An animal must use sensory information to inform its decisions about which form of which task to use if it is to achieve its current goal. How these decisions.

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Transcripción de la presentación:

An animal must use sensory information to inform its decisions about which form of which task to use if it is to achieve its current goal. How these decisions are made should be reflected in the neural architecture. At one extreme, decisions about goal, task, and form may be made independently, at separate neural locations. At the other extreme, sensory information could trigger one form of a task directly, with no overt choice about goal or task ever being made. Reflex vs. Serial model of behavioral choice

Simple reflex behaviors Complex- modifiable behaviors

Experimentos en todo el animal, preparaci[on semi-intacta y en ganglios aislados

Cada una de las nueronas de un ganglio está Involucrada en múltiples comportamientos

1A Ganglio subesofágico de la sangüijuela (estereofotomicrografía para ver en 3D!) Command-like neurons in the SEG: initiate or terminate motor patterns (swimming, shortening, crawling?)

R3b1

C(ircular)V motor neuron, ganglio 10: CV 10 Bursts resultan en elongación de la sanguijuela DP 10: nervio, se ven spikes de cell 3 (dorsal longitudinal motor neuron) : contracción fictive crawling Inyección I en R3b1: fictive swimming Qué factores determinan que se haga uno o lo otro?

BAJA SALINA ALTA SALINA INTERMEDIA elongation always precedes contraction

no info on water level

crawling after mechanical stimulation Swimming after mechanical stimulation

Lo que para al animal, hiperpolariza a R3b1

1- moverse 2- cómo moverse!