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Las células ciliadas del pez perro sienten la presión hidrostática

Peter J Fraser¹, Richard L Shelmerdine

¹Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, UK. p.fraser@abdn.ac.uk

|February 2, 2002

Resumen

Las células ciliadas vestibulares del pez perro son sensibles a la presión hidrostática, lo que influye en su actividad y respuesta al movimiento. Esta sensibilidad ayuda a explicar cómo los peces sin vejiga natatoria detectan cambios de presión para la regulación de la profundidad.

Área de la Ciencia:

Biología Marina Biología Marina.
La neurociencia es la neurociencia.
Fisiología Sensorial Fisiología Sensorial.

Sus antecedentes:

Los invertebrados marinos y los peces utilizan la presión hidrostática para la regulación de la profundidad y la sincronización del comportamiento con los ciclos de marea.
Las células ciliadas vestibulares son receptores sensoriales cruciales en los vertebrados, pero su respuesta a la presión hidrostática no se entiende completamente.

Objetivo del estudio:

Para investigar el impacto de la presión hidrostática en las células ciliadas vestibulares en el pez perro (Scyliorhinus canicula).
Para determinar si la presión hidrostática modula la actividad espontánea y la respuesta a la aceleración angular de estas células sensoriales.

Principales métodos:

Registros electrofisiológicos de las células ciliadas vestibulares del laberinto del pez perro.
Aplicación de cambios controlados de presión hidrostática durante los registros.

Principales resultados:

La presión hidrostática modula significativamente la velocidad de disparo espontáneo de las células ciliadas vestibulares del pez perro.
Los cambios de presión alteran las características de respuesta de las células ciliadas a los estímulos de aceleración angular.

Conclusiones:

Las células ciliadas vestibulares en los peces poseen una sensibilidad a la presión hidrostática.
Esta sensibilidad a la presión puede contribuir a la baja actividad en reposo observada en las células ciliadas de los vertebrados.
Proporciona un mecanismo para que los peces de vejiga que no nadan perciban señales hidrostáticas para la navegación ambiental.

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