AGE-DEPENDENT CHANGES IN CAT MASSETER NERVE - AN ELECTROPHYSIOLOGICAL AND MORPHOLOGICAL-STUDY

被引：45

作者：

CHASE, MH

ENGELHARDT, JK

ADINOLFI, AM

CHIRWA, SS

机构：

[1] UNIV CALIF LOS ANGELES,SCH MED,DEPT PHYSIOL,LOS ANGELES,CA 90024

[2] UNIV CALIF LOS ANGELES,SCH MED,DEPT ANAT & CELL BIOL,LOS ANGELES,CA 90024

来源：

BRAIN RESEARCH | 1992年 / 586卷 / 02期

关键词：

AGING; AXON; CONDUCTION VELOCITY; ELECTROPHYSIOLOGY; MASSETER; MICROSCOPY; MOTONEURON; NERVE;

D O I：

10.1016/0006-8993(92)91637-T

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

The present study was undertaken to determine the manner in which aging affects the function and structure of the masseter nerve in old cats. Electrophysiological data demonstrated a significant decrease in the conduction velocity of the action potential in old cats compared with that observed in adult cats. Light microscopic analyses revealed an age-dependent decrease in axon diameter. Electron microscopic observations of the masseter nerve in the aged cats revealed a disruption of the myelin sheaths and a pronounced increase in collagen fibers in the endoneurium and perineurium. These morphological changes are discussed and then related to the decrease in conduction velocity which was observed in the electrophysiological portion of this study.

引用

页码：279 / 288

页数：10

共 54 条

[21] PERCEPTUAL FEATURES OF SPEECH FOR MALES IN 4 PERCEIVED AGE DECADES [J].