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epilepsy [2023/11/07 12:07] – andrewtaustinepilepsy [2026/08/15 18:34] (current) – andrewtaustin
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-{{tag>Related}} ====== Epilepsy: An Overview of Types ======+{{tag>Related}} 
 +====== Epilepsy: An Overview of Types ======
  
-Epilepsy is a neurological disorder **characterised by the propensity for recurrent, unprovoked seizures**, which are transient occurrences of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain. The disorder encompasses a spectrum of conditions with varying aetiologies, clinical presentations, and seizure types. In the absence of expert medical advice and appropriate oversight, individuals with a documented history of epilepsy must be precluded from receiving any form of Integral Eye Movement Therapy (IEMT). This contraindication arises from the necessity to mitigate potential risks and ensure the safety and well-being of the client, as such therapies may provoke seizures in susceptible individuals. +Epilepsy is a neurological disorder[(Neurological disorder[[https://www.who.int/news-room/questions-and-answers/item/mental-health-neurological-disorders]])] **characterised by the propensity for recurrent, unprovoked seizures**, which are transient occurrences of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain. The disorder encompasses a spectrum of conditions with varying aetiologies, clinical presentations, and seizure types.
  
-==== Classification Based on Seizure Type ====+In the absence of expert medical advice and appropriate oversight, individuals with a documented history of epilepsy must be precluded from receiving any form of Integral Eye Movement Therapy (IEMT). This contraindication arises from the necessity to mitigate potential risks and ensure the safety and well-being of the client, as such therapies may provoke seizures in susceptible individuals.
  
-The primary classification of epilepsy is determined by the **type of seizure**, which is categorised into two main groups:+<WRAP CENTER 50%> 
 +{{youtube>Nds2U4CzvC4}} 
 +</WRAP>
  
-  * **Focal Seizures**: Originating within networks limited to one hemisphere. These are subdivided based on the level of consciousness: +===== Classification Based on Seizure Type =====
-    * **With Retained Awareness**: Formerly known as simple partial seizures. +
-    * **With Impaired Consciousness**: Previously referred to as complex partial seizures. +
-    * **Evolution to Bilateral Tonic-Clonic Seizures**: Presenting with a progression of muscle rigidity followed by rhythmic muscle contractions.+
  
-  * **Generalised Seizures**: Engaging networks distributed across both hemispheres simultaneously. Types include: +The primary classification of epilepsy is based on **seizure type**. Seizures are categorised into two main groups: 
-    * **Absence Seizures**: Manifest as brief lapses in awareness. + 
-    * **Myoclonic Seizures**: Characterised by sudden, brief muscle jerks. +  * **Focal Seizures[(Focal Seizures[[https://epilepsysociety.org.uk/about-epilepsy/epileptic-seizures/seizure-types]])]**: These originate within networks limited to one hemisphere. These are subdivided based on the level of consciousness: 
-    * **Tonic-Clonic Seizures**: Known for convulsive movements. +    * **With Retained Awareness**: These were formerly known as simple partial seizures. 
-    * **Atonic Seizures**: Leading to sudden loss of muscle tone.+    * **With Impaired Consciousness**: These were previously referred to as complex partial seizures. 
 +    * **Evolution to Bilateral Tonic-Clonic Seizures**: These present with a progression of muscle rigidity followed by rhythmic muscle contractions. 
 + 
 +  * **Generalised Seizures**: These engage networks distributed across both hemispheres simultaneously. Types include: 
 +    * **Absence Seizures**[(Absence Seizures [[https://epilepsysociety.org.uk/about-epilepsy/epileptic-seizures/absence-seizures]])]: These manifest as brief lapses in awareness. 
 +    * **Myoclonic Seizures**[(Myoclonic Seizures [[https://epilepsysociety.org.uk/about-epilepsy/epileptic-seizures/myoclonic-seizures]])]: These are characterised by sudden, brief muscle jerks. 
 +    * **Tonic-Clonic Seizures**[(Tonic-Clonic Seizures [[https://epilepsysociety.org.uk/about-epilepsy/epileptic-seizures/tonic-clonic-seizures]])]: These are known for convulsive movements. 
 +    * **Atonic Seizures**[(Atonic Seizures [[https://epilepsysociety.org.uk/about-epilepsy/epileptic-seizures/atonic-seizures]])]: These lead to a sudden loss of muscle tone.
  
