A Consideration of Stretch and Vibration Data in Relation to the Tonic Stretch Reflex
The primary endings of the muscle spindle have for a long period of time been regarded as the main source of autogenetic excitation in tonic and phasic stretch reflexes. This idea has been questioned since 1969, and it has been suggested that the secondaries play the main role in tonic reflexes. An account is given of the different arguments for and against the secondary endings being the main source for excitation in the stretch reflex.
KeywordsStein Procaine Prepar
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- Brown, M.L., Lawrence, D.G., and Matthews, P.B.C., 1968. Reflex inhibition by Ia afferent input of spontaneously discharging gamma motoneurones in the decerebrate cat. J. Physiol. 198, 5–7P.Google Scholar
- Cavagna, G.A., Dusman, B., and Margaria, R., 1960. Positive work done by a previously stretched muscle. J. Appl. Physiol. 24, 21–32.Google Scholar
- Grillner, S., 1970. Is the tonic stretch reflex dependent upon group II excitation? Acta Physiol. Scand. 78, 431–432.Google Scholar
- Grillner, S., 1972. The role of muscle stiffness in meeting the changing postural and locomotor requirements for force development by the ankle extensors. Acta Physiol. Scand. 86, 92–108.Google Scholar
- Grillner, S., and Udo, M., 1970. Is the tonic stretch reflex dependent on suppression of autogenetic inhibitory reflexes? Acta Physiol. Scand. 79, 13–14A.Google Scholar
- Grillner, S., and Udo, M., 1971a. Motor unit activity and stiffness of the contracting muscle fibres in the tonic stretch reflex. Acta Physiol. Scand. 81, 422–424.Google Scholar
- Grillner, S., and Udo, M., 1971b. Recruitment in the tonic stretch reflex. Acta Physiol. Scand. 81, 571–573.Google Scholar
- Holmquist, B., and Lundberg, A., 1961. Differential supraspinal control of synaptic actions evoked by volleys in the flexion reflex in alpha motoneurones. Acta Physiol. Scand. Suppl. 54, 1–51.Google Scholar
- McGrath, G.J., and Matthews, P.B.C., 1970. Support for an autogenetic excitatory reflex action of the spindle secondaries from the effect of gamma blockade by procaine. J. Physiol. 210, 176–177P.Google Scholar