C 128 1 
4. It is objected alfo that every voluntary mufcfe' 
in the body becomes involuntary when it is drongly 
dimulated, for example the accelerators urine? are 
quite voluntary in their adion ot expelling the urine, 
but adl involuntarily in expelling the femen. 
When we condder the date of the foul and body 
under any great commotion of mind, we find the 
ufual operations of the mind itfelf are not only inter- 
rupted, but thofe parts of the body too which the 
will cannot controul are now agitated by the dorm; 
for every one has experienced that the heart and 
'vifcera in general are vehemently affeded by ftrong. 
paflions. The mind is in its turn re-aded upon, 
by very drong bodily fenfations; it being-well known 
that mufcular parts, which are ordinarily fubjed to 
our volitions, ceafe to be fo if any part is dimulated 
by exquidtely pleading, or excedively painful fenfa- 
tions ; under fuch a ftimuhs , they are neceffarily 
contraded or convulfed. But it is not therefore to 
be concluded that the gentle Jlimulus of the blood on 
the furface of the heart, and of the air, food, and in- 
tedinal juices on the intedines, of which the mind 
has no confcious perception at all, much lefs a difa- 
greeable one, can lay it under any dmilar necefdty, 
as fome have argued ; and therefore the independence 
would caufe aconfufion in our fenfations as well as in the mo- 
tions of our mufcles. — with refpedt to fenfation I have remarked 
that confufion or indeterminate fenfation, is that, which is pro- 
per to parts whofe nerves arife from ganglions — and that the muf- 
cular motions of thefe parts are by means of ganglions not 
regulated by the will, but fubfift by the application of an irri- 
tating caufe: and, inftead of proving that fympathy in the abdo- 
minal vifcera does not arife from ganglions, they prove that it does, 
bee Whytt ondifeafes of the nerves. 
