Pattern of ‘non‐reciprocal’ inhibition of motoneurones by impulses in group Ia muscle spindle afferents in the cat

1. Inhibitory post‐synaptic potentials (i.p.s.p.s) evoked by adequate stimulation of group Ia muscle spindle afferents of triceps surae and plantaris and by near‐threshold electrical stimulation of quadriceps and hamstring nerves were recorded in a number of motoneurone species. The aim of the study was to compare the pattern of non‐reciprocal Ia inhibitory actions on hind‐limb motoneurones with the pattern of inhibition evoked from group Ib tendon organ afferents.

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