133 {ERR 
-ERRHINES, OR STERNUTATORIES. | 
Substances which snuffed up the nostrils, stim- 
ulate the pituitary membrane, establishing a dis- 
charge from it when suppressed, and increasing 
tqiion it exiete. fee. 8 ee eas 2 
By contiguous sympathy, the stimulating im- 
pulse thus given to the schneiderian membrane, 
is extended more or less vigorously to the vicinal 
parts. Cullen has gone so far as to assert that 
the effect of errhines extends not only to the ves- 
sels of the neighbouring muscles, by which rheu- 
matic congestions are removed and odontalgic 
irritation allayed, but even supposes it may extend 
to the whole of the branches of the external carotid. 
To this he refers their known power, in some in- 
stances, of curing head-aches, pains of the ear 
and opthalmias. But further, he thinks it * pro- 
bable that they may operate more or less on the 
whole vessels of the head, as even a branch of the 
internal carotid passes into the nose.” 
Errhines create for the most part, sneezing ; 
but this is by no means a constant effect, even in 
such instances as are characterized by the renewed 
or increased mucous discharge. Many however 
believe, that to the convulsive catenated actions of 
sneezing, which involve the muscles of the face, 
throat, tongue, and respiration, is equally owing 
the salutary effect of these remedies, as to the 
increase in the mucous or sero-mucous defluxion. 
