GLOSSARY. 177 



Internal capsule. A portion of white brain matter which 

 separates the corpus striatum and optic thalamus from 

 the lenticular nucleus. 



Invert sugar. Produced by the action of inversive ferment, 

 "invertin," upon cane sugar. 



Irra'diation (L. irradio, to shine upon). A phenomenon in 

 which bright objects appear larger than actually. 



Isotro'pous (Gr. isos, equal; trope, a turning). Singly re- 

 fractive. 



Jaeobson's nerve. The tympanic branch of glossopharyn- 

 geal. 



Karyokine'sis (Gr. kanton, the kernel of a nut ; kineo, I 

 move). A variety of cell divisions in which the nucleus 

 undergoes skein, rosette, and asteroid changes. 



Katabo'lic (Gr. kata> down, ballo, to throw). Destructive or 

 analytical metabolism. An inhibitory or lowering in- 

 fluence exerted by certain nerves upon metabolism. 



Katacro'tic (Gr. kata, down; krotos, a striking). Applied to 

 pulse tracings in which the interruptions occur in the 

 descent. 



Kine'tic energy (Gr. kineo, I move). The energy of motion. 



Ky'mograph (Gr. kumo, wavy ; grapho^ I write). An instru- 

 ment for graphically recording blood pressure. 



Kypho'sis (Gr. kuphosis, humpbacked). Backward angular 

 curvature of spine. 



Laky blood. A term, applied to blood in which the red 



corpuscles have been broken up. 

 Lambda (Gr. lamda, the letter L). A point of the skull 



corresponding to posterior fontanelle. 

 Larda'cein. A pathological proteid substance, which stains 



red with methyl violet. Also called " Amyloid substance." 

 Latent period. That period which intervenes between the 



application of a stimulus and the manifest response given 



by the irritated matter. 



N 



