Wetenschappers kweken stotterende muizen

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Het is niet de bedoeling om hier therapieën te promoten !

Wetenschappers kweken stotterende muizen

Berichtdoor phunkinit2 » di 19 jul 2016, 10:13

Amerikaanse wetenschappers zijn erin geslaagd om stotterende muizen te kweken.

De muizen zijn door middel van genetische modificatie uitgerust met het gen Gnptab, dat bij mensen is gelinkt aan de neiging tot stotteren.

De muizen die het gen dragen, maken minder geluid dan hun gezonde soortgenoten en piepen met relatief veel tussenpauzes.

Dat hebben Amerikaanse wetenschappers bekendgemaakt op de conferentie Neuroscience 2015


De onderzoekers analyseerden het gepiep van de genetisch gemodificeerde muizen met behulp van speciale software die ook menselijk gestotter kan herkennen aan het langzame spreektempo en het grote aantal pauzes. ​Dat meldt de nieuwssite van het wetenschappelijk tijdschrift Science.

Stotterende mensen stoten in een minuut gemiddeld negentig verschillende klanken uit, terwijl niet-stotterende mensen er 125 produceren.

Uit het nieuwe onderzoek blijkt dat de genetisch gemodificeerde muizen tachtig klanken produceren per drieënhalve minuut, terwijl hun 'normale' soortgenoten in die tijd 190 vocalisaties uitstoten. Kortom: de dieren lijken te stotteren door het gen Gnptab.


De nieuwe bevindingen kunnen wetenschappers mogelijk helpen om de oorzaak van gestotter bij mensen beter in kaart te brengen.

Het 'stottergen' Gnptab werd vorig jaar ontdekt door neurowetenschapper Dennis Drayna van het US Institute of Deafness and Other Communication Disorders.

Drayna vermoedt dat stotteren slechts gedeeltelijk wordt veroorzaakt door erfelijke factoren. "Op basis van een ruwe schatting denk ik dat ongeveer de helft van al het gestotter bij mensen wordt veroorzaakt door dingen die overerfelijk zijn", verklaarde hij vorig jaar in de Britse krant The Guardian.

Ongeveer vijf procent van alle kinderen stottert regelmatig. Bij het merendeel gaat de stoornis vanzelf over. Wereldwijd stottert ongeveer 1 procent van alle volwassenen.

Door: NU.nl/Dennis Rijnvis
bron : http://www.nu.nl/wetenschap/4149105/wet ... izen-.html
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Geregistreerd: zo 05 apr 2015, 10:45

while Tyus Jones tallied 15 points

Berichtdoor zft123 » di 03 jul 2018, 11:11

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Kubiak said injuries to left tackle Duane Brown (ankle), running back Arian Foster (hamstring) and Ben Tate (ribs) arent serious. Tate was injured in the third quarter on Sunday but returned and finished the game. He told The Associated Press on Monday that he has four broken ribs. He was in a lot of pain, even wincing when he took off his sweatshirt, but said that he expects to be ready to play when Houston hosts Indianapolis on Nov. 3. "Ill be OK," he said. Kubiak also said rookies Cierre Wood, Sam Montgomery and Willie Jefferson were released for violating team rules. He wouldnt specify what the players did, but did say it wasnt just one thing. "I make decisions based on a body of work in everything I do," he said. "Ive got five months of work invested with those three young men and I made a decision today to move forward. Weve got some things we need to address as a football team." 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