Sensory and motor systems

Sensory and motor systems were quite familiar to me beforehand. However, for example how the dorsal and ventral horns appear to be a bit swollen, is result from a larger need of spinal interneurons and motor neurons at cervical and lumbar enlargements was new thing for me. At this point it’s appropriate to point out that I’ve felt the book has given really good platform to learn more efficiently. Furthermore, at page 470 the figure 13.18 gave me nice insight how neurons, their responses, muscles and really world (weights) work together. From previous lecture, if I understood correctly the question about the flexor reflex, that could this be something to learn? It’s is so powerful reflex that it could be useful when learning something new, i.e. in combat sports

I consider the motor loop to be the key take-a-way from chapter 14. It’s a good illustration how the information flows through different brain areas during planning and executing a curtain movement. Furthermore, I found it intriguing that actually the movement which one is performing now, has decided few seconds before. Consequently, one could argue that our movements have always delay, which might seem odd idea since we like to think that grapping the phone from table is instantaneous movement without delay. Indeed, the planning of the movement has conducted early on, but it’s done more “behind the curtains”, and therefore we don’t consider it to be part of our movement process.

Posted by Tomas Villikka

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