44 



VETERINARY PHYSIOLOGY 



3rd. Any sudden change of temperature, either heating or 

 cooling, stimulates muscle. A slow change of temperature 

 has little or no effect. Every muscle, however, passes into 

 a state of contraction, heat stiffening, when a sufficiently high 



M. Uiccpt (long bead) 



M. triceps (inner head) 

 OTwn-j 



M. flexor carpi nlnarii 



K. flex, dlfttor. oomtnuo. 

 profuod. 



1L flex, digitor. aublin. 

 <digltl7l. et 1IL) 



U. flex, digit, subl. (digit, 

 ludicis et minimi) 



Ulnarr.. 



M. 



M. abUactor digita ruin. 



M. flexor digit. "'" 



ILopponena digit, mia. 



Hm. lumbricale. 



-- M. atxlacto? potlio. Jj/C' 

 M. opponcnx 



U. flex. poll. breT 



M. adductor polbc. UCT 



FIG. 17. Motor Points of Arm. 



temperature to coagulate its protein constituents is reached. 

 This, however, is not a true living contraction. (Practical 

 Physiology.) 



^th. Muscle may also be made to contract by any sudden 

 change in an electric current passed through it, whether the 



