Properties of saccular nerve-activated vestibulospinal neurons in cats

1997 ◽  
Vol 116 (3) ◽  
pp. 381-388 ◽  
Author(s):  
H. Sato ◽  
Midori Imagawa ◽  
Naoki Isu ◽  
Yoshio Uchino
Keyword(s):  
Vestibulospinal Neurons ◽  
Saccular Nerve

Neurogenetical segregation of the vestibulospinal neurons in the rat

1993 ◽  
Vol 620 (1) ◽  
pp. 149-154 ◽  
Author(s):  
Yasuko Kitao ◽  
Shigeo Okoyama ◽  
Tetsuji Moriizumi ◽  
Motoi Kudo
Keyword(s):  
Vestibulospinal Neurons

Spatial Alignment of Rotational and Static Tilt Responses of Vestibulospinal Neurons in the Cat

1999 ◽  
Vol 82 (2) ◽  
pp. 855-862 ◽  
Author(s):  
S. I. Perlmutter ◽  
Y. Iwamoto ◽  
J. F. Baker ◽  
B. W. Peterson
Keyword(s):  
Horizontal Plane ◽  
Dimensional Space ◽  
Body Position ◽  
Three Dimensional ◽  
Whole Body ◽  
Angular Difference ◽  
Spatial Alignment ◽  
Minimum Sensitivity ◽  
Alert Cats ◽  
Vestibulospinal Neurons

The responses of vestibulospinal neurons to 0.5-Hz, whole-body rotations in three-dimensional space and static tilts of whole-body position were studied in decerebrate and alert cats. The neurons’ spatial properties for earth-vertical rotations were characterized by maximum and minimum sensitivity vectors ( R max and R min) in the cat’s horizontal plane. The orientation of a neuron’s R max was not consistently related to the orientation of its maximum sensitivity vector for static tilts ( T max). The angular difference between R max and T max was widely distributed between 0° and 150°, and R max and T max were aligned (i.e., within 45° of each other) for only 44% (14/32) of the neurons. The alignment of R max and T max was not correlated with the neuron’s sensitivity to earth-horizontal rotations, or to the orientation of R max in the horizontal plane. In addition, the extent to which a neuron exhibited spatiotemporal convergent (STC) behavior in response to vertical rotations was independent of the angular difference between R max and T max. This suggests that the high incidence of STC responses in our sample (56%) reflects not only canal-otolith convergence, but also the presence of static and dynamic otolith inputs with misaligned directionality. The responses of vestibulospinal neurons reflect a complex combination of static and dynamic vestibular inputs that may be required by postural reflexes that vary depending on head, trunk, and limb orientation, or on the frequency of stimulation.

Axonal pathways and projection levels of anterior semicircular canal nerve-activated vestibulospinal neurons in cats

2006 ◽  
Vol 406 (1-2) ◽  
pp. 1-5 ◽  
Author(s):  
Naoharu Kitajima ◽  
Akemi Sugita-Kitajima ◽  
Rishu Bai ◽  
Mitsuyoshi Sasaki ◽  
Hitoshi Sato ◽  
...  
Keyword(s):  
Semicircular Canal ◽  
Anterior Semicircular Canal ◽  
Vestibulospinal Neurons

Properties and axonal trajectories of posterior semicircular canal nerve-activated vestibulospinal neurons

2008 ◽  
Vol 191 (3) ◽  
pp. 257-264 ◽  
Author(s):  
Keisuke Kushiro ◽  
Rishu Bai ◽  
Naoharu Kitajima ◽  
Akemi Sugita-Kitajima ◽  
Yoshio Uchino
Keyword(s):  
Semicircular Canal ◽  
Posterior Semicircular Canal ◽  
Vestibulospinal Neurons

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.

scholarly journals Firing Patterns of Rat Vestibulospinal Neurons during Quadrupedal Standing on a Pitching Platform

2006 ◽  
Vol 56 (5) ◽  
pp. 389-392
Author(s):  
S. Fujiwara ◽  
T. Saito ◽  
F. Tian ◽  
T. Yamaguchi
Keyword(s):  
Firing Patterns ◽  
Vestibulospinal Neurons
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