PHYSIOLOGICAL CHARACTERISTICS OF SUPERFICIAL BRANCH OF THE RADIAL NERVE INNERVATING MECHANORECEPTIVE UNITS IN THE HUMAN BODY
- VernacularTitle:人体桡神经浅支支配机械感受性单位的生理学特征
- Author:
Jian LIU
;
Kemo WANG
;
Dongyuan CAO
- Publication Type:Journal Article
- Keywords:
unitory discharges;
mechanoreceptive unit;
human body;
superficial branch of the radial nerve
- From:
Journal of Xi'an Jiaotong University(Medical Sciences)
1982;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
By means of intraneural microrecording (IN-MR) and intraneural microstimulation (INMS),the characteristics of hairy skin's mechanoreceptiveunits innervated by superficial branch of radial nerve andthe sensations mediated by the nerve were ob-served on the awaking human body. A total of 47mechanoreceptive units were identified, 35 of them(74. 5%) were classified as SA units and 12 ofthem (25. 5%) as RA units, hair-follicle unit andPC unit were not found in experiments. The aver-age mechanical thresholds of SA units were some-what higher than those of RA units, receptivefields of RA and SA Ⅰ units were significantlysmaller than those of SA Ⅱ units. The type of unitexcited by INMS determined the sensations quali-y, RA units evoked intermittent tapping, SA Ⅰ u-nits evoked sustained pressure; SA Ⅱ units evokedno particular sensation when activated in isolation.The results indicate that the characteristics of themechanoreceptive units in the hairy skin do not differ from those in the glabrous skin at the humanbody.
