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Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia
Published on: January 27, 2018
Transient idiopathic dystonia in infancy
Rita Calado1, José Paulo Monteiro, Maria José Fonseca
1Hospital do Espírito Santo, Évora - EPE.
Insights
Transient idiopathic dystonia in infants presents with asymmetric limb symptoms before six months, often mistaken for cerebral palsy. This condition resolves spontaneously without lasting effects, highlighting the importance of accurate diagnosis.
Area of Science:
- Pediatric Neurology
- Developmental Neuroscience
Background:
- Transient idiopathic dystonia (TID) is a rare condition presenting in early infancy.
- It is characterized by temporary, involuntary muscle contractions affecting posture and movement.
- Distinguishing TID from more severe neurological disorders like hemiplegic cerebral palsy is clinically challenging.
Purpose of the Study:
- To enhance understanding of transient idiopathic dystonia.
- To analyze the frequency, characteristics, and clinical course of TID.
- To differentiate TID from other pediatric neurological conditions.
Main Methods:
- Retrospective review of pediatric neurology cases diagnosed with TID.
- Analysis of clinical files, photographic records, and physician-updated information.
- Study period: February 2001 to June 2009.
Main Results:
- Thirteen infants diagnosed with TID were identified over an 8-year period.
- Symptoms included asymmetric tone, posture, and upper limb movements, with onset before six months.
- All cases showed spontaneous resolution without sequelae, despite initial suspicion of hemiplegic cerebral palsy.
Conclusions:
- Transient changes in tone, posture, and movement are observable in early infancy.
- Accurate diagnosis relies on detailed history and neurological examination.
- The pathophysiology of TID remains unknown, with potential links to neurotransmitter imbalance and synaptogenesis.
Aim:
Review of transient idiopathic dystonia cases to improve knowledge on this entity, in relation to frequency, characterization and evolution.
Methods:
Retrospective review and characterization of clinical cases seen in paediatric neurology consultation, diagnosed with transient idiopathic dystonia, between February 2001 and June 2009, using clinical files complemented with photographic records and updated information through the physician.
Results:
Thirteen infants were referred to the paediatric neurology consultation over a period of 8 years, for asymmetric tone, posture and movements of the upper limb with onset before 6 months, with spontaneous favourable evolution and disappearance without sequelae, although the reason for referral was, in most cases, the suspicion of a hemiplegic cerebral palsy.
Conclusion:
Transient changes of tone, posture and movement can be observed during the first months of life. Differential diagnosis is extensive and complex, based on a careful history and neurological examination. Distinction between neurological, neuromuscular and orthopaedic pathology is difficult, particularly at the onset of clinical manifestations. The cases presented are similar to those previously reported by Willemse and Deonna, classified as transient idiopathic dystonia of childhood. Pathophysiology is unknown; some findings support a genetic susceptibility to functional imbalance in brain neurotransmitters and synaptogenesis.
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