Epilepsy is a brain disorder caused by disturbed neuronal activity in the brain, which can cause strange sensations, emotions, behaviors, or sometimes convulsions. It is classified as either primary generalized or partial seizures. Diagnosis involves EEG, brain imaging, and blood tests to identify potential causes. Treatment primarily consists of anti-seizure medications, but may also include dietary therapies, vagus nerve stimulation, or surgery to remove the affected part of the brain.

3. Introduction
Epilepsy is a brain disorder in which clusters of nerve
cells, or neurons, in the brain sometimes signal
abnormally. the normal pattern of neuronal activity
becomes disturbed, causing strange sensations,
emotions, and behavior or sometimes convulsions,
muscle spasms, and loss of consciousness.
In epilepsy, the normal pattern of neuronal activity
becomes disturbed, causing strange sensations,
emotions, and behavior, or sometimes convulsions,
muscle spasms, and loss of consciousness.

4. Epilepsy
Epilepsy is a disorder of the brain's electrical
system. Abnormal electrical impulses cause brief
changes in movement, behavior, sensation, or
awareness. These interruptions, known as
seizures, may last from a few seconds to a few
minutes. People who have had two or more
seizures are considered to have epilepsy.

5. Risk factors
 Babies who are born with abnormal brain
structures
 Bleeding into the brain
 Abnormal blood vessels in the brain
 Serious brain injury or lack of oxygen to the brain
 Brain tumors
 Infections of the brain: abscess, meningitis, or
encephalitis
 Stroke resulting from blockage of arteries
 Cerebral palsy

6. Causes
 an imbalance of nerve signaling chemicals called
neurotransmitters.
 Genetic Factors- Abnormalities in the genes that
control neuronal migration -- a critical step in
brain development -- can lead to areas of
misplaced or abnormally formed neurons, or
dysplasia, in the brain that can cause epilepsy.
 ,brain tumors,
 alcoholism,
 Alzheimer's disease frequently lead to epilepsy
because they alter the normal workings of the
brain.

7.  Meningitis, AIDS, viral encephalitis, and other
infectious diseases can lead to epilepsy,
 hydrocephalus -- a condition in which excess
fluid builds up in the brain.
 Epilepsy also can result from intolerance to
wheat gluten (also known as celiac disease), or
from a parasitic infection of the brain called
neurocysticercosis.
 Head Injury
 Poisoning- exposure to lead, carbon monoxide

8. Classification
1.Primary generalized seizures begin with a
widespread electrical discharge that involves both
sides of the brain at once.
2. Partial seizures-Partial seizures begin with an
electrical discharge in one limited area of the
brain. Some are related to head injury, brain
infection, stroke, or tumor, but in most cases the
cause is unknown.

10. The patient loses consciousness and usually
collapses. The loss of consciousness is followed by
generalized body stiffening (called the "tonic"
phase of the seizure) for 30 to 60 seconds, then by
violent jerking (the "clonic" phase) for 30 to 60
seconds, after which the patient goes into a deep
sleep (the "postictal" or after-seizure phase.
During grand-mal seizures, injuries and accidents
may occur, such as tongue biting and urinary
incontinence.

11. Primary Generalized Seizures or
grandmal seizures
 Absence seizures-involve an interruption to consciousness
where the person experiencing the seizure seems to become
vacant and unresponsive for a short period of time (usually
up to 30 seconds). Slight muscle twitching may occur.
 Atypical absence seizure-involve the loss of muscle tone,
causing the person to fall to the ground. These are
sometimes called 'drop attacks' but should be distinguished
from similar looking attacks that may occur in cataplexy.
 Myoclonic seizures-involve an extremely brief (< 0.1 second)
muscle contraction and can result in jerky movements of
muscles or muscle groups, usually on both sides of the body.

12.  Atonic seizures-cause a loss of normal muscle tone
 Tonic seizures-cause stiffening of muscles of the body,
generally those in the back, legs, and arms.
 Clonic seizures-are myoclonus that are regularly repeating at
a rate typically of 2-3 per second. in some cases, the length
varies.
 Tonic-clonic seizures- involve an initial contraction of the
muscles (tonic phase) which may involve tongue biting,
urinary incontinence and the absence of breathing. This is
followed by rhythmic muscle contractions (clonic phase). This
type of seizure is usually what is referred to when the term
'epileptic fit' is used colloquially

13. Partial Seizures
1. Simple partial seizures
2. Complex partial seizures
3. Secondarily generalized seizures

14. Partial seizures
Focal seizures, also called partial seizures, occur in
just one part of the brain.
In a simple focal seizure, the person will remain
conscious but experience unusual feelings or
sensations that can take many forms. The person
may experience sudden and unexplainable
feelings of joy, anger, sadness, or nausea. He or
she also may hear, smell, taste, see, or feel things
that are not real.

