Presynaptic inhibition compared with homosynaptic depression as an explanation for soleus H-reflex depression in humans
| Autor: | Mark Hallett, Mary Kay Floeter, André Fabio Kohn |
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| Rok vydání: | 1997 |
| Předmět: |
Adult
Central nervous system Presynaptic inhibition Electromyography Receptors Presynaptic H-Reflex Electromagnetic Fields Homosynaptic Depression medicine Humans Muscle Skeletal Depression (differential diagnoses) Soleus muscle medicine.diagnostic_test Chemistry General Neuroscience Peroneal Nerve Middle Aged musculoskeletal system Spinal cord Electric Stimulation medicine.anatomical_structure Synapses Tibial Nerve H-reflex Neuroscience |
| Zdroj: | Experimental Brain Research. 116:375-380 |
| ISSN: | 0014-4819 |
| DOI: | 10.1007/pl00005765 |
| Popis: | The H-reflex is depressed for seconds if elicited following a single H-reflex or train of H-reflexes. Presynaptic inhibition from flexor afferents (tibialis anterior) onto soleus Ia afferents elicited by either single or trains of stimuli had no effect on the soleus H-reflex on a time scale of seconds. Postsynaptic inhibition was also excluded by magnetic stimulation tests that showed that the excitability of the motoneuron pool was not changed at latencies within a range of seconds. Homosynaptic depression localized at the presynaptic terminal seems to be the mechanism behind the H-reflex depression in humans. |
| Databáze: | OpenAIRE |
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