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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).
The walk-and-turn test is composed of two phases: the Instruction Phase and Walking Phase. During the test, the individual is directed to take nine steps along a straight line. The individual is supposed to walk heel to toe, and while looking down at a real or imaginary line, count the steps out loud. The test subject's arms must remain at ...
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 ...
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 ...
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.
DT: [5] The Determination Test (DT) is a test of reactive stress tolerance and the associated ability to react. The respondent is presented with color stimuli and acoustic signals. He/she reacts by pressing the appropriate buttons on the response panel. RT: [6] The Reaction Test (RT) provides a measurement of motor speed and reaction speed. The ...
I realize more needs to be added about the cortical and subcortical circuitry of pursuit, and it should really be cited more specifically. --Mahaffsp 00:13, 20 December 2006 (UTC) This page could greatly benefit from illustrations, perhaps a velocity profile of pursuit in response to a step-ramp target.
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