These seizures do not cause life-threatening issues but they often fail to respond properly to medications.
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Nearly 60 to 65% people experiencing laughing seizures may have cognitive issues. These seizures are increasingly linked with behaviour issues such as anxiety, aggression, or mood disorders.
Seizures can be described as periods of irregular electrical movements in the brain that can lead to changes in behaviour, consciousness, memory, and physical movements. Gelastic seizures (GS), popularly known as laughing seizures, can be categorized as uncontrolled periods of laughing or giggling. These seizures occur for brief period and most commonly affect children. The rare type of epilepsy includes a abrupt burst of energy. The seizures are quite instant and may last approximately 2 to 30 seconds. They may occur several times a day. Several people reporting getting 5 to 100 laughing seizures per day.
According to a study featured in National Library of Medicine, “GS start in infancy in over one third of patients. Neonatal onset of seizures is widely reported, as early as the first day. GS usually occur with high frequency and periodicity, especially in children.” 1
It is worth noting that the uncontrolled laughter in laughing seizures takes place in the absence of jokes, joy, and happiness. These seizures are rare focal seizures that starts in one part of the brain as against the generalised seizures that can occur in the entire brain.
According to a report featured in healthline, one third of gelastic seizures have been linked to hypothalamic hamartoma, a non-cancerous tumor near the hypothalamus. Hypothalamus is a part of the brain that several key functions such as hormone and temperature control. Meanwhile, another one-third has been linked with lesions in the frontal or parietal lobes. 2
These seizures do not cause life-threatening issues but they often fail to respond properly to medications. They have been linked to other health issue that may impact the quality of life of children. Nearly 60 to 65% people experiencing these seizures may have cognitive issues. These seizures are increasingly linked with behaviour issues such as anxiety, aggression, or mood disorders.
A large number of children getting these seizures may experience early puberty as a result of over-secretion of gonadotropin-releasing hormone and luteinizing hormone. Many individuals getting these seizures may also witness other kinds of seizures.
The major symptoms of such seizures will be uncontrolled episodes of laughter that may last anywhere between 2 to 30 seconds. The laughter bursts can take place several times a day and may frequently have high frequency. When an individual experiencing gelastic seizure laughs, it may appear forced and abnormal.
The common symptoms may include grunting, facial flushing, pupil dilation, mumbling, and lip smacking. When babies and children get these seizures, they may grunt or squirm in a different manner with laughter stopping abruptly. They may feel confused and exhausted the moment the seizure comes to an end.
“Most of the time, gelastic seizures are associated with a noncancerous mass found in your hypothalamus at birth called a hypothalamic hamartoma. But they can also arise from masses in your frontal or temporal lobes,” added the healthline report. 2 Malformation in the brain’s cortex, especially in frontal or temporal lobes can also cause gelastic seizure. Tuberous sclerosis can also cause such seizures which is a genetic condition that causes non-cancerous tumours to develop in the brain and other organs.
The other potential causes of these seizures include cerebral infarction or stroke, hippocampal sclerosis, and vascular malformation.
Doctors largely use electroencephalogram or EEG to diagnose gelastic seizures. An EEG assesses the electrical activity of the brain and figures out the abnormal patterns. EEG may display normal or a little unusual activity in some individuals with such seizures especially when are not experiencing the seizures. An MRI scan can help the healthcare professional to figure out hypothalamic hamartoma.
These seizures frequently do not respond to anti-seizure medicine. The doctor may suggest a surgery if the seizures are affecting the quality of life and do not respond to medications. There is a strong likelihood that removal of hypothalamic hamatoma can improve symptoms and behavior issues. There are several surgical techniques available that may include MRI-guided laser ablation, stereotactic radiosurgery, craniotomy, and endoscopic surgery.
FAQs
What differentiates gelastic seizures from other types of seizures?
Gelastic seizures are focal seizures characterized by sudden, uncontrolled episodes of laughter without joy or humor. Unlike generalized seizures that affect the entire brain, gelastic seizures start in specific brain regions like the hypothalamus or frontal lobes. They typically last 2 to 30 seconds and occur frequently, especially in children.
How are gelastic seizures diagnosed by medical professionals?
Doctors diagnose gelastic seizures using electroencephalogram (EEG) to detect abnormal brain electrical activity and MRI scans to identify hypothalamic hamartomas or other brain lesions. EEGs may sometimes show normal activity if the seizure is not occurring during the test, so MRI helps confirm structural causes.
What treatment options are available for gelastic seizures and their effectiveness?
Gelastic seizures often do not respond well to anti-seizure medications. Surgery, especially removal of hypothalamic hamartoma, is considered when seizures significantly affect quality of life. Surgical methods include MRI-guided laser ablation, stereotactic radiosurgery, craniotomy, and endoscopic surgery, which may improve seizure control and behavioral symptoms.
Are there any long-term cognitive or behavioral effects associated with gelastic seizures?
Yes, 60 to 65% of individuals experiencing gelastic seizures may have cognitive impairments along with behavioral issues such as anxiety, aggression, and mood disorders. Early puberty linked to hormone secretion abnormalities is also common in children with these seizures, impacting overall quality of life.
What causes gelastic seizures, and how do these causes affect treatment choices?
Gelastic seizures are most commonly caused by hypothalamic hamartomas, non-cancerous tumors near the hypothalamus, or lesions in the frontal or temporal lobes. Other causes include tuberous sclerosis, cerebral infarction, hippocampal sclerosis, and vascular malformations. Identifying the cause via imaging guides treatment—especially surgical options targeting the tumor or lesion.
National Library of Medicine|Gelastic seizures associated with hypothalamic hamartomas. An update in the clinical presentation, diagnosis and treatment
healthline|Overview of Gelastic Seizures
Disclaimer: This content is for general informational purposes only and should not replace professional medical advice. Always consult a qualified healthcare provider with any questions about your health or treatment options.
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