[Effect of section of the hypoglossal nerve on the glossopharyngeal-hypoglossal reflex in the frog].
This research concerns the modulation by lingual afferences of the reflex activity of frog XII nucleus. Some informations on the processes utilized to obtain this effect has been achieved by comparing the glossopharyngeal-hypoglossal reflex evoked bilaterally after excision of one hypoglossal nerve. The reflex response and electrotonic potential become more intense omolaterally to the section of XII at the IV-V day; However these effects disappear later (XII-XV day). These observations completely disagree with the presence of a large injury normally produced in the nucleus of XII by retrograde motoneuron degeneration. The reflex facilitation has been attributed therefore to the degeneration of the afferent component which is associated in the amphibia to the XII and exerts centrally a PAD effects.
D000818:Animals; D004558:Electric Stimulation; D005071:Evoked Potentials; D005930:Glossopharyngeal Nerve / Q000502:physiology*; D007002:Hypoglossal Nerve / Q000502:physiology*; D011898:Ranidae; D012018:Reflex / Q000502:physiology
Effetti della sezione dell'ipoglosso sul riflesso glos sofaringeo-ipoglosso di Rana.