an erection
When a muscle contracts, it pulls with a force generated by the muscle fibers contracting and shortening.
it hurts
The muscle responds and pulls on a bone by way of a tendon. It can not react until the nerve tells it to.
Diaphram
shoulder
you have then stretched your tendon / muscle beyond the normal range .
When one muscle pulls, the other muscle relaxes.
The muscle responds and pulls on a bone by way of a tendon. It can not react until the nerve tells it to.
no its simply just a strain on your muscle, in which you need to let it heal.
agonists
superior oblique
The diaphragm.