A 14-year-old boy, affected by Angelman syndrome and epilepsy, was seizure-free for five years. The repetitive tactile stimulation of the four limbs induced tapping-evoked spikes contralaterally to the stimulation side (figure 1). Somatosensory or tapping-evoked spikes were originally described in normal children and in children suffering from idiopathic epilepsy with rolandic spikes as "extreme somatosensory evoked potentials” (De Marco and Tassinari, 1981). They have also been observed in conditions characterized by cortical hyper-excitability, such as epilepsy associated with Fragile X syndrome and in Rettsyndrome (Musumeci et al., 1994; Guerrini et al., 1998). This phenomenon has never been described in Angelman syndrome. Our observation supports the hypothesis that a GABAergic dysfunction underlies this syndrome, leading to a cortico-thalamic hypersynchronismwith subsequent alteration in processing of sensory inputs (Handforth et al., 2005).

“Tapping-evoked spikes” in a patient with Angelman syndrome

CANTALUPO, Gaetano;
2015-01-01

Abstract

A 14-year-old boy, affected by Angelman syndrome and epilepsy, was seizure-free for five years. The repetitive tactile stimulation of the four limbs induced tapping-evoked spikes contralaterally to the stimulation side (figure 1). Somatosensory or tapping-evoked spikes were originally described in normal children and in children suffering from idiopathic epilepsy with rolandic spikes as "extreme somatosensory evoked potentials” (De Marco and Tassinari, 1981). They have also been observed in conditions characterized by cortical hyper-excitability, such as epilepsy associated with Fragile X syndrome and in Rettsyndrome (Musumeci et al., 1994; Guerrini et al., 1998). This phenomenon has never been described in Angelman syndrome. Our observation supports the hypothesis that a GABAergic dysfunction underlies this syndrome, leading to a cortico-thalamic hypersynchronismwith subsequent alteration in processing of sensory inputs (Handforth et al., 2005).
2015
tapping evoked spikes, tapping, Angelman syndrome, GABA
File in questo prodotto:
File Dimensione Formato  
2015 - Cantalupo et al. - Tapping-Evoked Spikes in AS - Epileptic Disorders_full.pdf

non disponibili

Tipologia: Altro materiale allegato
Licenza: Accesso ristretto
Dimensione 3.2 MB
Formato Adobe PDF
3.2 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
2015 - Cantalupo et al. - Tapping-Evoked Spikes in AS - Epileptic Disorders.pdf

non disponibili

Tipologia: Versione dell'editore
Licenza: Accesso ristretto
Dimensione 43.05 kB
Formato Adobe PDF
43.05 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/953323
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact