Oculomotor Properties
Oculomotor Properties - Related Videos
04:29
Ex Vivo Culture and Imaging of Oculomotor Slices from Transgenic Mouse Embryos
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2025
This video demonstrates the ex vivo culture and imaging of oculomotor slices from transgenic mouse embryos. The embryos are isolated and embedded in agarose. Using a vibratome, slices containing the oculomotor nuclei and eyes are obtained. The slices are maintained in culture and imaged using a fluorescence microscope.
10:41
VisualEyes: A Modular Software System for Oculomotor Experimentation
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Cited by 28 •
2011
Neural control and cognitive processes can be studied through eye movements. The VisualEyes software allows an operator to program stimuli on two computer screens independently using a simple, custom scripting language. The system can stimulate tandem eye movements (saccades and smooth pursuit) or opposing eye movements (vergence) or any combination.
05:51
VisioTracker, an Innovative Automated Approach to Oculomotor Analysis
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Cited by 29 •
2011
The VisioTracker is an automated system for the quantitative analysis of visual performance of larval and small adult fish based on the recording of eye movements. It features full control over visual stimulus properties and real-time analysis, enabling high-throughput research in fields such as visual system development and function, pharmacology, neural circuit studies and sensorimotor integration.
07:57
Isolation and Culture of Oculomotor, Trochlear, and Spinal Motor Neurons from a Mouse Embryo
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2025
The video demonstrates the isolation of oculomotor, trochlear, and spinal motor neurons from a transgenic mouse embryo. The embryo expresses motor neurons labeled with a green fluorescent protein (GFP) for easy visualization and identification. The motor neurons are surgically isolated under a fluorescence microscope and maintained in a culture medium.
06:04
Ex Vivo Oculomotor Slice Culture from Embryonic GFP-Expressing Mice for Time-Lapse Imaging of Oculomotor Nerve Outgrowth
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Cited by 6 •
2019
An ex vivo slice assay allows oculomotor nerve outgrowth to be imaged in real time. Slices are generated by embedding E10.5 IslMN:GFP embryos in agarose, slicing on a vibratome, and growing in a stage-top incubator. The role of axon guidance pathways is assessed by adding inhibitors to the culture media.
FAQs
Eye-movement performance reflects coordinated activity across several control levels rather than a single structure. The extraocular muscles execute movement, cranial nerves transmit motor commands, brainstem circuits organize essential eye-movement functions, and higher cortical regions contribute to voluntary control. Examining the resulting direction, speed, accuracy, coordination, and stability can therefore help connect an observed abnormality with its underlying control system.
These eye-movement functions represent distinct aspects of visual and neurological control. Fixation tests stability, saccades provide information about rapid repositioning, smooth pursuit examines coordinated tracking, and vergence addresses coordinated changes between the eyes. Considering them separately helps clinicians identify whether dysfunction is broad or more selective, improving interpretation of the overall oculomotor profile.
Direction, speed, accuracy, coordination, and stability each describe a different dimension of performance. A problem in one dimension may provide different information from a problem affecting several dimensions together. Because these properties depend on muscles, cranial nerves, brainstem circuits, and cortical regions, their pattern can help characterize visual dysfunction and support neurological localization.
Clinical testing examines how the eyes perform fixation, saccades, smooth pursuit, and vergence while considering movement direction, speed, accuracy, coordination, and stability. The examiner uses this combined profile rather than relying on one isolated feature. This approach provides structured information about visual and neurological function and can reveal patterns that warrant further evaluation.
Abnormal eye movements may reflect disruption at different points in the control system, including the extraocular muscles, cranial nerves, brainstem circuits, or higher cortical regions. Clinicians compare the observed pattern of movement performance with the functions supported by these structures. This can help characterize dysfunction and narrow the neurological location involved, although interpretation occurs within the broader clinical assessment.
These assessments are useful when a condition affects the brain, cranial nerves, or eye muscles and when clinicians need objective information about visual or neurological function. Baseline findings can contribute to treatment planning, while repeated evaluations can show whether movement performance changes over time. Tracking direction, speed, accuracy, coordination, and stability supports evaluation of recovery.