EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Electrophysiological properties of mechanoreceptors of single sensory unit innervating toad's femoral skin


Shikwa Gakuho 86(5): 825-850
Electrophysiological properties of mechanoreceptors of single sensory unit innervating toad's femoral skin
Single sensory units innervating toad femoral skin were prepared for study; and response characteristics of each mechanoreceptors in the single units to rectangular-mechanical, ramp-mechanical, and vibratory stimuli applied to warts in the receptive field were investigated. 1. Numbers of skin warts in the receptive fields of 28 fast-adapting units were 12.7 .+-. 5.7; those in fields of 15 slow-adapting units were 8.8 .+-. 4.7, with a mean value of .+-. S. D. 2. In some fast-adapting units each mechanoreceptor showed on-responses to rectangular mechanial stimulation, whereas others showed both on- and on-off-responses to the same kind of stimulus. All mechanoreceptors of slow-adapting units, on the other hand, showed slow-adapting responses during the plateau phase of the same kind of mechanical stimulation. 3. Fast-adapting units may be classified as fast-adapting unit a and fast-adapting unit b(b1, b2, and b3) according to response patterns demonstrated during the dynamic and static phases of ramp mechanical stimulation. Whereas the a type bears only a fast-adapting mechanoreceptor a (critical slope; more than 1 .mu.m/ms and thermal stimulation: no response), the b type bears various kinds of mechanoreceptors (b1, b2, and b3-critical slope: less than 1 .mu.m/ms and cold stimulation: no response) on its branches. 4. All fast-adapting-unit mechanoreceptors a demonstrated similar response to vibratory stimulation. And the responses of slow-adapting-unit mechanoreceptors were similar to each other. Mechanoreceptors b1, b2, and b3 of the fast-adapting b type, however, showed different response patterns to vibratory stimulation. The upper limits (80 .apprx. 110 Hz) of fast-adapting mechanoreceptors of the b1 and b2 types with a low displacement threshold to rectangular mechanical stimulation were higher than those (30 .apprx. 40 Hz) of mechanoreceptors of the b1 and b2 types with high thresholds. Upper limits (9 .apprx. 10 Hz) of fast-adapting mechanoreceptors of the b3 type, however were the same as those obtained for slow-adapting mechanoreceptors.


Accession: 005349736



Related references

Electrophysiological properties of the mechanoreceptors of a single sensory unit innervating toad femoral skin. Shika Gakuho. Dental Science Reports 86(5): 825-850, 1986

Aδ-fiber low threshold mechanoreceptors innervating mammalian hairy skin: A review of their receptive, electrophysiological and cytochemical properties in relation to Aδ-fiber high threshold mechanoreceptors. Neuroscience and Biobehavioral Reviews 61: 225-238, 2016

Sensory innervation of the anterior cruciate ligament. An electrophysiological study of the response properties of single identified mechanoreceptors in the cat. Journal of Bone and Joint Surgery. American Volume 74(3): 390-397, 1992

Responses Of Mechanoreceptors In The Femoral Skin Of The Toad. Ii. Response To Mechanical Stimuli At Two Points In The Receptive Field. Nihon Seirigaku Zasshi. Journal of the Physiological Society of Japan 26: 197-210, 1964

Electrophysiological properties of sensory units innervating the sublingual and submandibular ducts of cats. Shika Gakuho. Dental Science Reports 88(11): 1727-1745, 1988

(Responses Of Mechanoreceptors In The Femoral Skin Of The Toad. I. Responses To Various Mechanical Stimuli.). Nihon Seirigaku Zasshi. Journal of the Physiological Society of Japan 26: 162-180, 1964

Response characteristics of fast-adapting and slow-adapting mechanoreceptors in the femoral skin of the toad to defined mechanical stimuli. Shika Gakuho. Dental Science Reports 86(3): 379-407, 1986

Response characteristics of fast adapting and slow adapting mechanoreceptors in toad's femoral skin to defined mechanical stimuli. Shikwa Gakuho 86(3): 379-407, 1986

Single unit sensory in free walking crabs force sensitive mechanoreceptors of the dactyl. Brain Research 336(2): 337-341, 1985

Single unit sensory activity in free walking crabs: force sensitive mechanoreceptors of the dactyl. Brain Research 336(2): 337-341, 1985