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TONIC CLONIC / GRAND MAL SEIZURES - EPILEPSY
This vote and comments section applies to those
who suffers from Tonic Clonic aka Grand Mal Seizures / Epilepsy.
Here are some partial quotes:
TONIC CLONIC SEIZURES - from eMed
TONIC CLONIC SEIZURES (GRAND MAL) - Epilepsy Foundation
TONIC CLONIC (GRAND MAL) by Epilepsy.com
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you wish, and you may click on the links above
to learn more in details.
This vote and comments section applies to those
who suffers from Tonic Clonic aka Grand Mal Seizures / Epilepsy.
Here are some partial quotes:
TONIC CLONIC SEIZURES - from eMed
A seizure is an abnormal paroxysmal discharge of cerebral neurons due to cortical hyperexcitability. The International Classification of Seizures divides seizures into 2 categories: partial seizures (ie, focal or localization-related seizures) and generalized seizures.
Partial seizures result from a seizure discharge within a particular brain region or focus, and they manifest focal symptoms. Generalized seizures probably begin in the thalamus and other subcortical structures, but on scalp EEG recordings they may appear to start simultaneously in both cerebral hemispheres; therefore, they manifest symptoms bilaterally in the body and are always associated with loss of consciousness.
Partial seizures can generalize secondarily and result in tonic-clonic activity. Some partial seizures have very rapid generalization, and the partial phase of the seizure may not be readily apparent clinically or even on scalp EEG recordings. However, secondarily generalized partial seizures are not included in the category of generalized seizures, which includes only primary generalized seizures.
Generalized convulsive seizures can be classified as atonic, tonic, clonic, tonic-clonic, myoclonic, or absence on the basis of clinical symptoms and EEG abnormalities. Tonic seizure is the rigid contracture of muscles, including respiratory muscles, which is usually brief. The clonic component is the rhythmic shaking that occurs and is longer. Together, a generalized tonic-clonic seizure (GTCS) is also called a grand mal seizure and is one of the most dramatic of all medical conditions.
Several epilepsy syndromes are associated with generalized epilepsy: benign neonatal convulsions, benign myoclonic epilepsy of infancy, childhood absence epilepsy, juvenile absence epilepsy, juvenile myoclonic epilepsy, and generalized tonic-clonic seizures upon awakening.
Pathophysiology
Generalized epilepsy is thought to be initiated by 3 different mechanisms: (1) abnormal response of hyperexcitable cortex to initially normal thalamic input, (2) primary subcortical trigger, and (3) abnormal cortical innervation from subcortical structures.
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The morbidity and mortality for tonic-clonic seizure is high because these patients get no aura and thus the seizure strikes without warning. Patients can have posterior shoulder dislocations and broken bones. The incidence of sudden death is 24 times higher in persons with epilepsy than in the general population. Some of the risk factors for sudden death in epilepsy (SUDEP) include high seizure frequency (specifically tonic-clonic type), younger age, mental retardation, and polytherapy.
Age
* Generalized convulsive seizures are uncommon in infants and rare in neonates.
* In elderly patients, GTCSs usually are due to secondary generalization of seizures emanating from localized brain lesions.
Physical
The patient may have completely nonfocal findings on neurologic examination when not having seizures. Seizures typically are divided into tonic, clonic, and postictal phases, which are described in detail in this section.
* Tonic phase
o Generalized convulsive seizures may begin with myoclonic jerks or, rarely, with absences. The tonic phase begins with flexion of the trunk and elevation and abduction of the elbows. Subsequent extension of the back and neck is followed by extension of arms and legs. This can be accompanied by apnea, which is secondary to laryngeal spasm.
o Autonomic signs are common during this phase and include increase in pulse rate and blood pressure, profuse sweating, and tracheobronchial hypersecretion.
o Although urinary bladder pressure rises, voiding does not occur because of sphincter muscle contraction.
o This stage lasts for 10-20 seconds.
* Clonic phase
o The tonic stage gives way to clonic convulsive movements, in which the tonic muscles relax intermittently, lasting for a variable period of time.
o During the clonic stage, a generalized tremor occurs at a rate of 8 tremors per second, which may slow down to about 4 tremors per second. This is because phases of atonia alternate with repeated violent flexor spasms. Each spasm is accompanied by pupillary contraction and dilation.
o The atonic periods gradually become longer until the last spasm. Voiding may occur at the end of the clonic phase as sphincter muscles relax. The atonic period lasts about 30 seconds. The patient continues to be apneic during this phase.
o The convulsion, including tonic and clonic phases, lasts for 1-2 minutes.
* Postictal state
o The postictal state includes a variable period of unconsciousness during which the patient becomes quiet and breathing resumes.
o The patient gradually awakens, often after a period of stupor or sleep, and often is confused, with some automatic behavior.
o Headache and muscular pain are common. The patient does not recall the seizure itself.
TONIC CLONIC SEIZURES (GRAND MAL) - Epilepsy Foundation
Generalized Tonic Clonic Seizures (also called Grand Mal or a Convulsion)
'Contrary to popular folk belief, nothing should be placed in the mouth during the seizure. Severe injury could occur.'
