The cerebellar nodulus: Perceptual and ocular processing of graviceptive input
نویسندگان
چکیده
منابع مشابه
The cerebellar nodulus: perceptual and ocular processing of graviceptive input.
Current concepts postulate a decisive role of the cerebellar nodulus in the processing of otolith input. We hypothesized that nodular lesions abolish otolith-perceptual integration, predicting alignment of perceived direction of earth vertical with the z-axis of the head and not with gravity. In an 80-year-old patient with acute heminodular infarction, the subjective visual vertical deviated co...
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BACKGROUND The otolith-driven translational vestibulo-ocular reflex (tVOR) generates compensatory eye movements to linear head accelerations. Studies in humans indicate that the cerebellum plays a critical role in the neural control of the tVOR, but little is known about mechanisms of this control or the functions of specific cerebellar structures. Here, we chose to investigate the contribution...
متن کاملLesions of the cerebellar nodulus and uvula impair downward pursuit.
We studied sinusoidal (SIN) and step-ramp (SR) pursuit in two rhesus monkeys, before and after surgical lesions of the cerebellar nodulus and uvula (Nod/Uv). Eye movements were recorded using the magnetic field scleral search coil method. Pursuit targets were generated by an LCD projector and back-projected onto a tangent screen in an otherwise dark room. After the Nod/Uv lesions, both monkeys ...
متن کاملSpatiotemporal properties of optic flow and vestibular tuning in the cerebellar nodulus and uvula.
Convergence of visual motion and vestibular information is essential for accurate spatial navigation. Such multisensory integration has been shown in cortex, e.g., the dorsal medial superior temporal (MSTd) and ventral intraparietal (VIP) areas, but not in the parieto-insular vestibular cortex (PIVC). Whether similar convergence occurs subcortically remains unknown. Many Purkinje cells in verma...
متن کاملAcquired pendular nystagmus from cerebellar nodulus acute ischemic lesion.
A 71-year-old woman developed acute ataxia and oscillopsia, with underlying horizontal, binocular, conjugate pendular nystagmus (PN), with an amplitude of 4° in both eyes and a 3 Hz frequency, without gaze-evoked components. Brain MRI detected an altered signal in the nodular portion of cerebellar vermis, indicating cytotoxic edema (figure), due to an ischemic lesion. Acquired PN has been tradi...
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ژورنال
عنوان ژورنال: Annals of Neurology
سال: 2014
ISSN: 0364-5134
DOI: 10.1002/ana.24329