Cortical vestibular representation in the superior temporal gyrus

2004 ◽  
Vol 14 (1) ◽  
pp. 33-35
Author(s):  
Stefan Hegemann ◽  
Sabine Fitzek ◽  
Clemens Fitzek ◽  
Michael Fetter
Keyword(s):  
Malignant Melanoma ◽  
Spatial Orientation ◽  
Superior Temporal Gyrus ◽  
Cerebral Metastasis ◽  
Subjective Visual Vertical ◽  
Medial Part ◽  
Unique Case ◽  
Visual Vertical

We present the unique case of a patient with a circumscribed solitary cerebral metastasis of a malignant melanoma extending from the medial part of the superior temporal gyrus to the lower part of the 1st long insular gyrus causing gait and stance instability and an ipsiversive tilt of the subjective visual vertical. Oculomotor disorders could not be detected. We suggest that the superior temporal gyrus is likely to be involved in spatial orientation presumably using otolithic information.

Interpretation of a Discontinuity in the Sense of Verticality at Large Body Tilt

2004 ◽  
Vol 91 (5) ◽  
pp. 2205-2214 ◽  
Author(s):  
Ronald G. Kaptein ◽  
Jan A. M. Van Gisbergen
Keyword(s):  
Spatial Orientation ◽  
Human Subjects ◽  
Large Body ◽  
Body Tilt ◽  
Head Orientation ◽  
Subjective Visual Vertical ◽  
Egocentric Bias ◽  
Visual Vertical ◽  
Series Of Experiments ◽  
Tilt Signal

Results of earlier spatial-orientation studies focusing on the sense of verticality have emphasized an intriguing paradox. Despite evidence that nearly veridical signals for gravicentric head orientation and egocentric visual stimulus orientation are available, roll-tilted subjects err in the direction of the long body axis when adjusting a visual line to vertical in darkness (Aubert effect). This has led to the suggestion that a central egocentric bias signal with fixed strength and direction acts to pull the perceived vertical to the subjects' zenith (M-model). In the present study, the subjective visual vertical (SVV) was tested in six human subjects, across the entire 360° range. For comparison, body-tilt estimates from four subjects where collected in a separate series of experiments. For absolute tilts up to ∼135°, SVV responses showed a gradually increasing Aubert effect that could not be attributed to errors in perceived body tilt but was nicely in line with the M-model. At larger absolute tilts, SVV errors abruptly reversed sign, now showing a pattern concordant with errors in body-tilt estimates but incompatible with the M-model. These results suggest that, in the normal working range, the perception of external space and the perception of body posture are based on different processing of body-tilt signals. Beyond this range, both spatial-orientation tasks seem to rely mainly on a common tilt signal.

Melanosarcoma (Malignant Melanoma) of the Rectosigmoid : Report of a Unique Case

1949 ◽  
Vol 12 (1) ◽  
pp. 142-145 ◽  
Author(s):  
Moses Behrend ◽  
Albert Behrend
Keyword(s):  
Malignant Melanoma ◽  
Unique Case

Topology of brainstem lesions associated with subjective visual vertical tilt

Neurology ◽  
2014 ◽  
Vol 82 (22) ◽  
pp. 1968-1975 ◽  
Author(s):  
T.-H. Yang ◽  
S.-Y. Oh ◽  
K. Kwak ◽  
J.-M. Lee ◽  
B.-S. Shin ◽  
...  
Keyword(s):  
Subjective Visual Vertical ◽  
Brainstem Lesions ◽  
Visual Vertical

scholarly journals The use of a neck brace does not influence visual vertical perception

2011 ◽  
Vol 69 (3) ◽  
pp. 509-512 ◽  
Author(s):  
Martha Funabashi ◽  
Natya N.L. Silva ◽  
Luciana M. Watanabe ◽  
Taiza E.G Santos-Pontelli ◽  
José Fernando Colafêmina ◽  
...  
Keyword(s):  
Healthy Volunteers ◽  
Healthy Subjects ◽  
Afferent Input ◽  
Subjective Visual Vertical ◽  
Sensory Receptors ◽  
Ocular Torsion ◽  
Vertical Orientation ◽  
Mean Values ◽  
Visual Vertical ◽  
The Mean

