ISSN:
1432-2013
Keywords:
Frog Vestibulo-Ocular Reflex
;
Ocular Motoneurons
;
Reciprocal Innervation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary 1. Field and intracellular potentials were recorded in the abducens and oculomotor nuclei of the frog following stimulation of the anterior branch of the ipsi- and contralateral vestibular nerves. 2. Intracellular recordings from ocular motoneurons demonstrated that in frogs, as in higher vertebrates, there exists a reciprocal labyrinthine innervation of ocular motoneurons. For example, abducens motoneurons received inhibition and excitation from the ipsi- and contralateral VIIIth nerves, respectively. 3. Vestibular impulses arrived in the motor nuclei ca. 1.7 msec after VIIIth nerve stimulation, and the earliest EPSPs and IPSPs were produced in motoneurons ca. 2.5 msec after stimulation. These data suggest a disynaptic linkage between the VIIIth nerve and the ocular motor nuclei. 4. Removal of the cerebellum had no influence on the vestibular-evoked PSPs recorded in motoneurons. This finding suggested that the PSPs were produced through pathways running via the vestibular nuclei and the MLF to motoneurons.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00586625
