324 DISEASES SECT. XXXIV. i. i. 



SECT. XXXIV. 



DISEASES OF VOLITION. 



I. I. Volition defined. Motions termed involuntary are canfed by 

 volition. Deftres cppofed to each ether. Deliberation, sifs be- 

 tween two hay- cocks. Saliva Jwaliowed againjl one's defire. 

 Voluntary motions difllnguifhed from thcfe officiated withferfitive 

 motions. 2. Pains from excefs y and from defecJ oj motion. No 

 pain is felt during vehement voluntary exertion ; (is in cold fits of 

 ague^ labour-pains, Jlrangury, tenefmus^ vomiting, refllejjiiefs in 

 fevers^ convulfion of a wounded mujcle. 3. Of holding the breath 

 and f creaming in pain ; why Jwine and dogs cry out in pain , and 

 notjheep and horfes. Of grinning and biting in pain ; why mad 

 animals bite others. 4. Epileptic convulfions explained > why the 

 Jits begin with quivering of the under jaw > biting the tongue^ and 

 fetting the teeth ; why the convulfive motions are alternately re/ax- 

 ed. "The phanometwn of laughter explained > Why children can- 

 not tickle themf elves. How feme have died from immoderate 

 laughter. 5. Of cataleptic fpafms^ of the locked jaw 3 of painful 

 cramps. 6. Syncope explained. Why no external objects are 

 perceived in fynccpe. 7. Of palfy and apoplexy from violent exer- 

 tions. Cafe of Mrs. Scot- From dancing^ fcating, fwimming. 

 Cafe of Mr. Nairne. Why palfies are not always immediately 

 preceded by violent exertions* Palfy and epilepfy from di/eafed 

 livers. Why the right arm more frequently paralytic than the 

 left. How paralytic limbs regain their motions. II. Difea/es of 

 the fenfuai motions from excefs or defeft of voluntary exertion. 

 I. Aladnefs. 2. Diftinguijhed from delirium . 3. Why man- 

 kind more liable to infanity than brutes. Sufpicion Want of 

 Jhame^ and of clean linefs. 5. They bear co/d y hunger , and fatigue. 

 Charles XII. of Sweden. 6. Pleafurable delirium, and infinity. 

 Child riding on a flick. Pains of martyrdom not felt. 7. Drop- 

 fy. 8. Inflammation cured by infanity. III. I. Pain relieved 

 by reverie. Reverie is an exertion of voluntary andfenfttive mo- 

 tions. 2. Cafe of reverie. 3. Ladyfuppojedto have two fouls. 

 4. Methods of relieving pain. 



I. i. BEFORE we commence this Seflion on Difeafed Vol- 

 untary Motions, it may be neceflary to premife, that the word 

 volition is not ufed in this work exactly in its common accepta- 

 tion. Volition is faid in Section V. to bear the fame analogy to 

 defire and averfion, which fenfation does to pleafure and pain. 

 And hence that, when defire or averfion produces any action of 



the 