Subjective visual vertical (SVV) evaluates the individual's capacity to determine the vertical orientation. Using a neck brace (NB) allow volunteers' heads fixation to reduce cephalic tilt during the exam, preventing compensatory ocular torsion and erroneous influence on SVV result. OBJECTIVE: To analyze the influence of somatosensory inputs caused by a NB on the SVV. METHOD: Thirty healthy volunteers performed static and dynamic SVV: six measures with and six without the NB. RESULTS: The mean values for static SVV were -0.075º±1.15º without NB and -0.372º±1.21º with NB. For dynamic SVV in clockwise direction were 1.73º±2.31º without NB and 1.53º±1.80º with NB. For dynamic SVV in counterclockwise direction was -1.50º±2.44º without NB and -1.11º±2.46º with NB. Differences between measurements with and without the NB were not statistically significant. CONCLUSION: Although the neck has many sensory receptors, the use of a NB does not provide sufficient afferent input to change healthy subjects' perception of visual verticality.

scholarly journals Relationship between subjective visual vertical and balance in individuals with multiple sclerosis

2018 ◽  
Vol 24 (1) ◽  
pp. e1757 ◽  
Author(s):  
Brooke N. Klatt ◽  
Patrick J. Sparto ◽  
Lauren Terhorst ◽  
Stanley Winser ◽  
Rock Heyman ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Subjective Visual Vertical ◽  
Visual Vertical

Subclinical deviation of the subjective visual vertical in patients affected by a primary headache

2009 ◽  
Vol 129 (1) ◽  
pp. 30-35 ◽  
Author(s):  
Masayuki Asai ◽  
Mitsuhiro Aoki ◽  
Hisamitsu Hayashi ◽  
Nansei Yamada ◽  
Keisuke Mizuta ◽  
...  
Keyword(s):  
Primary Headache ◽  
Subjective Visual Vertical ◽  
Visual Vertical

scholarly journals Perception of the dynamic visual vertical during sinusoidal linear motion

2017 ◽  
Vol 118 (4) ◽  
pp. 2499-2506 ◽  
Author(s):  
A. Pomante ◽  
L. P. J. Selen ◽  
W. P. Medendorp
Keyword(s):  
Vestibular System ◽  
Spatial Orientation ◽  
Linear Acceleration ◽  
The Body ◽  
Body Motion ◽  
Whole Body ◽  
Linear Motion ◽  
Modeling Framework ◽  
Visual Vertical ◽  
The Brain

The vestibular system provides information for spatial orientation. However, this information is ambiguous: because the otoliths sense the gravitoinertial force, they cannot distinguish gravitational and inertial components. As a consequence, prolonged linear acceleration of the head can be interpreted as tilt, referred to as the somatogravic effect. Previous modeling work suggests that the brain disambiguates the otolith signal according to the rules of Bayesian inference, combining noisy canal cues with the a priori assumption that prolonged linear accelerations are unlikely. Within this modeling framework the noise of the vestibular signals affects the dynamic characteristics of the tilt percept during linear whole-body motion. To test this prediction, we devised a novel paradigm to psychometrically characterize the dynamic visual vertical—as a proxy for the tilt percept—during passive sinusoidal linear motion along the interaural axis (0.33 Hz motion frequency, 1.75 m/s2peak acceleration, 80 cm displacement). While subjects ( n=10) kept fixation on a central body-fixed light, a line was briefly flashed (5 ms) at different phases of the motion, the orientation of which had to be judged relative to gravity. Consistent with the model’s prediction, subjects showed a phase-dependent modulation of the dynamic visual vertical, with a subject-specific phase shift with respect to the imposed acceleration signal. The magnitude of this modulation was smaller than predicted, suggesting a contribution of nonvestibular signals to the dynamic visual vertical. Despite their dampening effect, our findings may point to a link between the noise components in the vestibular system and the characteristics of dynamic visual vertical.NEW & NOTEWORTHY A fundamental question in neuroscience is how the brain processes vestibular signals to infer the orientation of the body and objects in space. We show that, under sinusoidal linear motion, systematic error patterns appear in the disambiguation of linear acceleration and spatial orientation. We discuss the dynamics of these illusory percepts in terms of a dynamic Bayesian model that combines uncertainty in the vestibular signals with priors based on the natural statistics of head motion.

scholarly journals Contribution of Visual Input to the Subjective Visual Vertical During Prolonged Lateral Tilt Position

2010 ◽  
Vol 01 (01) ◽  
Author(s):  
Fumiyuki Goto ◽  
Tomoko Tsutumi ◽  
Hironari Kobayashi ◽  
Akira Saito ◽  
Jin Kanzaki
Keyword(s):  
Visual Input ◽  
Subjective Visual Vertical ◽  
Lateral Tilt ◽  
Visual Vertical
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