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CONTENTS. 



SECTION IV 

 THE MUSCULAR SENSE. 



PAGK 



659. We possess a sense of ' movement,' of ' position,' and of ' effort' . 1059 



660. The muscular sense distinguished from the sense of effort . . 1060 

 661. The afferent impulses forming the basis of the muscular sense are 



distinct from cutaneous impulses 1061 



662. They are derived from the muscles, ligaments, and tendons . . 1063 



SECTION V. 

 ON TACTILE PERCEPTIONS AND JUDGMENTS. 



663. The ties between touch and the muscular sense .... 1066 



664. The ties between touch and sight 1067 



665. Cutaneous sensations may arise otherwise than from cutaneous 



events 1068 



666. Tactile Illusions 1069 



CHAPTER VII. 

 ON SOME SPECIAL MUSCULAR MECHANISMS. 



SECTION I. 

 THE VOICE. 



667. The laryngoscopic view of the larynx 1070 



668. The fundamental features of the voice ; loudness, pitch, and 

 quality. The main conditions of the utterance of voice ; 

 adduction and tightening of the vocal cords .... 1074 



669. The muscles of the larynx 1076 



670. The action of the muscles in reference to narrowing and widening 



the glottis and to tightening and slackening the vocal cords . 1080 

 671. The nervous mechanisms of the larynx. The respiratory move- 

 ments of the larynx 1081 



672. The nervous mechanism of phonation 1084 



673. The cortical area for movements of the larynx . . . 1084 



674. The different kinds of voice. Changes in the glottis other than 



those of mere adduction and general tension .... 1085 

 675. Chest-voice and head- voice. The registers of the voice. The com- 

 plexity of the laryngeal movements 1087 



676. The uses of the ventricles and other parts of the larynx . . 1091 

 677. The ' break ' in the voice at puberty 1091 



