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[Influence of 100 Hz sinusoidal vibration on muscle spindle afferents of soleus muscles in suspended situation rat].
- Source :
-
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering [Space Med Med Eng (Beijing)] 2004 Oct; Vol. 17 (5), pp. 340-4. - Publication Year :
- 2004
-
Abstract
- Objective: To study influence of 100 Hz sinusoidal vibration on muscle spindle afferents discharges of rat soleus muscles in simulated-weightlessness situation.<br />Method: The tail-suspended rat model was used to simulate weightlessness, and 100 Hz sinusoidal vibration was performed by a vibrator. Unit activity was recorded electrophysiologically from the centrally cut filaments of the spinal dorsal roots innervating muscle spindles of the rat soleus muscle; then observation on the changes in afferent discharges from muscle spindle in a rat soleus muscles were made after 7 d.<br />Result: 1) Compared with control muscle spindle afferents discharges of rat soleus muscles decreased after 7 d tail-suspension (P<0.05). 2) Compared with suspension the afferent discharges from soleus muscle spindles increased after 7 d tail-suspension with 100 Hz sinusoidal vibration.<br />Conclusion: Sinusoidal vibration (100 Hz; 300 micrometers) can selectively activate muscle spindles. Muscle spindle afferent input of the suspended rats increased after the application of 7 d 100 Hz sinusoidal vibration.
Details
- Language :
- Chinese
- ISSN :
- 1002-0837
- Volume :
- 17
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering
- Publication Type :
- Academic Journal
- Accession number :
- 15926231