15. subdivided into four categories
according to the nature of their symptoms:
 Motor -Motor symptoms include movements such as
jerking and stiffening.
 autonomic -Autonomic symptoms affect the autonomic
nervous system, which is the group of nerves that
control the functions of our organs, like the heart,
stomach, bladder, intestines.
 sensory-Sensory symptoms caused by seizures involve
unusual sensations affecting any of the five senses
(vision, hearing, smell, taste or touch, are called "auras
 psychological-Simple partial seizures with psychological
symptoms are characterized by various experiences
involving memory (the sensation of deja-vu), emotions
(such as fear or pleasure), or other complex
psychological phenomena.

16. complex partial seizure
A complex partial seizure may involve the
unconscious repetition of simple actions, gestures
or verbal utterances, or simply a blank stare and
apparent unawareness of the occurrence of the
seizure, followed by no memory of the seizure.
examples are
repetitious behaviors such as
blinks, twitches, mouth movements, or even
walking in a circle. These repetitious movements
are called automatisms

17. Partial Seizures Symptoms
(Produced by a small area of the brain)
Simple (awareness is retained) a) Jerking, muscle rigidity, spasms, head-
a. Simple Motor turning
b. Simple Sensory b) b. Unusual sensations affecting either
c. Simple Psychological the vision, hearing, smell taste or touch
c) c. Memory or emotional disturbances
Complex Automatisms such as lip smacking, chewing,
(Impairment of awareness) fidgeting, walking and other repetitive,
involuntary but coordinated movements
Partial seizure with secondary generalization Symptoms that are initially associated with a
preservation of consciousness that then
evolves into a loss of consciousness and
convulsions.

18. Diagnosis

19. 1) An EEG (electroencephalogram) can confirm the
diagnosis and offer more information about the
seizures. This painless procedure records the
brain's electrical activity as wavy lines. The
pattern changes during a seizure and may reveal
which part of the brain is prone to seizures.

21. Brain scan
Detailed images of the brain from CT or MRI scans
can help doctors rule out tumors or blood clots as
a possible cause of seizures. This information is
essential in planning surgery to treat epilepsy

22.  CT and MRI scans reveal the structure of the brain,
which can be useful for identifying brain tumors,
cysts, and other structural abnormalities.
 SPRCT- (single photon emission computed
tomography) is a relatively new kind of brain scan
that is sometimes used to locate seizure foci in the
brain.
 Magnetoencephalogram/MEG- detects the
magnetic signals generated by neurons to allow
doctors to monitor brain activity at different
points in the brain over time, revealing different
brain functions

23.  Magnetic resonance spectroscopy (MRS) that
can detect abnormalities in the brain's
biochemical processes, and with near-infrared
spectroscopy, a technique that can detect
oxygen levels in brain tissue.
 Blood Tests- infections, lead poisoning, anemia,
and diabetes that may be causing or triggering
the seizures.

24. Treatment

25.  Anti-seizure drugs are the most common
treatment for epilepsy.eg. carbamazepine,
valproate, lamotrigine, oxcarbazepine, or
phenytoin .
 For absence seizures, ethosuximide is often the
primary treatment.
 A ketogenic diet can eliminate or nearly eliminate
seizures in a third of children with epilepsy who try
it. The diet is very high in fat and low in carbs, a
combination that makes the body burn fat instead
of sugar. This creates changes in the brain that
reduce or eliminate seizures.

26. A ketogenic diet -causes the body to break down
fats instead of carbohydrates to survive. This
condition is called ketosis.
side effects include retarded growth due to
nutritional deficiency and a buildup of uric acid in
the blood, which can lead to kidney stones.
One study showed that a byproduct of ketosis
called beta-hydroxybutyrate (BHB) inhibits
seizures .

28. VNS
Vagus nerve stimulation, a treatment that is
sometimes called a "pacemaker for the brain." It
uses a small surgically implanted device to send
electrical pulses to the brain. The pulses travel via
the vagus nerve, a large nerve in the neck. VNS is
an option for people who don't do well with
medication

29. Side effects of the vagus nerve stimulator are
generally mild but may include hoarseness, ear
pain, a sore throat, or nausea.

31. Surgical management

32. lobectomy -is a temporal lobe resection, which is
performed for people with temporal lobe epilepsy.
Temporal lobe resection leads to a significant
reduction or complete cessation of seizures about
70 - 90 percent of the time.
Corpus callosotomy, or severing the network of
neural connections between the right and left
halves, or hemispheres, of the brain.

33. Hemispherectomy and hemispherotomy-remove
half of the brain's cortex, or outer layer.

34. Transcranial magnetic stimulation (TMS), a
procedure which uses a strong magnet held
outside the head to influence brain activity, may
reduce seizures. They also hope to develop
implantable devices that can deliver drugs to
specific parts of the brain.