 ===== Focal Seizures ===== ===== Focal Seizures =====
 +
 Focal seizures, formerly known as partial seizures, originate within networks confined to one hemisphere of the brain. The clinical manifestations of these seizures are remarkably diverse, reflecting the region of the cortex in which the seizure originates. Focal seizures, formerly known as partial seizures, originate within networks confined to one hemisphere of the brain. The clinical manifestations of these seizures are remarkably diverse, reflecting the region of the cortex in which the seizure originates.
  
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 ==== Evolution to Bilateral Tonic-Clonic Seizures ==== ==== Evolution to Bilateral Tonic-Clonic Seizures ====
-Some focal seizures can generalise, leading to bilateral tonic-clonic seizures. The initial focal onset may manifest as a warning or 'aura' before consciousness is lost and generalised convulsive movements begin. The tonic phase is characterised by a sudden loss of consciousness with muscle stiffening, while the clonic phase involves rhythmic jerking movements. Sudden cessation of respiration during the tonic phase may lead to cyanosis, and injuries can occur from falls or during convulsions.+Some focal seizures can generalise, leading to bilateral tonic-clonic seizures. The initial focal onset may manifest as a warning or 'aura' before consciousness is lost and generalised convulsive movements begin. The tonic phase is characterised by a sudden loss of consciousness with muscle stiffening, while the clonic phase involves rhythmic jerking movements. Sudden cessation of respiration during the tonic phase may lead to cyanosis[(Cyanosis [[https://www.nhs.uk/conditions/blue-skin-or-lips-cyanosis/]])], and injuries can occur from falls or during convulsions.
  
 ===== Generalised Seizures ===== ===== Generalised Seizures =====
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 ==== Absence Seizures ==== ==== Absence Seizures ====
-Typically presenting in childhood and often misinterpreted as inattentiveness, absence seizures are brief, lasting only a few seconds. The hallmark of these seizures is a disruption of consciousness associated with a cessation of ongoing activities. A blank stare, subtle body movements, and automatism, such as blinking or slight twitching of the lips, are characteristic. The electroencephalogram (EEG) during these seizures shows a pattern of 3 Hz spike-and-wave discharges that are bilateral and symmetrical.+Typically presenting in childhood and often misinterpreted as inattentiveness, absence seizures are brief, lasting only a few seconds. The hallmark of these seizures is a disruption of consciousness associated with a cessation of ongoing activities. A blank stare, subtle body movements, and automatisms, such as blinking or slight twitching of the lips, are characteristic. The electroencephalogram (EEG) during these seizures shows a pattern of 3 Hz spike-and-wave discharges that are bilateral and symmetrical.
  
 ==== Myoclonic Seizures ==== ==== Myoclonic Seizures ====
-Myoclonic seizures are characterised by abrupt, brief muscle jerks, which may be singular or occur in a series. The jerks are typically symmetrical and can result in the dropping of objects or even falls. These seizures are often seen in conjunction with various epilepsy syndromes and can be an early warning sign of a more severe seizure type developing.+Myoclonic seizures are characterised by abrupt, brief muscle jerks, which may be singular or occur in a series. The jerks are typically symmetrical and can result in the dropping of objects or even falls. These seizures are often seen in conjunction with various epilepsy syndromes and can be an early warning sign of the development of a more severe seizure type.
  
 ==== Tonic-Clonic Seizures ==== ==== Tonic-Clonic Seizures ====
-The most dramatic and readily identified seizure type, tonic-clonic seizures involve an initial tonic phase with muscle rigidity, followed by a clonic phase with rhythmic muscle contractions. These seizures are often preceded by a loud cry due to the forcible expiration of air from the lungs, followed by a loss of consciousness. The postictal phase may involve deep sleep, headache, confusion, and disorientation.+Tonic-clonic seizures are among the most dramatic and readily identified seizure types and involve an initial tonic phase with muscle rigidity, followed by a clonic phase with rhythmic muscle contractions. These seizures are often preceded by a loud cry due to the forcible expiration of air from the lungs, followed by a loss of consciousness. The postictal phase may involve deep sleep, headache, confusion, and disorientation.
  
 ==== Atonic Seizures ==== ==== Atonic Seizures ====
-Atonic seizures result in an abrupt loss of muscle tone, which often leads to falls and potential injury, hence the term 'drop attacks.' These seizures are particularly challenging to manage because of the suddenness and the risk of trauma. Protective headgear may be recommended for individuals with frequent atonic seizures to mitigate the risk of head injury.+Atonic seizures result in an abrupt loss of muscle tone, which often leads to falls and potential injury, hence the term 'drop attacks'. These seizures are particularly challenging to manage because of the suddenness and the risk of trauma. Protective headgear may be recommended for individuals with frequent atonic seizures to mitigate the risk of head injury.
  
