Epilepsy

Epilepsy is a complex disease with multiple causes. Sometimes an exact cause cannot be found.

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WHAT IS EPILEPSY?

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Epilepsy, the most common of the serious neurological conditions, is marked by repeated seizures that start in the brain.1, 2, 3 It is diagnosed after a person has had more than one seizure. All people having a seizure for the first time should see a specialist as soon as possible for diagnosis and treatment. 2, 4 About 70% of epileptics become seizure-free if they have the correct diagnosis and treatment. 5

WHAT CAUSES EPILEPSY?

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Epilepsy is a complex disease with multiple causes. Sometimes an exact cause cannot be found. 1, 6
There are three main groups: 1, 6

  • Epilepsy is caused by head injury, infections (e.g. meningitis), the brain not developing properly, stroke, tumour, or metabolic conditions.
  • Possible genetic inheritance from one or both parents.
  • Epilepsy where no cause can be found. 6

WHO IS AFFECTED?

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Worldwide about 65 million people have epilepsy, making it the most common neurological disorder after stroke. 1, 7 It can start at any age. Causes such as birth difficulties, childhood infections or accidents are more common in young people.

 

IN OLDER PEOPLE, STROKES CAN LEAD TO EPILEPSY. 2, 4

 

There is a 50% chance of having another seizure after the first. Once a person experiences two seizures, the chance of having another, the risk of recurrence appears to be at least 80%. 8

HOW DO PEOPLE WITH EPILEPSY PRESENT?

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A seizure is a sudden involuntary change in perception or behaviour. Epilepsy seizures are recurring and are caused by a change in the brain. 9
Seizures can present in a number of ways; simple or complicated, short or long lasting, they may affect consciousness, and may include other symptoms (examples below). 9
The form a seizure takes depends on where in the brain it starts and how far it spreads. 5

PARTIAL SEIZURES

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Simple partial seizures 5May experience an aura, or warning – a sensation in the stomach (epigastric sensation)
Do not lose consciousness
Some report a tingling or numbing sensation or flashing lights
Complex partial seizures 5Appears blank, stares, unaware of his/ her surroundings and may be unable to communicate verbally
May be abnormal movement of the upper and lower limbs (called posturing) and the head may turn to one side
May fall if standing
Involuntary movements also known as automatisms may be different in each person. Examples of these are:
Making noises, meaningless sounds, grunts, whistling noises, word or sentence repetition
Unexpectedly walking or running about the room quickly
Chewing movements, lip smacking, swallowing movements
Fiddling with hands, clothes and objects, or may tap, pat or rub objects

GENERALISED SEIZURES * BOTH HEMISPHERES OF THE BRAIN

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Typical absence seizures 5Suddenly stop activity and lose consciousness for the duration of the seizure

Many absence seizures go unnoticed, and in school children may reflect in poor scholastic performance.

MYOCLONIC SEIZURES

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Brief contraction of a muscle, muscle group or several muscle groups, experienced as either a single jerk, a cluster of jerks or a continuous spasm
Jerking motion sometimes strong enough to throw a person off a chair or to the floor if standing

ATONIC SEIZURES

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Result of sudden loss of the muscle tone responsible for posture If standing, person drops to the floor, or slumps if seated
Loses consciousness for a split second; in most cases can get up again straightaway

TONIC SEIZURES

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Sudden increased muscle tone causes muscles to contract
Neck extends, but does not move to either side, arms and shoulders are raised Hands are clenched in a fist shape or open with fingers extended outwards Eyes are open and eyeballs rotate upwards, legs extend outwards
Breathing muscles force air out of the lungs, causing loss of consciousness

TONIC CLONIC SEIZURES

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Convulsions can last for up to 60 seconds – then get weaker and slow down Difficulty breathing
Produce more saliva, which may be seen as frothing at the mouth
A period of rest after seizure – muscles relax and become limp

MEDICAL EMERGENCY SEIZURES

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Status Epilepticus is a medical emergency characterised by a single seizure or continuous seizures, which last for 30 minutes or longer. 1, 10
If a convulsive seizure lasts longer than five minutes, the following steps should be taken while waiting for emergency medical personnel11

  • Check that the mouth is empty
  • Position the head and body to free the airway
  • Put your cheek near their mouth to feel for breath and check the chest to see if they are breathing – if not breathing, or gasping only, cardiopulmonary resuscitation (CPR) should be given
  • Remove objects that could hurt the person, loosen tight clothes and ensure the environment is safe

HOW DOES IT IMPACT QUALITY OF LIFE?

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People with epilepsy are often faced with stigmatization and discrimination leading to social isolation, emotional distress, dependence on family, poor employment opportunities, and personal injury. 7 There is also a link between epilepsy and learning disability. Up to 60% of patients with severe learning disabilities have epilepsy. 1

CAN EPILEPSY BE TREATED?

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Anti-epileptic drugs (AEDs) are the main form of treatment, but should be taken only once the diagnosis is confirmed. AEDs may stop seizures from happening, but they do not cure epilepsy. Medication should always be tailored to the type of epilepsy, lifestyle and possible side effects. 1, 2 With the right AEDs, up to 70% of epileptics could control seizures (have them stopped). 2, 7
Starting treatment with anti-epileptic drugs after the first seizure decreases the chances of a second seizure compared with no treatment or delayed treatment.7 In addition, people who have been seizure free for at least two years can consider stopping AED treatment. Patients withdrawing from medication should not drive during the withdrawal and for six months afterwards.1Epilepsy is considered resolved if a person has been seizure-free for ten years, with at least five of those years without anti-epileptic medicines. 12

EPILEPSY AND PREGNANCY

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During pregnancy anti-epileptic medication can harm the unborn child, although uncontrolled seizures put both mother and child at risk. For this reason, women with epilepsy need to make informed decisions with their doctor and partner about contraception, conception, pregnancy, caring for children and breastfeeding. 1, 4
A class of medication used to treat epilepsy called enzyme-inducers can reduce the effectiveness of combined oral contraceptives, so additional precautions may be necessary or alternative methods of contraception considered. 1




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