Postsynaptic Motor Neuron Research Articles

Coverage by axosomatic boutons varies directly with the diameter of the postsynaptic motor neuron in the trigeminal nucleus of the rat

Coverage by axosomatic boutons varies directly with the diameter of the postsynaptic motor neuron in the trigeminal nucleus of the rat

Synaptic potentials effect the release of transmitter from locust nonspiking interneurons.

An excitatory synaptic potential in a local nonspiking interneuron of a locust is able to effect the release of chemical transmitter. The consequence is that a discrete inhibitory synaptic potential is evoked in an identified postsynaptic motoneuron. These local interactions between interneurons and motoneurons are of behavioral significance in that they ensure the correct operation of a resistance reflex.

Anatomy and physiology of goldfish oculomotor system. I. Structure of abducens nucleus

ArticlesAnatomy and physiology of goldfish oculomotor system. I. Structure of abducens nucleusP. SterlingP. SterlingPublished Online:01 May 1977https://doi.org/10.1152/jn.1977.40.3.557MoreSectionsPDF (4 MB)Download PDF ToolsExport citationAdd to favoritesGet permissionsTrack citations ShareShare onFacebookTwitterLinkedInEmailWeChat Previous Back to Top Next Download PDF FiguresReferencesRelatedInformationCited ByVestibuloocular Reflex of the Adult Flatfish. III. A Species-Specific Reciprocal Pattern of Excitation and InhibitionWerner Graf, Robert Spencer207, Harriet Baker, and Robert Baker1 September 2001 | Journal of Neurophysiology, Vol. 86, No. 3Excitatory and Inhibitory Vestibular Pathways to the Extraocular Motor Nuclei in GoldfishWerner Graf, Robert Spencer, Harriet Baker, and Robert Baker1 May 1997 | Journal of Neurophysiology, Vol. 77, No. 5A morphological study of abducens nucleus motoneurons and internuclear neurons in the goldfish (Carassius auratus)Brain Research Bulletin, Vol. 28, No. 1Mixed-junction axon terminals on identified principal abducens motoneurons in the monitor lizardBrain Research, Vol. 463, No. 1A note on a tectal neuron projecting via the tectobulbar tract in teleostsNeuroscience Letters, Vol. 59, No. 3The effects of lowered temperature on spontaneous eye movements in a Teleost fishComparative Biochemistry and Physiology Part A: Physiology, Vol. 75, No. 3Coverage by axosomatic boutons varies directly with the diameter of the postsynaptic motor neuron in the trigeminal nucleus of the ratBrain Research, Vol. 189, No. 1 More from this issue > Volume 40Issue 3May 1977Pages 557-572 Copyright & PermissionsCopyright © 1977 the American Physiological Societyhttps://doi.org/10.1152/jn.1977.40.3.557PubMed195018History Published online 1 May 1977 Published in print 1 May 1977 Metrics

A quantitative analysis of the response of presynaptic boutons to postsynaptic motor neuron axotomy

The left hypoglossal nucleus was examined by electron microscopy in normal rats, and rats from 7–84 days after axotomy of the left hypoglossal nerve. Boutons of different types were counted on micrograph samples. Boutons with clear spherical vesicles decreased in number from 7 to 35 days after axotomy, if somatic, or from 21 to 35 days if in the neuropil. Restitution of boutons followed nerve regeneration. Boutons with flat or mixed vesicles were unaffected by axotomy. Synaptic thickenings were lost from neuropil boutons prior to the decrease in bouton number, and the thickenings were not regained until after the bouton numbers began recovery. During the retractive phase, there was a significant increase in the number of boutons and dendrites with unusual inclusions suggesting surface membrane activity. The results were interpreted as indicating loss (possibly by involution) and restoration of excitatory boutons without alteration of inhibitory terminals.