Clinical variants of paroxysms
Epilepsy is characterized by a wide spectrum of paroxysmal manifestations. Most patients initially present with only one type of seizure, but as the disease progresses, other forms may join, which also become stereotyped.
The main types of paroxysms include:
- Major convulsive seizures (grand mal).
- Minor seizures (absences, petit mal).
- Dysphorias — sudden mood disturbances.
- Twilight states of consciousness, which include fugues, trances, and ambulatory automatisms.
- Paroxysmal perceptual and cognitive disorders, manifesting as hallucinations, delusions, mentism, and sensations of external influence or passivity.
An increase in seizure diversity in a single patient is considered an unfavorable prognostic sign, indicating poor curability of the process.
Altered states of consciousness and impulsive drives
A separate group of paroxysms consists of altered states of consciousness. They can manifest as episodes of derealization and depersonalization, déjà vu and jamais vu phenomena, as well as body schema disturbances.
Important differential diagnostic distinction: unlike classic convulsive seizures or twilight states of confusion, in altered states of consciousness amnesia is never complete.
In addition, irresistible impulsive drives may occur within the framework of the disease:
- Dipsomania (binge drinking).
- Pyromania (compulsive fire-setting).
- Dromomania (fugue state/wandering).
- Kleptomania (compulsive stealing).
Specific personality changes
The course of the disease is accompanied by progressive negative symptoms, which ultimately lead to the formation of a mnestic-intellectual defect — concentric dementia. It is characterized by the loss of the ability to generalize information, memory selectivity, and oligophasia (impoverished vocabulary).
Characteristic personality traits of the patient:
- Emotional sphere and thinking: viscosity, torpidity, and slowness predominate, paradoxically combined with explosiveness, vindictiveness, despotism, and extreme egocentrism.
- Attitude toward daily life and work: patients exhibit exaggerated pedantry and fussiness. They are excessively neat, react painfully to the displacement of items from their habitual places, and perform any work with utmost meticulousness.
- Communication features: speech becomes slow, drawn-out, and oversaturated with unnecessary details. It is extremely difficult for the patient to change the topic, and they constantly try to return to the "undiscussed" issue. With superiors, patients are overtly polite, prone to fawning and gross flattery. They often use their illness to gain social privileges.
- Interests: there is a down-to-earth nature of interests with a fixation on household issues, hypochondria, and a hypertrophied concern for one's own health.
Status epilepticus and psychoses
The most severe urgent condition is status epilepticus. It is a series of repeated grand mal seizures between which the patient does not regain consciousness (remains comatose). In the typical course of the disease, status epilepticus occurs rarely. Most often it is provoked by exposure to additional harmful factors or, which is particularly important, by abrupt withdrawal of anticonvulsant therapy.
In addition to status, the course of the disease can be complicated by epileptic psychoses. They are divided into:
- Acute — may develop directly within the structure of the seizure itself, in the postictal period, or occur spontaneously without a direct connection to the paroxysm.
- Chronic — run a prolonged course and require a separate therapeutic approach.
Briefly: answers to topical questions
How are focal epileptic seizures classified depending on the level of consciousness?
Depending on the level of consciousness, focal (partial) seizures are divided into two main groups.
- Simple focal seizures — occur with full preservation of consciousness.
- Complex focal seizures — occur with altered or impaired consciousness.
What clinical manifestations are characteristic of motor Jacksonian seizures?
Motor Jacksonian seizures are characterized by the development of convulsions against the background of clear consciousness.
Clinical manifestations include:
- Motor phenomena — repetitive movements in one part of the body, turning, twisting, masticatory and postural-tonic movements.
- Jacksonian march — clonic or tonic-clonic convulsions begin in isolated muscles (arm or leg) and sequentially spread to the entire half of the body (for example, from the face to the arm and leg of the same side).
What clinical symptoms are typical for focal seizures originating from the temporal lobe?
Focal seizures originating from the temporal lobe are typically characterized by olfactory hallucinations.
These symptoms occur when the pathological epileptic focus is localized in the cortex of the temporal lobes. In particular, the development of an olfactory aura preceding the seizure indicates the involvement of the uncus in the process. Other manifestations of focal seizures may also be observed in temporal lobe epilepsy, but olfactory disturbances are specifically indicated as a characteristic topical sign.
What clinical signs indicate secondary generalization of a focal seizure?
Loss of consciousness and the development of clonic-tonic convulsions indicate secondary generalization of a focal seizure. Secondary generalization occurs when initially local epileptic activity spreads to the entire brain.
What types of epileptic aura are distinguished in clinical practice?
The following types of epileptic aura are distinguished:
- Olfactory — associated with a focus in the uncus.
- Visual — associated with a focus in the occipital lobes.
- Somatomotor — associated with the postcentral gyrus.
- Auditory.
- Psychic — manifests as paroxysmal changes in mental state.
Class and exam questions
What is concentric dementia?
This is a specific mnestic-intellectual defect in epilepsy characterized by the loss of the ability to generalize, selectivity of memory, and speech poverty (oligophasia).
What are the main causes of status epilepticus?
In a typical course, it occurs rarely. The main triggers are additional external detrimental factors and abrupt withdrawal of anticonvulsant drugs.
What else to study on this topic
- Pathogenesis and management algorithm for status epilepticus.
- Differential diagnosis of acute and chronic epileptic psychoses.
- Mechanisms of concentric dementia and oligophasia formation.
- Clinical differences between ambulatory automatisms and trances and fugues.
- Pharmacological principles: why abrupt drug withdrawal is dangerous.
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