Le scoperte potrebbero essere utili per le persone che hanno disordini del sonno

Durante il sonno il corpo è come ‘paralizzato’

di oggisalute | 17 luglio 2012 | pubblicato in Ricerca
foto

All’origine del blocco dei muscoli che si manifesta durante il sonno Rem ci sarebbero due potenti sistemi chimici cerebrali che lavorano insieme. La scoperta dell’Università di Toronto, pubblicata sulla rivista ‘Journal of Neuroscience’ potrebbe migliorare la comprensione e il trattamento dei disturbi del sonno, inclusa la narcolessia e il digrignamento notturno dei denti.

Durante la fase Rem, quella in cui avviene la maggior parte dell’attività onirica, gli occhi continuano a muoversi ma i muscoli del corpo sono fermi, potenzialmente per prevenire gli infortuni. Gli scienziati hanno ora scoperto che la glicina e l’acido gamma-aminobutirico, due neurotrasmettitori, inibiscono le cellule del cervello che sono specializzate nell’attivare i muscoli del corpo.

Prima si riteneva che fosse solo la glicina a svolgere questo ruolo. Le scoperte potrebbero essere utili soprattutto per le persone che hanno disordini del sonno Rem, come coloro che si muovono durante i sogni, cosa che potrebbe essere un precoce indicatore di malattie neurodegenerative come il Parkinson.

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