Generalized tonic clonic seizures (grand mal seizures) are the most common and best known type of generalized seizure. They begin with stiffening of the limbs (the tonic phase), followed by jerking of the limbs and face (the clonic phase).
During the tonic phase, breathing may decrease or cease altogether, producing cyanosis (blueing) of the lips, nail beds, and face. Breathing typically returns during the clonic (jerking) phase, but it may be irregular. This clonic phase usually lasts less than a minute.
Some people experience only the tonic, or stiffening phase of the seizure; others exhibit only the clonic or jerking movements; still others may have a tonic-clonic-tonic pattern.
Generalized tonic clonic seizures (grand mal seizures) are the most common and best known type of generalized seizure. They begin with stiffening of the limbs (the tonic phase), followed by jerking of the limbs and face (the clonic phase).
During the tonic phase, breathing may decrease or cease altogether, producing cyanosis (blueing) of the lips, nail beds, and face. Breathing typically returns during the clonic (jerking) phase, but it may be irregular. This clonic phase usually lasts less than a minute.
Some people experience only the tonic, or stiffening phase of the seizure; others exhibit only the clonic or jerking movements; still others may have a tonic-clonic-tonic pattern.
Incontinence may occur as a result of the seizure. The tongue or inside of the mouth may be bitten during the episode; breathing afterwards may be noisy and appear to be labored. Contrary to popular belief, nothing should be placed in the mouth during the seizure; turning the patient on one side will help prevent choking and keep the airway clear.
Following the seizure, the patient will be lethargic, possibly confused, and want to sleep. Headache sometimes occurs. Full recovery takes minutes to hours, depending on the individual.
First Aid for Generalized Tonic-Clonic Seizures
* Prevent further injury. Place something soft under the head, loosen tight clothing, and clear the area of sharp or hard objects.
* Do not force objects into the person’s mouth.
* Do not restrain the person’s movements unless they place him or her in danger.
* Turn the person on his or her side to open the airway and allow secretions to drain.
* Stay with the person until the seizure ends.
* Do not pour any liquids into the person’s mouth or offer any food, drink, or medication until he or she is fully awake.
* If the person does not resume breathing after the seizure, start cardiopulmonary resuscitation.
* Let the person rest until he or she is fully awake.
* Be reassuring and supportive when consciousness returns.
* A convulsive seizure is usually not a medical emergency unless it lasts longer than five minutes, or a second seizure occurs soon after the first, or the person is pregnant, injured, diabetic, or not breathing easily. In these situations the person should be taken to an emergency medical facility.
TONIC CLONIC (GRAND MAL) by Epilepsy.com
A tonic-clonic seizure that lasts longer than 5 minutes probably calls for medical help. A seizure that lasts more than 30 minutes, or three seizures without a normal period in between, indicates a dangerous condition called convulsive status epilepticus. This requires emergency treatment.
* Tell me more
This type is what most people think of when they hear the word "seizure." An older term for them is "grand mal." As implied by the name, they combine the characteristics of tonic seizures and clonic seizures. The tonic phase comes first: All the muscles stiffen. Air being forced past the vocal cords causes a cry or groan. The person loses consciousness and falls to the floor. The tongue or cheek may be bitten, so bloody saliva may come from the mouth. The person may turn a bit blue in the face. After the tonic phase comes the clonic phase: The arms and usually the legs begin to jerk rapidly and rhythmically, bending and relaxing at the elbows, hips, and knees. After a few minutes, the jerking slows and stops. Bladder or bowel control sometimes is lost as the body relaxes. Consciousness returns slowly, and the person may be drowsy, confused, agitated, or depressed.
* Who gets them?
They affect both children and adults.
* What's the outlook?
For children who have had a single tonic-clonic seizure, the risk that they will have more seizures depends on many factors. Some children will outgrow their epilepsy. Often, tonic-clonic seizures can be controlled by seizure medicines. Many patients who are seizure-free for a year or two while taking seizure medicine will stay seizure-free if the medicine is gradually stopped. The risk that an individual will have more seizures depends on factors such as whether his or her EEG shows any epilepsy waves, or whether the doctor finds any abnormalities on a neurological exam. Among children with no epilepsy waves and a normal exam, about 70% of those who have had tonic-clonic seizures will stay seizure-free without medication. The comparable number is less than 30% for children with epilepsy waves and an abnormal exam. All these figures are more favorable than those for partial seizures.
* What else could it be?
Some nonepileptic (psychogenic) seizures resemble tonic-clonic seizures. The surest way to tell the difference is with video-EEG monitoring. In some cases, the same person may have both tonic-clonic and nonepileptic seizures.
People who faint sometimes develop tonic or clonic movements. These movements are rarely as intense or prolonged as a tonic-clonic seizure.
* How is the diagnosis made?
The typical appearance of a tonic-clonic seizure is usually easy to recognize. The doctor will want a detailed description of the seizures. An EEG and other tests may help to confirm the diagnosis or suggest a cause.
Topic Editor: Orrin Devinsky, M.D.
Feel free to bring about any discussion as
you wish, and you may click on the links above
to learn more in details.