25 26 The mechanics of the eyeball and orbital tissues (the “ocular motor plant”) are a 27 fundamental determinant of ocular motor signal processing. The mouse is used 28 increasingly in ocular motor physiology, but little is known about its plant mechanics. 29 One way to characterize the mechanics is to determine relationships between extraocular 30 motoneuron firing and eye movement. We recor...

BACKGROUND Treatment of Chiari malformation can include suboccipital decompression with resection of one cerebellar tonsil. Its effects on ocular motor and cerebellar function have not yet been systematically examined. OBJECTIVE To investigate whether decompression, including resection of one cerebellar tonsil, leads to ocular motor, vestibular, or cerebellar deficits. PATIENTS AND METHODS ...

BACKGROUND AND PURPOSE High-resolution MR imaging enables direct imaging of the ocular motor nerves. The aim of this study was to assess the various causes of congenital or developmental neuropathic strabismus by using high-resolution MR imaging. MATERIALS AND METHODS High-resolution MR imaging was performed to evaluate the ocular motor nerves (CNIII, CNIV, CNVI) in 247 consecutive patients w...

The practice of ophthalmology and psychiatry meet over in several aspects of patient diagnosis, management & therapy. The ophthalmologists should be able to recognise signs and symptoms of psychiatric disorder. Non organic disorders could have ophthalmologic manifestations related both the afferent system and motor system related symptoms. Ophthalmologist should be aware of conditions like func...

lated by a high level of coordination between sensory and motor functions which center stationary or moving objects in the central retina (fovea). The securing and stabilization of object images on the fovea during head movement are the basic functions of eye movements (1). Recent advances in the techniques of magnetic resonance (MR) imaging have opened a new horizon for the evaluation of ocula...

Because the oscillatory eye movements of congenital nystagmus vary from cycle to cycle, there is no clear relationship between the waveform produced and the underlying abnormality of the ocular motor system. We consider the durations of successive cycles of nystagmus which could be (1) completely determined by the lengths of the previous cycles, (2) completely independent of the lengths of the ...

We studied the eye movements of several members of a family of Belgian sheepdogs that includes achiasmatic mutants. Our aim was to identify the types of nystagmus and other ocular motor abnormalities exhibited by the mutants. We also recorded from several unaffected heterozygous carriers of the genetic mutation and from a normal Irish Setter. Mutant dogs exhibited nystagmus waveforms that were ...

Introduction: Research indicates Sports-Related Concussion (SRC) impairs Vestibular-Ocular-Motor (VOM) function. The aim was to explore if VOM impairment correlates with longer Return To Play (RTP), symptom burden, neurocognitive performance and academic capability.Participants: 40 (61.4% male) Loughborough University, UK, rugby union student-athletes who sustained 42 SRCs.Methods: Student-athl...

The ocular-following response is a slow tracking eye movement that is elicited by sudden drifting movements of a large-field visual stimulus in primates. It helps to stabilize the eyes on the visual scene. Previous single unit recordings and chemical lesion studies have reported that the ocular-following response is mediated by a pathway that includes the medial superior temporal (MST) area of ...