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Properties of motor units in fast and slow skeletal muscles of the rat
Open accessAbstract
1. Three kinds of motor unit have been distinguished in soleus (SOL) and extensor digitorum longus (EDL) muscles of adult rats on the basis of differences in isometric twitch contraction times measured at 35° C. 2. SOL contains about thirty motor units of which about twenty‐seven are slow and three are intermediate with average contraction times of 38 and 18 msec respectively. 3. EDL contains about forty fast motor units with an average contraction time of 11 msec. 4. Average values for maximum isometric tetanic tension were 4·7 g for fast and slow units and 5·85 g for intermediate units. 5. Average values for twitch‐tetanus ratios ranged from 0·2 to 0·227 for EDL muscles, SOL muscles and the three kinds of motor units.
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Citations
Cites
PROPERTIES OF MOTOR UNITS IN A HOMOGENEOUS RED MUSCLE (SOLEUS) OF THE CAT
McPhedran, A. M., Wuerker, R. B., & Henneman, E. (1965) · Journal of Neurophysiology · doi:10.1152/jn.1965.28.1.71 · Cited by 323
Cited by
Fiber Types in Mammalian Skeletal Muscles
Schiaffino, S., & Reggiani, C. (2011) · Physiological Reviews · doi:10.1152/physrev.00031.2010 · Cited by 3,022
Dynamic properties of mammalian skeletal muscles.
Close, R. I. (1972) · Physiological Reviews · doi:10.1152/physrev.1972.52.1.129 · Cited by 1,890
Self-citationSkeletal Muscle Adaptability: Significance for Metabolism and Performance
Saltin, B., & Gollnick, P. D. (1983) · Comprehensive Physiology · doi:10.1002/cphy.cp100119 · Cited by 890
Motor Units: Anatomy, Physiology, and Functional Organization
Burke, R. E. (1981) · Comprehensive Physiology · doi:10.1002/cphy.cp010210 · Cited by 782
Polyneuronal innervation of skeletal muscle in new‐born rats and its elimination during maturation.
Brown, M. C., Jansen, J. K., & Van Essen, D. (1976) · The Journal of Physiology · doi:10.1113/jphysiol.1976.sp011565 · Cited by 783
Metadata
- Authors
- Close, R.
- Venue
- The Journal of Physiology
- Publisher
- Wiley
- Published
- 1967-11
- Volume
- 193
- Issue
- 1
- Pages
- 45-55
- ISSN
- 0022-3751 (ISSN-L)
- 1469-7793
- OpenAlex
- W2129685609
- Cited by
- 284
- References
- 1
- FWCI
- 4.01
- Type
- journal article
- Language
- en
- Open access
- green
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