mar 31

Definition of Epilepsy - Epilepsy is defined by seizures. - Definition of Seizures: - By John Hewings Jackson: - A seizure is an occasional, excessive, and disorderly discharge of nerve tissue on muscles. - Seizures can alter consciousness, sensation, and behavior.
Characteristics of Epilepsy: - Characterized by recurrent unprovoked seizures. - Due to atypical excessive or synchronous neuronal activity in the brain.

Diversity of Seizures: - Seizures vary in presentation, necessitating accurate definitions. - A significant exception to the recurrent unprovoked seizures is the concept of cyclical patterns identified in EEG. - Frequent seizure patients exhibit cyclical patterns in seizure frequency and severity. - Patterns may follow circadian (daily) or circannual (yearly) rhythms or be influenced by stress and sleep.
Self-reported Precipitating Factors: - 50% to 60% of individuals with epilepsy report precipitating factors that exacerbate seizures: - Commonly reported factors: - Stress - Sleep deprivation - Fatigue - Fever - Flashing lights - Alcohol (notably during withdrawal, which can lower seizure threshold).

Epilepsy as a Collection of Conditions: - Epilepsy is best seen as a group of conditions that share abnormal brain discharge, presenting in diverse ways. - Emotional and Behavioral Changes: - Patients often face changes in emotionality and other life aspects between seizures.
Key Terms: - Ictal: Refers to the period during a seizure. - Interictal: Refers to the time between seizures. - Important for understanding seizure activities and patient conditions.

Definition and Instances: - Reflex seizures are those that occur in response to specific stimuli, challenging the notion of unprovoked seizures. - Examples of reflex epilepsies: - Toothbrush Epilepsy: - Seizures triggered by brushing teeth or even the thought of it. - LEGO-Induced Seizures: - Seizures experienced during the act of playing with LEGO bricks. - Thinking Seizures: - Seizures triggered by contemplating the last seizure experience.

Role of EEG: - EEG is crucial for diagnosing epilepsy. - Distinction between: - Seizure: Electrographic activity captured via EEG. - Convulsion: The behavioral manifestation of a seizure.
Video EEG Monitoring: - A comprehensive assessment where patients are monitored in a controlled environment with EEG and video. - Allows for observation of seizures and EEG recordings simultaneously.
EEG Patterns: - Interictal Spike: A indicator of epilepsy when spotted on EEG.

Classification of Seizures: - Two main types: - Focal Seizures: - Electrographic activity localized in one area of the brain. - Generalized Seizures: - Involves activity across the entire brain. - Focal seizures can develop into generalized seizures over time (secondary generalization).
Specific Types of Seizures: - Simple Partial Seizures: - Formerly known as Jacksonian seizures, they do not lead to loss of consciousness. - Can be sensory or motor events without a full convulsive episode. - Complex Partial Seizures: - Involve complex behaviors during the seizure without recollection after the event. - Often originate from temporal lobes and can resemble psychiatric conditions. - Absence Seizures: - Brief lapses in consciousness, typically lasting about 5 to 10 seconds, often misinterpreted as daydreaming. - Common in childhood and could disrupt learning effectively. - Characterized by the spike-and-wave pattern on EEG. - Tonic-Clonic Seizures: - Involve both tonus (muscle rigidity) and clonus (rhythmic movements). - Typically result in loss of consciousness and equilibrium; may include tongue biting or urination.
Generalized vs. Focal Seizures: - Many generalized seizures start as focal seizures. - The distinction may differ at different developmental stages for an individual.

Anticonvulsants: - First-line treatment for many types of seizures; clinical choice influenced by seizure type and focus. - Notable medications: - Valproate - Lamotrigine - Topiramate - Side effects may vary, impacting treatment choice. - Ketogenic Diet: - Low carbohydrate diet, effective for many children with epilepsy, though complex to maintain. - Vagus Nerve Stimulation: - An implanted device that impacts seizure frequency, noted for dual use in managing depression. - Surgery: - Considered when seizures are severely intractable and other treatments fail.

Stigma Surrounding Epilepsy: - Historical context of stigma, linking epilepsy to witchcraft and societal fear. - Modern encounters with public misconceptions and difficulties in providing the needed help during seizures (example incidents).
Comorbidities: - Common coexisting conditions include anxiety and depression, which can overshadow seizure management itself.

Understanding epilepsy requires a comprehensive approach encompassing definitions, diverse seizure types, diagnostic practices, treatments, and recognition of societal implications.