innervation - abrahem

[ArchivalUser]

if we cut the innervation from muscle in upper limb,what will happen to the muscle?
decrease myofibril diameter or myofibril number or what?
any one know the exact answer?

[ArchivalUser]

muscle atrophies.....in other woords decrease in the no of myofibrils.

[ArchivalUser]

but atrophy means decrease in mass
i dont know the exact answer but if we compare it to hyperplasia: increase in no
hypertrophy: increase in size

[ArchivalUser]

Atrophy would result in decrease in muscle mass i.e the loss of the ability of the muscle fibres to regenerate themselves. The other terms are:

Aplasia: Failure of cell production eg organ agenesis

Hypoplasia: decrease in cell production less severe than aplasia eg lack of growth or maturation of gonads in turners' etc

Atrophy: Decrease in size of organ due to decrease in mass of pre-existing cells.

I guess that means that the muscle fibers will shrink.

[ArchivalUser]

i think its decrease in myofibril diamater.
decrease in myofibril number is death of myofibril which doesnot happen in atrophy.