SYSTEMATIC SYNTHESIS OF ORGANS INTO APP. 37 7 



1189. Illus. In walking, the action of muscles necessary to bal- 

 ance the body should be involuntary. In playing a familiar tune, or in 

 speaking, certain, muscles should be involuntarily associated in action. 



1190. THE VOLUNTARY MOTORY APPARATUS MAY BE 



SUBDIVIDED in accordance with the groups of muscles 

 naturally associated in action. 



1191. Remark. THIS VIEW WILL ACCOUNT for the continuous gan- 

 glia of the spinal cord, the lower ones involuntarily associating and har- 

 monizing the action of the muscles of the lower extremities, other parts 

 of the cord doing the same in regard to muscles corresponding to them, 

 till at the upper part of its motor tract the cerebellum is found crowning 

 its involuntary office by harmonizing the action of all the muscles of the 

 body, while the voluntary portion of the tract extends still higher, and 

 reaches forward to receive the wilful action of the mind. 



1192. Inf. EXERCISE OP THE MOTORY APPARATUS is something more 

 than exercise of muscles it is also that of nerves, ganglia, and even the 

 skeleton ; and disease or derangement of the Motory apparatus may be 

 of either ganglia, nerves, or muscles, or of all at once. When mo- 

 tion cannot be produced, the question is, which part of the apparatus is 

 at fault ? Perfect action of the Motor apparatus requires exercise and 

 perfection of the ganglia and nerves, and exercise of the motor ganglia 

 is particularly essential. 



1193. THE DECOMPOSITION ATTENDANT UPON EXER- 

 CISE OF THE MOTOR APPARATUS REQUIRES it to be also 

 associated with centres that excite appetite, influence di- 

 gestion, and especially with those influencing respiration. 



1194. ONE OF THE MOST IMPORTANT ADVANTAGES OF 

 THE MOTORY EXERCISES, is that they cause more air to be 

 breathed ; in fact, if the chest is constrained, or the air 

 impure, muscular exercise is harmful rather than benefi- 

 cial. Let the trunk-walls be free to move, cause pure air 

 to be inhaled, then shall exercise invigorate the whole 

 body, giving a hearty appetite, good digestion, a glowing 

 complexion, sound sleep, and in every way a full meas- 

 ure of physical enjoyment, and of course mental profit. 



1195. Inf. Those exercises that cause free respiration, as SPEAK- 

 ING, SINGING, READING ALOUD, ROWING, etc., must be the best. 



1189. Illus. 1190. How may ? 1191. For what ? 1192. What said of ? 

 1193. What does ? 1194. What is ? 1195. What said of ? 



