What does SEF mean in UNCLASSIFIED
Supplementary Eye Field (SEF) is a small region in the frontal cortex of the brain, specifically located in the dorsolateral prefrontal cortex. It is involved in the control of eye movements, particularly in the planning and execution of saccades. Saccades are rapid, voluntary eye movements that shift the gaze from one point to another.
SEF meaning in Unclassified in Miscellaneous
SEF mostly used in an acronym Unclassified in Category Miscellaneous that means Supplementary Eye Field
Shorthand: SEF,
Full Form: Supplementary Eye Field
For more information of "Supplementary Eye Field", see the section below.
Function of SEF
The SEF plays a crucial role in the following functions:
- Planning saccades: The SEF integrates information from various sensory modalities, such as visual, auditory, and proprioceptive cues, to determine the target location for a saccade.
- Initiating saccades: The SEF sends signals to the brainstem nuclei responsible for generating eye movement commands.
- Modulating saccades: The SEF can adjust the timing, amplitude, and velocity of saccades based on contextual factors, such as the presence of obstacles or the need for precise gaze control.
Neuroanatomy of SEF
The SEF is located bilaterally in the frontal cortex, adjacent to the frontal eye fields (FEF). It is subdivided into two main regions:
- Frontal SEF: Located near the FEF, it is involved in the planning and initiation of saccades.
- Parietal SEF: Located near the intraparietal sulcus, it is involved in the integration of visual and spatial information for saccade planning.
Clinical Significance
Dysfunction of the SEF can lead to a variety of oculomotor abnormalities, including:
- Saccadic dysmetria: Inability to accurately direct saccades to the target
- Saccadic slowing: Reduced speed of saccades
- Oculomotor apraxia: Difficulty in performing voluntary saccades
Conclusion
The Supplementary Eye Field is a vital brain region involved in the control of eye movements. It plays a crucial role in planning, initiating, and modulating saccades, allowing for precise and efficient gaze control. Understanding the function and neuroanatomy of the SEF is essential for comprehending the neural mechanisms underlying normal and abnormal eye movement behavior.
Essential Questions and Answers on Supplementary Eye Field in "MISCELLANEOUS»UNFILED"
What is the Supplementary Eye Field (SEF)?
The Supplementary Eye Field (SEF) is a small brain region located in the frontal lobe. It is involved in the control of eye movements, particularly those that require planning and coordination. The SEF is also involved in spatial attention, working memory, and decision-making.
What are the functions of the SEF?
The SEF is involved in several important functions, including:
- Eye movement control: The SEF is responsible for planning and coordinating eye movements, such as saccades (rapid eye movements), smooth pursuit movements (slow, continuous eye movements), and vergence movements (eye movements that converge on a target).
- Spatial attention: The SEF is involved in directing attention to specific locations in space. This is important for tasks such as visual search, reaching, and grasping.
- Working memory: The SEF is involved in storing and manipulating information in working memory. This is important for tasks such as planning and decision-making.
- Decision-making: The SEF is involved in making decisions, particularly those that require the integration of multiple pieces of information.
What happens if the SEF is damaged?
Damage to the SEF can lead to a variety of symptoms, including:
- Oculomotor deficits: Damage to the SEF can lead to deficits in eye movement control, such as difficulty making saccades or smooth pursuit movements.
- Spatial attention deficits: Damage to the SEF can lead to deficits in spatial attention, such as difficulty attending to specific locations in space.
- Working memory deficits: Damage to the SEF can lead to deficits in working memory, such as difficulty storing and manipulating information in mind.
- Decision-making deficits: Damage to the SEF can lead to deficits in decision-making, such as difficulty weighing the pros and cons of different options.
How is the SEF studied?
The SEF is studied using a variety of techniques, including:
- Brain imaging: Brain imaging techniques, such as fMRI and PET, can be used to visualize the SEF and measure its activity.
- Electrophysiology: Electrophysiology techniques, such as EEG and MEG, can be used to record the electrical activity of the SEF.
- Behavioral studies: Behavioral studies can be used to assess the effects of SEF damage on eye movements, spatial attention, working memory, and decision-making.
SEF also stands for: |
|
| All stands for SEF |