Shock and active vasodilatation in skeletal muscle.

The vasodilatation which occurs in the skeletal muscle of the cat following the stimulation of some fibres of the sympathetic nerves and that which follows the intravenous injection of small doses of adrenaline takes place in different vessels. It is, therefore, possible to obtain an augmented effect when both the above stimuli are applied simultaneously. Both mechanisms must be blocked to completely abolish active vasodilatation in skeletal muscle.