Electrical stimulation of the eighth nerve in cat: Temporal properties of unit responses in the large spherical cell region of the AVCN

1981 ◽  
Vol 69 (S1) ◽  
pp. S97-S97 ◽  
Author(s):  
M. W. White ◽  
M. M. Merzenich ◽  
G. E. Loeb
Keyword(s):  
Electrical Stimulation ◽  
Spherical Cell ◽  
Cell Region ◽  
Eighth Nerve ◽  
Temporal Properties ◽  
Large Spherical ◽  
Stimulation Of

scholarly journals Temporal Properties of Visual Perception on Electrical Stimulation of the Retina

2012 ◽  
Vol 53 (6) ◽  
pp. 2720 ◽  
Author(s):  
Angélica Pérez Fornos ◽  
Jörg Sommerhalder ◽  
Lyndon da Cruz ◽  
Jose Alain Sahel ◽  
Saddek Mohand-Said ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Visual Perception ◽  
Temporal Properties ◽  
Stimulation Of

scholarly journals Spatial and temporal properties of eye movements produced by electrical stimulation of semicircular canal afferents

2012 ◽  
Vol 108 (5) ◽  
pp. 1511-1520 ◽  
Author(s):  
Richard F. Lewis ◽  
Csilla Haburcakova ◽  
Wangsong Gong ◽  
Faisal Karmali ◽  
Daniel M. Merfeld
Keyword(s):  
Electrical Stimulation ◽  
Eye Movements ◽  
Semicircular Canal ◽  
Low Frequency ◽  
Velocity Storage ◽  
Rotational Axis ◽  
Temporal Properties ◽  
Normal Manner ◽  
Semicircular Canal Afferents ◽  
Stimulation Of

To investigate the characteristics of eye movements produced by electrical stimulation of semicircular canal afferents, we studied the spatial and temporal features of eye movements elicited by short-term lateral canal stimulation in two squirrel monkeys with plugged lateral canals, with the head upright or statically tilted in the roll plane. The electrically induced vestibuloocular reflex (eVOR) evoked with the head upright decayed more quickly than the stimulation signal provided by the electrode, demonstrating an absence of the classic velocity storage effect that improves the dynamics of the low-frequency VOR. When stimulation was provided with the head tilted in roll, however, the eVOR decayed more rapidly than when the head was upright, and a cross-coupled vertical response developed that shifted the eye's rotational axis toward alignment with gravity. These results demonstrate that rotational information provided by electrical stimulation of canal afferents interacts with otolith inputs (or other graviceptive cues) in a qualitatively normal manner, a process that is thought to be mediated by the velocity storage network. The observed interaction between the eVOR and graviceptive cues is of critical importance for the development of a functionally useful vestibular prosthesis. Furthermore, the presence of gravity-dependent effects (dumping, spatial orientation) despite an absence of low-frequency augmentation of the eVOR has not been previously described in any experimental preparation.

ADENOHYPOPHYSEAL LH CONTENT IN NORMAL, ANDROGEN-STERILIZED AND PROGESTERONE-PRIMED STERILE FEMALE RATS

1962 ◽  
Vol 39 (1) ◽  
pp. 13-21 ◽  
Author(s):  
Roger A. Gorski ◽  
Charles A. Barraclough
Keyword(s):  
Ascorbic Acid ◽  
Electrical Stimulation ◽  
Quantitative Determination ◽  
Median Eminence ◽  
Hypothalamic Stimulation ◽  
Female Rats ◽  
Rat Pituitary ◽  
Gland Content ◽  
Stimulation Of

ABSTRACT We have previously suggested that the failure of the androgen-sterilized, persistent-oestrous rat to ovulate, following electrical stimulation of the median eminence structures of the hypothalamus, is due to an insufficiency in adenohypophyseal LH concentration. Using the ovarian ascorbic acid technique for quantitative determination of pituitary LH content, the present studies have demonstrated that the sterile rat pituitary gland contains one-third the LH content of the normal prooestrous gland. Furthermore, not only does progesterone priming of this persistent-oestrous rat result in a 75 % increase in LH concentration, but on hypothalamic stimulation sufficient LH is released to induce ovulation. The decrease in LH concentration which accompanies ovulation in the progesterone-primed, sterile rat is approximately 45 % of the total gland content as compared with a 51 % decrease in pituitary content in the normal cyclic rat.

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