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La actividad refleja diferencial determina la asimetría de las garras y los músculos más cercanos en el desarrollo de
Science (New York, N.Y.)
|July 18, 1986
Resumen
La lateralidad de la garra de langosta, trituradora o cortadora, está determinada por la actividad refleja diferencial en el sistema nervioso central durante el desarrollo temprano. Una mayor actividad en un lado dicta que se convierta en la garra del triturador.
Área de la Ciencia:
- Biología marina Biología marina.
- La neurociencia es la neurociencia.
- Biología del desarrollo Biología del desarrollo.
Sus antecedentes:
- Las garras emparejadas de la langosta americana (Homarus americanus) al principio parecen idénticas.
- Estas garras luego se diferencian en una garra trituradora (fibras musculares lentas) y una garra cortadora (fibras musculares rápidas).
Objetivo del estudio:
- Para investigar el mecanismo de desarrollo que determina la lateralidad de las garras en las langostas.
- Comprender el papel del sistema nervioso central y la actividad refleja en la diferenciación de las garras.
Principales métodos:
- Análisis comparativo de la morfología de las garras y los tipos de fibras musculares en langostas juveniles.
- Manipulación experimental de sustratos de cría y ejercicio de garras.
- Observación de la actividad refleja diferencial en garras emparejadas.
Principales resultados:
- La lateralidad de las garras se establece en la etapa posjuvenil, con la aparición de distintos tipos de trituradoras y cortadoras.
- Los factores ambientales como el sustrato y el ejercicio influyen en la diferenciación de las garras.
- La actividad refleja diferencial en el sistema nervioso central se correlaciona con el destino del triturador / cortador.
Conclusiones:
- La lateralidad de las garras en las langostas es un proceso de desarrollo neurológico.
- El lado que exhibe una mayor actividad refleja se desarrolla en la garra del triturador.
- El lado contralateral con menor actividad se convierte en la garra cortadora.
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