-==== Aetiological Classification ====+===== Aetiological Classification =====
  
-Epilepsy can also be categorised based on its **aetiology**, such as:+Epilepsy can also be categorised based on its **aetiology**:
   * **Structural**   * **Structural**
   * **Genetic**   * **Genetic**
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 These aetiologies significantly influence the treatment and management of the condition. These aetiologies significantly influence the treatment and management of the condition.
  
-==== Epilepsy Syndromes ====+===== Epilepsy Syndromes =====
  
-In addition to seizure type and aetiology, **epilepsy syndromes** are recognised by a cluster of features that occur together, which can include:+In addition to seizure type and aetiology, **epilepsy syndromes[(Epilepsy Syndromes [[https://epilepsysociety.org.uk/about-epilepsy/information-parents/childhood-epilepsy-syndromes]])]** are recognised by a cluster of co-occurring features that can include:
   * **Specific Seizure Types**   * **Specific Seizure Types**
   * **EEG Findings**   * **EEG Findings**
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 This concept is instrumental in directing specific management strategies. This concept is instrumental in directing specific management strategies.
  
-====== Management Strategies for Epilepsy ======+===== Management Strategies for Epilepsy =====
  
-The management of epilepsy is tailored to the individual, taking into account the type and frequency of seizures, epilepsy syndrome, and the patient's lifestyle and overall health. The overarching goal is to achieve seizure control with minimal side effects to enable a normal life as far as possible.+The management of epilepsy is tailored to the individual, taking into account the type and frequency of seizures, epilepsy syndrome, and the patient's lifestyle and overall health. The overarching goal is to achieve seizure control with minimal side effects to enable as normal a life as possible.
  
 ==== Pharmacotherapy ==== ==== Pharmacotherapy ====
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   * **Surgical Options**: Resection, disconnection procedures, or hemispherectomy.   * **Surgical Options**: Resection, disconnection procedures, or hemispherectomy.
-  * **Pre-surgical Evaluation**: To assess the potential benefits and risks.+  * **Pre-surgical Evaluation**: This assesses the potential benefits and risks.
  
 ==== Neurostimulation Techniques ==== ==== Neurostimulation Techniques ====
-For those unsuitable for surgery, neurostimulation presents an alternative:+For those for whom surgery is unsuitable, neurostimulation presents an alternative:
  
-  * **Vagus Nerve Stimulation (VNS)**+  * **Vagus Nerve Stimulation[(Vagus Nerve Stimulation [[https://epilepsysociety.org.uk/about-epilepsy/treatment/vagus-nerve-stimulation]])] (VNS)**
   * **Deep Brain Stimulation (DBS)**   * **Deep Brain Stimulation (DBS)**
   * **Responsive Neurostimulation (RNS)**   * **Responsive Neurostimulation (RNS)**
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 ==== Dietary Therapies ==== ==== Dietary Therapies ====
-Specific dietary modifications have proven effective, especially in children:+Specific dietary modifications have proved effective, especially in children:
  
