lunes, 1 de diciembre de 2008
El Bostezo
Siempre me ha parecido curioso el fenómeno del bostezo. Pudiendo coger aire con normalidad, algo que no controlamos nos hace abrir la boca como un tragabolas con el mismo objetivo. El mecanismo por el que se produce está en vías de ser completamente explicado, pero cuesta entenderlo a menos que seas neurólogo y (eso me dijo uno) ni con esas. El motivo del bostezo no está explicado. Parece ser que bostezamos cuando tenemos que estar alerta en situaciones pasivas (1), pero también con el hambre, tomando ciertos medicamentos y, lo más bonito, cuando alguien nos lo contagia. ¿Por qué se pegan los bostezos? Pues de esto aún se sabe menos. Lo único que he leído en lo que se mojan viene a decir que por empatía(2). Y no me parece mala explicación. Seguro que es así.
Finalmente tres cosas que he aprendido buscando la información que no he encontrado:
1. Sólo bostezan los seres que pueden reconocerse en un espejo (¿?)(1)
2. A los niños de menos de dos años no se les pegan los bostezos (¿me lo confirma alguien?)
3. El dinero de los contribuyentes también se emplea en este tema: Existe un estudio publicado en el que voluntarios veían videos de gente bostezando mientras les realizaban una resonancia magnética. Aburre pensarlo (3).
¿Habéis bostezado leyendo esto? Se supone que sería lo normal.
1. http://jnnp.bmj.com/cgi/content/full/77/1/3
2. http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=15820652&dopt=AbstractPlus
3. http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=ShowDetailView&TermToSearch=15670705&ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum
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Vi o lei en su dia que el bostezo se pega por una cuestión de supervivencia. Cuando alguien bosteza, tu cerebro lo identifica con que te esta robando el aire y te hace bostezar para que robes tu el máximo posible. Orange Jews
ResponderEliminarPues como explicación me gusta más que las que he leído. Yo creía que simplemente los estados cercanos al sueño-cansancio, hacían que los mecanismos que hacen que respires se vinieran un poco abajo. De esta forma, el bostezo compensa el poco aire que cogemos por estar cansados. Porque el bostezo es la única inspiración que no va seguida de expiración.
ResponderEliminarya lo podías haber dicho antes (un añito antes), Olmo y Lázaro tiene 3 años y no recuerdo si se les pegaban los bostezos o no.... aunque es verdad que no recuerdo tampoco haberles pegado ninguno.
ResponderEliminarLa situación más curiosa de bostezos que he visto en mi vida(esto creo que ya se lo conté a Mudo) fue el día que salió mi padre de una operación y le dió un ataque de bostezos. Los médicos que estaban por ahí tampoco pudieron explicarlo.
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