physio ques???

[cutedoc12]

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can anyone explain the following ques?????

what sensory unit is responsible for tone of skeletal muscle?
1.muscle spindle
2.golgi tendon
3 sarcomere
4pacinian corpuscles

ans is 1 or 2 ???

is there any difference b/w muscle tension nd muscle tone????

PLZZZ DO REPLY.....

 

[DragonWell]

Based on my understanding...golgi tendon organ is responsible for muscle tone. Muscle spindle responds to muscle stretch.

I remember this by remembering the anatomy of the receptors - ie. muscle spindles are in parallel w/ the muscle fibers - therefore they will be stretched when the muscle is stretched, but this doesn't tell the CNS anything about the tone of the muscle as a whole, only that the muscle is being lengthened.

GTO's are in series with muscle fibers, ie they will sense the sum of muscle tension in many fibers, and adjust tone accordingly. For example, if tone is increased greatly, they will cause reflex relaxation of the muscle - clasp-knife reflex.

In my mind, at least in most circumstances, I think of tension as more or less equal to tone...but maybe in a certain context you could think about tone as the amount of contraction occurring at rest in the muscle, and tension as the amount of contraction occurring under load...?

 

[cutedoc12]

thanx a lot dragon well.....

 

[DwyaneWade]

Based on my understanding...golgi tendon organ is responsible for muscle tone. Muscle spindle responds to muscle stretch.

I remember this by remembering the anatomy of the receptors - ie. muscle spindles are in parallel w/ the muscle fibers - therefore they will be stretched when the muscle is stretched, but this doesn't tell the CNS anything about the tone of the muscle as a whole, only that the muscle is being lengthened.

GTO's are in series with muscle fibers, ie they will sense the sum of muscle tension in many fibers, and adjust tone accordingly. For example, if tone is increased greatly, they will cause reflex relaxation of the muscle - clasp-knife reflex.

In my mind, at least in most circumstances, I think of tension as more or less equal to tone...but maybe in a certain context you could think about tone as the amount of contraction occurring at rest in the muscle, and tension as the amount of contraction occurring under load...?

AFAIK this is a good explanation and is the right answer.