Trigeminal antidromic vasodilation and plasma extravasation in the rat: Effects of sensory, autonomic and motor denervation

The cutaneous vasodilatation and plasma extravasation observed following antidromic stimulation of trigeminal sensory branches in the rat are reduced by atropine. The atropine-sensitive component does not originate from the seventh cranial nerve (facial nerve) or from the mental nerve, because after chronic section of these nerves an atropine-sensitive component persists. The cholinergic component of the plasma extravasation is abolished by …