THE LARYNGEAL IMAGE.--When the mirror is introduced and is held in the proper place, and the light is reflected downward, the laryngeal image {31} will appear on the surface of the mirror. As it is, however, so different from what might be expected after having examined a larynx removed from the body, it requires a detailed description, and the student will do well to refer to the diagrams frequently while examining patients, to make himself familiar with the details he sees, and to recognize them when they are altered by disease or when they are slightly different in shape in different individuals. Figs. 7 and 8 represent the image of the larynx in the act of respiration and of phonation as it appears on the surface of the mirror, while Figs. 9 and 10 are diagrammatic, and are intended to represent the same. [Illustration: FIG. 7. Laryngeal Image during Respiration.] [Illustration: FIG. 8. Laryngeal Image during Phonation.] [Illustration: FIG. 9. Laryngoscopic Diagram showing the vocal cords widely drawn apart, and the position of the various parts above and below the glottis during quiet breathing. _g. e._ Glosso-epiglottic fold. _s. u._ Upper surface of epiglottis. _l._ Lip or arch of epiglottis. _c._ Protuberance of epiglottis. _v._ Ventricle of the larynx. _a. e._ Ary-epiglottic fold. _c. W._ Cartilage of Wrisberg. _c. S._ Cartilage of Santorini. _com._ Arytenoid commissure. _v. c._ Vocal cord. _v. b._ Ventricular band. _p. v._ Processus vocalis. _c. r._ Cricoid cartilage. _t._ Rings of trachea. (From Mackenzie.)] [Illustration: FIG. 10. Laryngoscopic Diagram showing the approximation of the vocal cords and arytenoid cartilages, and the position of the various parts during vocalization. _f. i._ Fossa innominata. _h. f._ Hyoid fossa. _c. h._ Cornu of hyoid bone. _c. W._ Cartilage of Wrisberg. _c. S._ Cartilage of Santorini. _a._ Arytenoid cartilages. _com._ Arytenoid commissure. _p. v._ Processus vocalis and cartilages of Seiler. (From Mackenzie.)]