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"Lack of Smooth Pursuit" is a scorable clue on the NHTSA's standardized field sobriety tests. The clue, in combination with others, may be used to determine if a person is impaired by alcohol and/or drugs. Drugs causing lack of smooth pursuit include depressants, some inhalants, and dissociative anesthetics (such as phencyclidine or ketamine).
Conjugate eye movements can be in any direction, and can accompany both saccadic eye movements and smooth pursuit eye movements. [1] Conjugate eye movements are used to change the direction of gaze without changing the depth of gaze. This can be used to either follow a moving object, or change focus entirely.
Trace of saccades of the human eye on a face while scanning Saccades during observation of a picture on a computer screen. A saccade (/ s ə ˈ k ɑː d / sə-KAHD; French:; French for 'jerk') is a quick, simultaneous movement of both eyes between two or more phases of focal points in the same direction. [1]
Primates and many other vertebrates use three types of voluntary eye movement to track objects of interest: smooth pursuit, vergence shifts [1] and saccades. [2] These types of movements appear to be initiated by a small cortical region in the brain's frontal lobe. [3] [4] This is corroborated by removal of the frontal lobe. In this case, the ...
The resulting series of fixations and saccades is called a scanpath. Smooth pursuit describes the eye following a moving object. Fixational eye movements include microsaccades: small, involuntary saccades that occur during attempted fixation. Most information from the eye is made available during a fixation or smooth pursuit, but not during a ...
Best Free Weight Exercises: Let’s embed 25 workout loops, following our typical format for each (A blurb about why the move is awesome and what muscles it works), and a how to numbered list of ...
Though slow nystagmus closely resembles smooth pursuit eye movements, it is distinct; several species that do not exhibit smooth pursuit nonetheless have slow nystagmus during OKR (though in humans, it is possible to substitute slow nystagmus for smooth pursuit during a version of OKR referred to as "look nystagmus", in which subjects are ...
The same neural integrators also generate eye position for other conjugate eye movements such as saccades and smooth pursuit. The integrator is leaky, with a characteristic leaking time of 20 s. For example, when the subject is sitting still and focusing on an object, and suddenly the light is turned off, the eyes would return to their neutral ...