Psychogenic Nonepileptic Seizure

Aka: Psychogenic Nonepileptic Seizure, Psychogenic Seizure, Hysterical Seizure, Pseudoseizure, PNES

II. Epidemiology

  1. Incidence: 1-3 per 100,000
  2. Prevalence: Up to 33 per 100,000
  3. May account for up to 25% of Seizures at Epilepsy centers (ambulatory and inpatient)
  4. Epilepsy patients may also have Psychogenic Seizures in up to 30% of cases
  5. Females account for at two thirds of Psychogenic Seizure patients

III. Causes

  1. Anxiety Disorder
    1. Panic Attacks
    2. Post-Traumatic Stress Disorder
  2. Hypochondriasis
  3. Somatization
  4. Conversion Disorder
  5. Acute stress response

IV. Precautions

  1. Pseudoseizures (or Psychogenic Seizures) are not Malingering
  2. Patients having Psychogenic Seizures typically do not know this is happening

V. Signs

  1. Atypical Seizure motor activity
    1. Asymmetric arm and leg movement
      1. Often non-focal involving opposite arm and leg (e.g. left arm and right leg activity)
      2. Contrast with Seizures which tend to be focal
    2. Pelvic thrusting
    3. Head turning from side to side
    4. Dystonic Posture
    5. Eyes closed and resists Eyelid movement
    6. Tongue biting limited to tip of Tongue
    7. Avoidance during Seizure
  2. Atypical Seizure timing
    1. Gradual onset and last 2-3 minutes (contrast with 1 minute for typical Seizure)
    2. Waxing and waing course (contrast with rhythmic periodicity of Seizure)
    3. Recur frequently
    4. Typically lacks the postictal period of Seizure disorder
  3. Other factors
    1. Resistance to multiple antiepileptic agents
    2. Emotional or situational triggers
    3. Postictal crying
    4. May remember episode (contrast with Seizure where there is no memory of the episode)

VI. Differential Diagnosis

  1. See Nonepileptic Seizure
  2. Atypical epileptic Seizures
    1. Frontal LobeSeizure
      1. Atypical motor and verbal activity
      2. Often occur during sleep and brief duration
    2. Gelastic Seizure (laughs during Seizure)
    3. Myoclonic Seizure

VII. Diagnosis: End-Tidal CO2

  1. Prolonged Seizure
    1. Oxygen Saturation falls
    2. End-Tidal CO2 rises
  2. Prolonged Psychogenic Seizure
    1. Oxygen Saturation remains normal
    2. End-Tidal CO2 remains normal

VIII. Diagnosis: Inpatient Video EEG

  1. Typical Seizure as confirmed by witnesses of Seizure
  2. No corresponding EEG abnormalities
  3. Interrater reliability of EEG monitoring is poor
    1. Benbadis (2009) Neurology 73(11):843-6 [PubMed]

IX. Diagnosis: Clinical findings that do not identify Seizure disorder

  1. Postictal Serum Prolactin
  2. Tongue-biting, self-injury or Incontinence
  3. Psychological Testing
  4. Outpatient Electroencephalogram

X. References

  1. Bright, Shoenberger, Stellpflug in Majoewsky (2013) EM:Rap 13(3):3-4

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Related Studies

Ontology: Dissociative convulsions (C0349245)

Concepts Mental or Behavioral Dysfunction (T048)
ICD10 F44.5
SnomedCT 192425005, 276298008, 191714002
Dutch hysterische aanvallen, pseudo-epilepsie, aanval; hysterisch, convulsief (toeval door hysterie), convulsie; dissociatief, convulsie; hysterie, convulsie; hysterisch, dissociatief; convulsie, hysterie; convulsies, hysterisch; convulsie, hysterisch; toeval, toeval; hysterisch, Dissociatieve convulsies
French Crises d'hystérie, Pseudo-crise épileptique
German hysterische Anfaelle, Dissoziative Krampfanfaelle, Pseudoanfall
Italian Attacchi isterici, Pseudo-crisi convulsiva
Portuguese Ataques histéricos, Pseudo-ataque
Spanish Crisis histéricas, Pseudocrisis, crisis convulsivantes disociativas (trastorno), crisis convulsivantes disociativas, crisis convulsivas disociativas, crisis convulsivas disociativas (trastorno), convulsiones disociativas, crisis histérica
Japanese ヒステリー発作, ﾋｽﾃﾘｰﾎｯｻ, 偽発作, ｷﾞﾎｯｻ
Czech Hysterické záchvaty, Pseudozáchvat
English Hysterical fits, pseudoseizures, hysterical seizures, hysterical seizure, pseudoseizure, Pseudoseizure, Psychogenic seizures, Dissociative convulsions (diagnosis), factitious disorder dissociative convulsions, Dissociative convulsions, Dissociative seizures, Hysterical fit, Hysterical seizures, Pseudoseizures, Dissociative convulsions (disorder), Factitious seizures, Sham seizures, attack; hysterical, convulsive (hysterical seizure), convulsions; dissociative, convulsions; hysteria, convulsions; hysterical, dissociative; convulsions, fit; hysterical, hysteria; convulsions, hysterical; convulsions, hysterical; fit, seizure; hysterical, convulsive (hysterical seizure), seizure; hysterical
Korean 해리성 경련
Hungarian Hysteriás rohamok, Pseudogörcsroham
Derived from the NIH UMLS (Unified Medical Language System)

Ontology: Psychogenic seizure (C1142430)

Concepts Mental or Behavioral Dysfunction (T048)
English psychogenic seizure, psychogenic seizures, Psychogenic seizure
Czech Psychogenní záchvat
Dutch psychogene aanval
French Crise psychogène
German psychogener Krampfanfall
Hungarian Psychogen epilepsiás roham
Italian Crisi convulsiva psicogena
Japanese 心因性発作, ｼﾝｲﾝｾｲﾎｯｻ
Portuguese Ataque psicogénico
Spanish Crisis epiléptica psicógena
Derived from the NIH UMLS (Unified Medical Language System)

Related Topics in Mental Health

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