Responses to tilting of fibers of the frog's saccular nerve

1976 ◽  
Vol 366 (2-3) ◽  
pp. 143-146 ◽  
Author(s):  
J. Lannou ◽  
L. Cazin
Keyword(s):  
Saccular Nerve

scholarly journals Differential Spatial Organization of Otolith Signals in Frog Vestibular Nuclei

2003 ◽  
Vol 90 (5) ◽  
pp. 3501-3512 ◽  
Author(s):  
Hans Straka ◽  
Stefan Holler ◽  
Fumiyuki Goto ◽  
Florian P. Kolb ◽  
Edwin Gilland
Keyword(s):  
Spatial Organization ◽  
Vestibular Nucleus ◽  
Field Potential ◽  
Vestibular Function ◽  
Vestibular Nuclei ◽  
Second Order ◽  
Vestibular Neurons ◽  
Dorsal Nucleus ◽  
Sensory Map ◽  
Saccular Nerve

Activation maps of pre- and postsynaptic field potential components evoked by separate electrical stimulation of utricular, lagenar, and saccular nerve branches in the isolated frog hindbrain were recorded within a stereotactic outline of the vestibular nuclei. Utricular and lagenar nerve-evoked activation maps overlapped strongly in the lateral and descending vestibular nuclei, whereas lagenar amplitudes were greater in the superior vestibular nucleus. In contrast, the saccular nerve-evoked activation map coincided largely with the dorsal nucleus and the adjacent dorsal part of the lateral vestibular nucleus, corroborating a major auditory and lesser vestibular function of the frog saccule. The stereotactic position of individual second-order otolith neurons matched the distribution of the corresponding otolith nerve-evoked activation maps. Furthermore, particular types of second-order utricular and lagenar neurons were clustered with particular types of second-order canal neurons in a topology that anatomically mirrored the preferred convergence pattern of afferent otolith and canal signals in second-order vestibular neurons. Similarities in the spatial organization of functionally equivalent types of second-order otolith and canal neurons between frog and other vertebrates indicated conservation of a common topographical organization principle. However, the absence of a precise afferent sensory topography combined with the presence of spatially segregated groups of particular second-order vestibular neurons suggests that the vestibular circuitry is organized as a premotor map rather than an organotypical sensory map. Moreover, the conserved segmental location of individual vestibular neuronal phenotypes shows linkage of individual components of vestibulomotor pathways with the underlying genetically specified rhombomeric framework.

Properties of central vestibular neurons fired by stimulation of the saccular nerve

1978 ◽  
Vol 143 (2) ◽  
pp. 251-261 ◽  
Author(s):  
V.J. Wilson ◽  
R.R. Gacek ◽  
Y. Uchino ◽  
A.J. Susswein
Keyword(s):  
Vestibular Neurons ◽  
Saccular Nerve ◽  
Stimulation Of

Eye movements evoked by selective saccular nerve stimulation in cats

2004 ◽  
Vol 31 (3) ◽  
pp. 220-225 ◽  
Author(s):  
Fumiyuki Goto ◽  
Hui Meng ◽  
Rishu Bai ◽  
Hitoshi Sato ◽  
Midori Imagawa ◽  
...  
Keyword(s):  
Eye Movements ◽  
Nerve Stimulation ◽  
Saccular Nerve

scholarly journals Sacculocollic Reflex Arcs in Cats

1997 ◽  
Vol 77 (6) ◽  
pp. 3003-3012 ◽  
Author(s):  
Y. Uchino ◽  
H. Sato ◽  
M. Sasaki ◽  
M. Imagawa ◽  
H. Ikegami ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Nerve Stimulation ◽  
Vestibular Nerve ◽  
The Body ◽  
Lateral Part ◽  
Intracellular Recordings ◽  
Decerebrate Cat ◽  
Postsynaptic Potentials ◽  
Saccular Nerve ◽  
Sacculocollic Reflex

