ISSN:
1432-1106
Schlagwort(e):
Cerebellar inputs
;
Muscle receptor modalitites
;
Interpositus nucleus
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Medizin
Notizen:
Summary 1. Responses of interpositus neurones to adequate stimulation of gastrocnemius-soleus muscle receptors and to electrical stimulation of various muscle nerves were investigated in the decerebrate, unanaesthetized cats. 2. Brief muscle pulls of graded amplitude, supplemented by graded stimulation of nerves was used for differentiation of the modality of muscle receptors evoking responses of interpositus neurones. 3. In only 4 out of 75 of these neurones was an excitatory or inhibitory action observed for group Ia inputs. 4. In 4 out of 25 cells tested for the response to isometric contraction of the muscle, response augmentation was observed when the pull was superimposed on the rising phase of the contraction. It is assumed that the effect is due to the action of group Ib input from the muscle. 5. By contrast to this poor performance of group Ia and Ib muscle afferents, group II afferents had excitatory or inhibitory actions on most interpositus neurones (in 46 out of 62 cells). 6. From the latency distribution of the response it was concluded that the main source of excitatory inputs is not the direct spino-cerebellar tracts but indirect pathways.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00237900
