CONTENTS. 



PAGE 



459. The characters of a reflex movement dependent on the strength of 



the stimulus 699 



460. The characters of a reflex movement dependent on the part of the 



body to which the stimulus is applied 700 



461. The complexity of many reflex movements ; their relation to intel- 

 ligence 700 



462. Reflex movements coordinated by afferent impulses other than the 



exciting impulses . . . . . . . ,- . . . 702 



463. The characters of a reflex movement determined by the intrinsic 



condition of the cord 703 



464. The reflex movements carried out by the spinal cord in man . . 704 



465. Reflex actions resulting in changes other than movements . . 706 



466. The inhibition of reflex actions 707 



467. The time required for reflex actions 709 



SECTION IV. 

 THE AUTOMATIC ACTIONS OP THE SPINAL CORD. 



468. Automatic actions of the spinal cord in the frog and in the dog . 711 

 469. Automatic activity dependent on afferent impulses . . . .712 



470. Tone of skeletal muscles . . . . . . . . .713 



471. Tendon phenomena, knee jerk . . . .... 717 



472. Rigidity of muscles through spinal action 717 



CHAPTER IL 

 THE BRAIN. 

 SECTION I. 



ON THE PHENOMENA EXHIBITED BY AN ANIMAL DEPRIVED OF ITS 

 CEREBRAL HEMISPHERES. 



473. The absence of distinct signs of volition and intelligence . .719 

 474. The characters of the movements of a brainless frog . . . 720 

 475. The phenomena exhibited by birds after removal of their cerebral 



hemispheres 723 



476. The effects of removing the cerebral hemispheres in mammals . 725 

 477. The effects of removing the cerebral hemispheres in the dog . . 727 



SECTION II. 

 THE MACHINERY OF COORDINATED MOVEMENTS. 



478. The effects of injury to the semicircular canals. Our appreciation 

 of the position of our body, the sense of equilibrium. Afferent 

 impulses and sensations as factors of the coordination of move- 

 ments 729 