Uchino, Y., H. Sato, M. Sasaki, M. Imagawa, H. Ikegami, N. Isu, and W. Graf. Sacculocollic reflex arcs in cats. J. Neurophysiol. 77: 3003–3012, 1997. Neuronal connections and pathways underlying sacculocollic reflexes were studied by intracellular recordings from neck extensor and flexor motoneurons in decerebrate cat. Bipolar electrodes were placed within the left saccular nerve, whereas other branches of the vestibular nerve were removed in the inner ear. To prevent spread of stimulus current to other branches of the vestibular nerve, the saccular nerve and the electrodes were covered with warm semisolid paraffin-Vaseline mixture. Saccular nerve stimulation evoked disynaptic (1.8–3.0 ms) excitatory postsynaptic potentials (EPSPs) in ipsilateral neck extensor motoneurons and di- or trisynaptic (1.8–4.0 ms) EPSPs in contralateral neck extensor motoneurons, and di- and trisynaptic (1.7–3.6 ms) inhibitory postsynaptic potentials (IPSPs) in ipsilateral neck flexor motoneurons and trisynaptic (2.7–4.0 ms) IPSPs in contralateral neck flexor motoneurons. Ipsilateral inputs were about twice as strong as contralateral ones to both extensor and flexor motoneurons. To determine the pathways mediating this connectivity, the lateral part of the spinal cord containing the ipsilateral lateral vestibulospinal tract (i-LVST) or the central part of the spinal cord containing the medial vestibulospinal tracts (MVSTs) and possibly reticulospinal fibers (RSTs) were transected at the caudal end of the C1 segment. Subsequent renewed intracellular recordings following sacculus nerve stimulation indicated that the pathway from the saccular nerve to the ipsilateral neck extensor motoneurons projects though the i-LVST, whereas the pathways to the contralateral neck extensors and to the bilateral neck flexor motoneurons descend in the MVSTs/RSTs. Our data show that sacculo-neck reflex connections display a qualitatively bilaterally symmetrical innervation pattern with excitatory connections to both neck extensor motoneuron pools, and inhibitory connections to both neck flexor motoneuron pools. This bilateral organization contrasts with the unilateral innervation scheme of the utriculus system. These results suggest a different symmetry plane along which sacculus postural reflexes are organized, thus supplementing the reference planes of the utriculus system and allowing the gravistatic system to represent all three translational spatial degrees of freedom. We furthermore suggest that the sacculocollic reflex plays an important role in maintaining the relative position of the head and the body against the vertical linear acceleration of gravity.

Properties of utricular and saccular nerve-activated vestibulocerebellar neurons in cats

2000 ◽  
Vol 134 (1) ◽  
pp. 1-8 ◽  
Author(s):  
S. Ono ◽  
K. Kushiro ◽  
M. Zakir ◽  
H. Meng ◽  
H. Sato ◽  
...  
Keyword(s):  
Saccular Nerve

Preservation of the Saccular Nerve and of the Vestibular Evoked Myogenic Potential During Vestibular Schwannoma Surgery

2003 ◽  
Vol 24 (2) ◽  
pp. 308-311 ◽  
Author(s):  
Giuseppe Magliulo ◽  
Mario Gagliardi ◽  
Giuseppe Ciniglio Appiani ◽  
Raffaello D'Amico
Keyword(s):  
Vestibular Schwannoma ◽  
Vestibular Evoked Myogenic Potential ◽  
Myogenic Potential ◽  
Saccular Nerve

Organized projection of the goldfish saccular nerve onto the Mauthner cell lateral dendrite

1983 ◽  
Vol 274 (2) ◽  
pp. 319-324 ◽  
Author(s):  
Jen-Wei Lin ◽  
Donald S. Faber ◽  
Malcolm R. Wood
Keyword(s):  
Mauthner Cell ◽  
Lateral Dendrite ◽  
Saccular Nerve

Potassium-evoked release of endogenous primary amine-containing compounds from the trout saccular macula and saccular nerve in vitro

1987 ◽  
Vol 417 (1) ◽  
pp. 39-50 ◽  
Author(s):  
Marian J. Drescher ◽  
Dennis G. Drescher ◽  
James S. Hatfield
Keyword(s):  
Primary Amine ◽  
Saccular Nerve
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