ciate Motions._

GENUS III.

_Catenated with Voluntary Motions_

SPECIES.

1. _Deglutitio invita._ When any one is told not to swallow his saliva, and
that especially if his throat be a little sore, he finds a necessity of
immediately swallowing it; and this the more certainly, the more he
voluntarily endeavours not to do so.

In this case the voluntary power exerted by our attention to the pharinx
renders it more sensible to irritation, and therefore occasions it to be
more frequently induced to swallow the saliva. Here the irritation induces
a volition to swallow it, which is more powerful than the desire not to
swallow it. See XXIV. 1. 7. So in reverie, when the voluntary power was
exerted on any of the senses, as of sight or taste, the objects of those
senses became perceived; but not otherwise. Sect. XIX. 6. This is a
troublesome symptom in some sore throats.

M. M. Mucilage, as sugar and gum arabic. Warm water held in the mouth
frequently, as a fomentation to the inflamed throat.

2. _Nictitatio invita._ Involuntary winking with the eye-lids, and
twitchings of the face, are originally induced by an endeavour to relieve
some disagreeable sensations about inflamed eyes, as the dazzling of light;
and afterwards these motions become catenated with other motions or
sensations, so as not to be governed by the will. Here the irritation first
produces a volition to wink, which by habit becomes stronger than the
anti-volition not to wink.

This subject is rendered difficult from the common acceptation of the word,
volition, including previous deliberation, as well as the voluntary
exertion, which succeeds it. In the volitions here spoken of there is no
time for deliberation or choice of objects, but the voluntary act
immediately succeeds the sensation which excites it.

M. M. Cover the affected parts with a sticking plaster or a blister. Pass a
fine needle and thread through a part of the skin over the muscle, which
moves, and attach the other end of the thread by a sticking plaster to a
distant part. An issue behind the ear. To practise daily by a looking-glass
to stop the motions with the hand. See the cure of a case of the leaping of
a muscle of the arm, Sect. XVII. 1. 8. See Convulsio debilis, Class III. 1.
1. 5.

3. _Risus invitus._ Involuntary laughter. When the pleasure arising from
new combinations of words and ideas, as in puns; or of other circumstances,
which are so trivial, as to induce no voluntary