “Kilden” cafeteria is located next to the kiosk and has the same opening hours.

    The cafeteria serves, among other things, bread rolls, baguettes, salads, cakes, hamburgers and hot dogs.

    ​If you have a serious illness that requires treatment or follow-up over a period of time, you may be entitled to be assigned a contact doctor in the specialist health service.

    The contact doctor scheme in the specialist health service is intended to ensure that your follow-up as a patient is improved, safer and more effective. Having a contact doctor is a right for you as a patient and an obligation for the specialist health service.

    The contact doctor’s duties

    The contact doctor has a particular responsibility for following up with you during treatment or follow-up in the specialist health service. The contact doctor’s duties are to:

    • be your regular medical contact throughout your patient journey
    • be involved in your treatment or follow-up
    • stay informed about the status of your treatment
    • help ensure that your patient journey proceeds as planned
    • contact the relevant staff/medical unit if you have challenges with your care pathway
    • inform you and your next of kin
    • be available to you and healthcare professionals for medical questions
    • Your designated contact doctor does not replace your GP

    Guide for designated contact doctors in specialist healthcare services

     

    We encourage everyone to use their mobile phones considerately and be mindful of their fellow patients. It is important to put your phone on silent at night, and on silent or vibrate during the day. Out of consideration for other patients, please leave the room if you need to have a lengthy conversation.

    Parking at Sørlandet Hospital is subject to a fee Monday to Friday from 08:00 to 20:00. Anyone wishing to park on hospital grounds must follow the signs and instructions on the payment machines.

    At the hospitals in Arendal and Kristiansand, you can pay for parking using EasyPark (mobile app) or by card at other locations. Check the signs for payment options and time limits.

    At the hospital in Kristiansand, you can register your parking via the EasyPark app, at the machine where you park, or on the Flowbird website.

    Register payment on the website

    Map of parking areas at Eg in Kristiansand
     

    At the hospital in Arendal, cameras read vehicle registration numbers as vehicles enter and leave the parking garage through the Autopay service. Follow the signs and read the instructions.

    Pay at the payment machine

    If you have not created a profile onAutopay.io​, you can pay at the machine by the main entrance. Enter the vehicle registration number. You can pay by card.

    Pay automatically

    Register as a customer with your vehicle registration number and bank card at www.autopay.io. Once registered, you will be charged automatically every time you park in the garage.

    At certain times, for example when there is a lot of snow, it can be difficult to find a parking space. We therefore recommend that you allow plenty of time.

    For electric cars:

    Electric cars are subject to a fee from the first hour.

    Do you need to charge your car? Not all our hospital sites have charging stations, and those that do have a limited number. You therefore cannot rely on being able to charge your car while you are inside as a patient or visitor. You can view all charging stations here:

    All charging stations on one map - Norwegian EV Association​

    Blood donors can park free of charge at the hospital.
    For more information, contact the blood bank.


    Parents/guardians of children (under 18) with a hospital stay of more than 14 daysare entitled to free parking for the remainder of the child’s stay. This also applies if the child’s stay begins at another hospital. Contact the hospital department for more information.

    A valid disabled parking permit allows free parking in designated spaces
    Contact the Service Desk to register your disabled parking permit. Vehicles displaying a disabled parking permit are exempt from time limits unless otherwise stated on the sign.

    Parking for expectant mothers in Kristiansand
    Free parking is available for expectant mothers outside the Women’s Department at the hospital in Kristiansand. The maximum parking time is 2 hours.

    Smoking can cause discomfort to others. Thank you for being considerate and helping to keep Sørlandet Hospital smoke-free.

    The Service Desk in Kristiansand is located right next to the main entrance. You can contact them with questions about your appointment at the hospital.

    Opening hours:
    Weekdays: 07:30–21:00.
    Saturdays, Sundays and public holidays: 08:00–21:00.

    Do you need someone to talk to? Our hospital chaplains have extensive experience supporting people in various life situations. They meet you on your terms, regardless of your faith, beliefs or outlook on life. Hospital chaplains are available 24 hours a day, seven days a week, for patients, next of kin and staff.

    Would you like to get in touch? You can ask hospital staff for help or call the switchboard on 38 07 30 00.

    Hospital chaplains can also put you in touch with other faith and belief communities.

    If you need an interpreter, please notify the hospital well in advance of your appointment. The cost of the interpreter is covered by the health service.Helsenorge.no

    Patients not fluent in Norwegian are entitled to an interpreter.Helsenorge.no/interpreter

    All visitors can use the hospital’s free wireless internet.

    Look for HSO-Gjest in your network settings and follow the instructions to log in.

    If you cannot find the network, you are in an area where it has not yet been installed.

TEST VERSION
Machine-translated copy of sshf.no for testing only. Not official information.