Raphe magnus and reticulospinal actions on primary afferent depolarization of group I muscle afferents in the cat.
نویسندگان
چکیده
منابع مشابه
Primary afferent depolarization and frequency processing in auditory afferents.
Presynaptic inhibition is a widespread mechanism modulating the efficiency of synaptic transmission and in sensory pathways is coupled to primary afferent depolarizations. Axonal terminals of bush-cricket auditory afferents received 2-5 mV graded depolarizing inputs, which reduced the amplitude of invading spikes and indicated presynaptic inhibition. These inputs were linked to a picrotoxin-sen...
متن کاملThe same spinal interneurons mediate reflex actions of group Ib & II afferents and crossed reticulospinal actions
The aim of the study was to analyze interactions between neuronal networks mediating centrally initiated movements and reflex reactions evoked by peripheral afferents; specifically whether interneurons in pathways from group Ib afferents and from group II muscle afferents mediate actions of reticulospinal neurons on spinal motoneurons via contralaterally located commissural interneurons. To thi...
متن کاملSENSORIMOTOR CONTROL OVER FUSIMOTOR NEURONS OF THE TENUISSIMUS MUSCLE IN THE A NESTHETIZED CAT: A QUALITATIVE PRIMARY AFFERENT RECORDING
Cortical control of the sensory output of muscle spindles was studied in thirteen anesthetized cats in the present experiment. Gamma motoneuron activity was monitored during electrical stimulation of the sensorimotor cortex while recording from single primary afferents from the tenuissimus muscle. Findings are as follows: 1. The state of anesthesia is crucial in obtaining reproducible resu...
متن کاملSame spinal interneurons mediate reflex actions of group Ib and group II afferents and crossed reticulospinal actions.
The aim of the study was to analyze interactions between neuronal networks mediating centrally initiated movements and reflex reactions evoked by peripheral afferents; specifically whether interneurons in pathways from group Ib afferents and from group II muscle afferents mediate actions of reticulospinal neurons on spinal motoneurons by contralaterally located commissural interneurons. To this...
متن کاملPrimary afferent depolarization of myelinated fibres in the joint and interosseous nerves of the cat.
1. Changes in the excitability of the intraspinal terminals of fibres in the posterior knee joint and interosseous nerves were used as a measure of primary afferent depolarization (PAD) which is associated with presynaptic inhibition of transmission from afferent fibres. These were estimated from changes in the intensity of electrical stimuli required to activate the fibres in 50% of trials. In...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1995
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1995.sp020545