Control motor del comportamiento

Presentación del tema: "Control motor del comportamiento"— Transcripción de la presentación:

1 Control motor del comportamiento
Seminario 8 Control motor del comportamiento

2 Neurona comando, criterios de identificación:

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13 Simple reflex behaviors Complex- modifiable behaviors

14 Experimentos en todo el animal, preparación semi-intacta y en ganglios aislados

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

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19 Reflex vs. Serial model of behavioral choice
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

20 Ganglio subesofágico de la sangüijuela
Fig1A Ganglio subesofágico de la sangüijuela (estereofotomicrografía para ver en 3D!) Command-like neurons in the SEG: initiate or terminate motor patterns (swimming, shortening, crawling?)

21 R3b1

22 Qué factores determinan que se haga uno o lo otro?
Inyección I en R3b1: Fig2 fictive crawling fictive swimming 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 Qué factores determinan que se haga uno o lo otro?

23 Fig3 BAJO NIVEL SALINA ALTO NIVEL SALINA SALINA NIVEL INTERMEDIO elongation always precedes contraction

24 Fig4 no info on water level

25 Fig5 crawling after mechanical stimulation
Swimming after mechanical stimulation

26 Fig6 Lo que para al animal, hiperpolariza a R3b1

27 Fig7 1- moverse 2- cómo moverse!