Related Experiment Video
Updated: Aug 9, 2026
Preterm EEG: A Multimodal Neurophysiological Protocol
Published on: February 18, 2012
Maturation of the cortical evoked response to posterior-nerve stimulation in the preterm neonate
Insights
Short-latency somatosensory evoked potentials (SSEPs) in preterm infants show a linear decrease in P1 latency with gestational age. This neurophysiological measure may predict later motor disorders in infants.
Area of Science:
- Neurophysiology
- Neonatal Medicine
- Developmental Neuroscience
Background:
- Short-latency somatosensory evoked potentials (SSEPs) assess the integrity of the somatosensory pathway.
- Preterm infants are at risk for neurological complications, including those affecting motor development.
Purpose of the Study:
- To establish normative data for the P1 component latency of SSEPs in preterm infants.
- To investigate the relationship between gestational age and SSEP latency.
- To explore the potential of SSEPs as an early indicator of motor disorders.
Main Methods:
- Stimulation of the posterior tibial nerve at the ankle.
- Recording of short-latency somatosensory evoked potentials (SSEPs).
- Analysis of the first cortical component (P1) latency in 75 preterm infants (27 weeks gestation to term).
Main Results:
- Normative data for P1 latency were established.
- A linear decrease in P1 latency was observed with increasing gestational age.
- The somatosensory pathway is vulnerable to ischemic and hemorrhagic lesions in neonates.
Conclusions:
- SSEP P1 latency demonstrates a clear developmental trajectory in preterm infants.
- Abnormalities in SSEPs may correlate with later motor impairments.
- SSEPs offer a potential tool for early detection of neurological dysfunction in high-risk infants.
Abstract:
Short-latency somatosensory evoked potentials elicited by stimulation of the posterior tibial nerve at the ankle were studied in 75 preterm infants. Normative data for the latency of the first cortical component (P1) were obtained for infants from 27 weeks gestation to term, and showed a linear decrease with increasing gestational age. As the pathway of this response traverses areas of the brain likely to be affected by ischaemic and haemorrhagic lesions, abnormalities in the response might indicate later motor disorder.
