Smooth Pursuit
Smooth pursuit eye movements allow the eyes to closely follow a moving object. It is one of two ways that visual animals can voluntarily shift gaze, the other being saccadic eye movements. Pursuit differs from the vestibulo-ocular reflex, which only occurs during movements of the head and serves to stabilize gaze on a stationary object. Most people are unable to initiate pursuit without a moving visual signal. The pursuit of targets moving with velocities of greater than 30°/s tend to require catch-up saccades. Smooth pursuit is asymmetric: most humans and primates tend to be better at horizontal than vertical smooth pursuit, as defined by their ability to pursue smoothly without making catch-up saccades. Most humans are also better at downward than upward pursuit. Pursuit is modified by ongoing visual feedback.
Read more about Smooth Pursuit: Measurement, Neural Circuitry, Stages of Smooth Pursuit, Smooth Pursuit and Spatial Attention, Smooth Pursuit in The Absence of A Visual Target, Distinction Between Smooth Pursuit, Optokinetic Nystagmus, and Ocular Following Response, Smooth-pursuit Deficits
Famous quotes containing the words smooth and/or pursuit:
“The island dreams under the dawn
And great boughs drop tranquillity;
The peahens dance on a smooth lawn,
A parrot sways upon a tree,
Raging at his own image in the enamelled sea.”
—William Butler Yeats (1865–1939)
“The necessary has never been man’s top priority. The passionate pursuit of the nonessential and the extravagant is one of the chief traits of human uniqueness. Unlike other forms of life, man’s greatest exertions are made in the pursuit not of necessities but of superfluities.”
—Eric Hoffer (1902–1983)