1 82 GLOSSARY. 



Proglot'tis (Gr. pro; glottis , the tongue). Segment of a taenia, 



or tapeworm. 

 Prone'phros (Gr.pro ; nephros, the kidney). The upper part 



of Wolffian mass which leaves no representative organ. 



Duct represented by Miiller's tube. 

 Propep'tone (Gi. pro ; pepto, I digest). Identical with hemi- 



albumose. 

 Prota'gon (Gr. protagori). A glucoside which occurs in 



nerves. 



Proteo'ses, Identical with albumoses. 



Psychical blindness (Gr. psuche, the mind). A loss of con- 

 scious visual sensation after removal of central portion of 



visual area of cortex cerebri. 

 Pte'rion (Gr. pteron, a wing; pteris, the tern). The 



junction of sphenoid, squamous temp., and parietal 



bones. 

 Pulse (L. petto, I strike). An expansive wave of the arteries 



caused by variations in the mean blood pressure. 

 Pulsus alternans, A pulse which presents regular alter- 

 nations of high and low beats. 

 Pulsus bigem'inus (L. pello, I strike; bigemtnus, twin). A 



pulse in which the beats occur in pairs, with a long pause 



after every second beat. 

 Purkinje's muscle fibres. Semi-striated transitional fibres 



found in heart of sheep, ox, &c. 

 Purkinje-Sanson's images. Reflections of light from cornea, 



anterior and posterior surfaces of lens, as seen in Helm- 



holtz's accommodation experiment. 

 Pyramid of Ferrein The continuation of a medullary ray 



into cortex of kidney. 



Eamus commu'nicans (L. ramus, a branch ; communtcans, 

 communication). The visceral or splanchnic division of 

 spinal root. 



Reaction of degeneration. That condition of a paralyzed 

 muscle in which it responds more readily to a continuous, 

 than to an interrupted current. 



Eecur'rent sensibility (L. recurro, I run back). Indica- 

 tions of sensation shown upon division of anterior spinal 

 root ; due to sensory fibres running back to cord. 



