Excitatory and Inhibitory Mechanisms Involved in the Dynamic Control of Posture during the Cervicospinal Reflexes
Excitatory and Inhibitory Mechanisms Involved in the Dynamic Control of Posture during the Cervicospinal Reflexes
The main structure that regulates posture in decerebrate animals is the lateral vestibular nucleus (LVN), whose descending verstibulospinal (VS) pathway excites mono- and polysynaptically ipsilateral neck and limb extensor motoneurons. However, in the addition to the LVN, there are two other structures that exert an antagonistic influence on posture. The first region is represented by the medical aspect of the medullary reticular formation, from which the inhibitory reticulospinal (RS) pathway acting on ipsilateral limb extensor motoneurons originates. This area is under the tonic excitatory influence of a dorsal tegmental region whose neurons, located in the peri-locus ceruleus and the neighboring pontine reticular formation (PRF) are cholinosensitive and also cholinergic in nature.
Keywords: posture, lateral vestibular nucleus, motoneurons, reticulospinal pathway, pontine reticular formation
Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.
Please, subscribe or login to access full text content.
If you think you should have access to this title, please contact your librarian.
To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .
