Atonic seizure
Atonic seizure is a type of motor seizure characterized by a sudden loss or diminution of muscle tone without apparent preceding myoclonic or tonic event lasting about 1 to 2 seconds, involving head, trunk, jaw, or limb musculature.
Also called: Astatic seizure, Astatic seizures, Atonic seizures, Drop attacks, Drop seizures, Hypotonic seizure, Hypotonic seizures, Sudden loss of muscle tone.
Conditions associated with atonic seizure
The following conditions have been associated with atonic seizure in medical literature. This is informational and not a diagnosis.
3-phosphoglycerate dehydrogenase deficiency, infantile/juvenile form
3-phosphoglycerate dehydrogenase deficiency, infantile/juvenile form is a medical condition that may be associ...
Alacrimia-choreoathetosis-liver dysfunction syndrome
Alacrimia-choreoathetosis-liver dysfunction syndrome is a medical condition that may be associated with variou...
Angelman syndrome
Angelman syndrome is a medical condition that may be associated with various symptoms and signs....
Bilateral generalized polymicrogyria
Bilateral generalized polymicrogyria is a medical condition that may be associated with various symptoms and s...
DPM1-CDG
DPM1-CDG is a medical condition that may be associated with various symptoms and signs....
DYRK1A-related intellectual disability syndrome due to 21q22.13q22.2 microdeletion
DYRK1A-related intellectual disability syndrome due to 21q22.13q22.2 microdeletion is a medical condition that...
Developmental and epileptic encephalopathy 122
Developmental and epileptic encephalopathy 122 is a medical condition that may be associated with various symp...
Developmental and epileptic encephalopathy with spike-wave activation in sleep
Developmental and epileptic encephalopathy with spike-wave activation in sleep is a medical condition that may...
Early infantile developmental and epileptic encephalopathy
Early infantile developmental and epileptic encephalopathy is a medical condition that may be associated with ...
Epilepsy with eyelid myoclonia
Epilepsy with eyelid myoclonia is a medical condition that may be associated with various symptoms and signs....
Epilepsy with myoclonic-atonic seizures
Epilepsy with myoclonic-atonic seizures is a medical condition that may be associated with various symptoms an...
Folinic acid-responsive seizures
Folinic acid-responsive seizures is a medical condition that may be associated with various symptoms and signs...
Genetic epilepsy with febrile seizure plus
Genetic epilepsy with febrile seizure plus is a medical condition that may be associated with various symptoms...
Hemimegalencephaly
Hemimegalencephaly is a medical condition that may be associated with various symptoms and signs....
Hyperprolinemia type 2
Hyperprolinemia type 2 is a medical condition that may be associated with various symptoms and signs....
Jeffries-Lakhani neurodevelopmental syndrome
Jeffries-Lakhani neurodevelopmental syndrome is a medical condition that may be associated with various sympto...
Kleefstra syndrome 1
An autosomal dominant non-syndromic intellectual disability that has material basis in an autosomal dominant m...
Lafora disease
Lafora disease is a medical condition that may be associated with various symptoms and signs....
Lennox-Gastaut syndrome
Lennox-Gastaut syndrome is a medical condition that may be associated with various symptoms and signs....
Lissencephaly due to LIS1 mutation
Lissencephaly due to LIS1 mutation is a medical condition that may be associated with various symptoms and sig...
PCDH19 clustering epilepsy
PCDH19 clustering epilepsy is a medical condition that may be associated with various symptoms and signs....
Pitt-Hopkins like syndrome 1
Pitt-Hopkins like syndrome 1 is a medical condition that may be associated with various symptoms and signs....
Pyridoxine-dependent-developmental and epileptic encephalopathy
Pyridoxine-dependent-developmental and epileptic encephalopathy is a medical condition that may be associated ...
STXBP1-related encephalopathy
STXBP1-related encephalopathy is a medical condition that may be associated with various symptoms and signs....
