muscle spindles
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There ARE no interneurons involved here :|
It's a monosynaptic reflex. That's just the preganglionic part of the neuron.
monilia347 2 weeks ago
@usanomad You're mostly right, but there will be interneurons and the synapses between them and the motor/sensory neurons located there.
bjl6841 1 year ago
Makes sense, but 1:34 when the signal passes through the dorsal root ganglia, you state that it's going through an interneuron, when the ganglia simply house the cell bodies of the neurons. It's the right way in the diagram, I don't believe they synapse there.
usanomad 1 year ago 2
Sorry for the heap of replies but i had to spread it out over 3 in order to send them ... there a 500 word limit for each post.
MrDrBulla 1 year ago
I would have thought that the mechanism used to increase muscle force due to a quick period of lengthening (eccentric muscle action) before a concentric action is due to the elastic recoil of the series elastic component (SEC - tendon and all it's connective tissues).
MrDrBulla 1 year ago
Aren't muscle spindles more of a protective mechanism as opposed to a mechanims that could be utilised by an athlete? For the efferent impulse to be sent, the muscle fibres need to be put on such a large stretch that the muscle fibres are almost torn/strained.
MrDrBulla 1 year ago
Am I correct in saying that this will only occur at the end range of movement (where the muscle spindles act to prevent tearing/strain of muscle fibres). Otherwise if you were to quickly extend your elbow for example (biceps working eccentrically) then you would expect the muscle spindles to fire and thus cause a reflex contraction ... which it doesn't.
MrDrBulla 1 year ago
So if you want to contract a muscle, it helps if you stretch it first as this elicits the reflex to contract.
philfagan 2 years ago
this is the easiest explanation i have seen,i will be using this to teach my students.
filthhoundsofhades 2 years ago
thank you so much that helped me alot
damoo386 2 years ago