   * **Ketogenic Diet**: A high-fat, low-carbohydrate diet.   * **Ketogenic Diet**: A high-fat, low-carbohydrate diet.
   * **Modified Atkins Diet**   * **Modified Atkins Diet**
   * **Low Glycaemic Index Treatment**   * **Low Glycaemic Index Treatment**
 +
 +=== Ketogenic Diet ===
 +The ketogenic diet is a high-fat, low-carbohydrate, and adequate-protein diet that shifts the body’s primary fuel source from glucose to fats. This process, known as ketosis, involves the liver converting fats into ketones, which become the brain’s main energy source. Ketones are believed to have neuroprotective effects, stabilising neurons and enhancing brain energy metabolism, which can reduce the excitability of the neurons responsible for seizures.
 +
 +The exact mechanism by which this works for epilepsy is not fully understood, but it is believed that ketones alter neurotransmitter activity, increase mitochondrial energy production, and modulate the production of glutamate (a neurotransmitter linked to excitatory neural activity). The reduction in excitatory neurotransmission and enhancement of inhibitory pathways, such as the GABAergic system, may help prevent seizures.
 +
 +This diet has been particularly effective for children with drug-resistant epilepsy and certain epileptic syndromes, such as Dravet syndrome and Lennox-Gastaut syndrome.
 +
 +=== Modified Atkins Diet ===
 +The Modified Atkins Diet (MAD) is a less restrictive yet similarly effective version of the ketogenic diet. It allows more protein and carbohydrates than the classical ketogenic diet but still encourages ketosis by limiting carbohydrates and promoting fat as the primary fuel source.
 +
 +Like the ketogenic diet, the MAD works by inducing ketosis, which reduces the brain’s reliance on glucose for energy and utilises ketones instead. Ketones have been shown to stabilise neuronal membranes, reduce neural excitability, and enhance inhibitory neurotransmission, similar to the ketogenic diet's effects. This diet is more flexible, making it easier for patients to follow while still providing significant seizure control, especially in adolescents and adults.
 +
 +=== Low Glycaemic Index Treatment (LGIT) ===
 +The Low Glycaemic Index Treatment (LGIT) diet focuses on controlling blood sugar levels by consuming carbohydrates that have a low glycaemic index (GI), meaning they are digested and absorbed more slowly, resulting in a more gradual increase in blood glucose.
 +
 +The mechanism behind its effectiveness in epilepsy is thought to be linked to more stable blood glucose and insulin levels. Stable glucose reduces neuronal hyperexcitability, while avoiding spikes in blood sugar and insulin may prevent metabolic disturbances that could trigger seizures. Like the ketogenic and modified Atkins diets, LGIT may also induce mild ketosis, but the primary focus is on stabilising blood glucose levels, which can have a stabilising effect on the brain.
 +
 +In conclusion, these diets modify brain metabolism in ways that are believed to decrease neuronal excitability, stabilise energy production, and alter neurotransmitter function, all of which are thought to contribute to their anti-seizure effects. While the exact mechanisms continue to be studied, their efficacy, particularly in children with drug-resistant epilepsy, has been well documented.
  
 ==== Psychosocial Interventions ==== ==== Psychosocial Interventions ====
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   * **Enhancement of Quality of Life**   * **Enhancement of Quality of Life**
  
-==== Regular Follow-up ====+==== Regular Follow-Up ====
 Monitoring and adjusting treatment over time is necessary due to: Monitoring and adjusting treatment over time is necessary due to:
  
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   * **Changes in Patient's Condition**   * **Changes in Patient's Condition**
  
-Management must be individualised and often requires a multi-disciplinary approach. Regular review and adaptation to the patient's changing needs are essential for optimal outcomes.+Management must be individualised and often requires a multidisciplinary approach. Regular review and adaptation to the patient's changing needs are essential for optimal outcomes.
  
 The continuous evolution of precision medicine and ongoing research promise more targeted and effective treatments for epilepsy. The continuous evolution of precision medicine and ongoing research promise more targeted and effective treatments for epilepsy.
  
-====== Online Resources for Epilepsy ======+===== Online Resources for Epilepsy =====
  
-This list provides current online resources for individuals with epilepsy and healthcare professionals managing epilepsy, across both the USA and UK.+This list provides current online resources for individuals with epilepsy and healthcare professionals managing epilepsy across both the USA and UK.
  
 ==== For Patients and Therapists in the UK ==== ==== For Patients and Therapists in the UK ====
  
   * **Epilepsy Society**   * **Epilepsy Society**
-    * Offers support, confidential helpline, information on living with epilepsy, safety, and free resources like ‘I have epilepsy’ cards.+    * Offers support, confidential helpline, information on living with epilepsy, safety, and free resources such as ‘I have epilepsy’ cards.
     * [[https://www.epilepsysociety.org.uk|Epilepsy Society Website]]     * [[https://www.epilepsysociety.org.uk|Epilepsy Society Website]]
  
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   * **Epilepsy Self-Management Programs & Resources**   * **Epilepsy Self-Management Programs & Resources**
-    * Encourages self-care and consistent routines to minimize seizure risk, part of AES resources.+    * Encourages self-care and consistent routines to minimise seizure risk and forms part of the AES resources.
     * [[https://www.aesnet.org|AES Self-Management]]     * [[https://www.aesnet.org|AES Self-Management]]
  
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   * **AES eModules**   * **AES eModules**
-    * Self-paced online courses for enhancing knowledge on epilepsy.+    * Self-paced online courses to enhance knowledge of epilepsy.
     * [[https://www.aesnet.org|AES eModules]]     * [[https://www.aesnet.org|AES eModules]]
  
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     * [[https://www.aesnet.org|AES Clinical Guidance]]     * [[https://www.aesnet.org|AES Clinical Guidance]]
  
- +----
  
  • Last modified: 2023/11/07 12:07
  • by andrewtaustin