Spinal muscular atrophy-progressive myoclonic epilepsy syndrome
Spinal muscular atrophy-progressive myoclonic epilepsy syndrome is a medical condition that may be associated ...
X-linked intellectual disability, Cantagrel type
An X-linked syndromic intellectual disability characterized by marked neonatal hypotonia, progressive quadripa...
developmental and epileptic encephalopathy 103
developmental and epileptic encephalopathy 103 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 108
developmental and epileptic encephalopathy 108 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 109
developmental and epileptic encephalopathy 109 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 114
developmental and epileptic encephalopathy 114 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 119
A developmental and epileptic encephalopathy caused by the variants in the RNU2-2 gene, in which most reported...
developmental and epileptic encephalopathy 120
developmental and epileptic encephalopathy 120 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 94
An idiopathic generalized epilepsy characterized by onset of multiple seizure types in the first few years of ...
developmental and epileptic encephalopathy, 19
Any early infantile epileptic encephalopathy in which the cause of the disease is a mutation in the GABRA1 gen...
developmental and epileptic encephalopathy, 31A
Any developmental and epileptic encephalopathy in which the cause of the disease is a heterozygous mutation in...
developmental and epileptic encephalopathy, 6A
Any early infantile epileptic encephalopathy in which the cause of the disease is a mutation in the SCN1A gene...
developmental and epileptic encephalopathy, 74
developmental and epileptic encephalopathy, 74 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy, 9
Female restricted epilepsy with intellectual disability is a rare X-linked epilepsy syndrome characterized by ...
developmental delay with or without epilepsy
developmental delay with or without epilepsy is a medical condition that may be associated with various sympto...
epilepsy, early-onset, 3, with or without developmental delay
epilepsy, early-onset, 3, with or without developmental delay is a medical condition that may be associated wi...
Tests providers may use to investigate atonic seizure
When investigating atonic seizure, a healthcare provider may order one or more of the following laboratory tests. Test selection is a clinical decision made by a qualified professional.
CBC with Differential
Measures red blood cells, white blood cells, and platelets to help evaluate overall health and detect disorder...
Comprehensive Metabolic Panel (CMP)
Measures 14 substances in the blood to assess kidney and liver function, electrolyte balance, and blood sugar ...
Urinalysis
Examines urine content to help detect urinary tract infections, kidney disease, and diabetes....
Symptoms commonly seen alongside atonic seizure
Depression
Frequently experiencing feelings of being down, miserable, and/or hopeless; struggling to recover from these m...
Dysphagia
Difficulty in swallowing....
Fever
Body temperature elevated above the normal range....
Headache
Cephalgia, or pain sensed in various parts of the head, not confined to the area of distribution of any nerve....
Muscle weakness
Reduced strength of muscles....
Seizure
A seizure is an intermittent abnormality of nervous system physiology characterized by a transient occurrence ...
When to seek care
Seek care from a qualified healthcare provider if atonic seizure is severe, persistent, worsening, or accompanied by concerning symptoms. If you think you have a medical emergency, call your local emergency number immediately.
Frequently Asked Questions
What does the symptom atonic seizure mean?
Atonic seizure is a health sign or symptom described in medical literature. Atonic seizure is a type of motor seizure characterized by a sudden loss or diminution of muscle tone without apparent preceding myoclonic or tonic event lasting about 1 to 2 seconds, involving head, trunk, jaw, or limb musculature.
Which conditions are associated with atonic seizure?
Atonic seizure has been reported in association with 48 conditions in the medical literature we index, including 3-phosphoglycerate dehydrogenase deficiency, infantile/juvenile form, Alacrimia-choreoathetosis-liver dysfunction syndrome, Angelman syndrome, Bilateral generalized polymicrogyria, DPM1-CDG. These associations do not mean you have any of these conditions.
Should I see a doctor about atonic seizure?
You should discuss any persistent or concerning symptoms with a qualified healthcare provider. This website does not provide diagnosis. If you have severe symptoms or signs of a medical emergency, seek care immediately.