| 词汇 | saccade |
| 释义 | saccade noun[ C ] medical specializeduk /sækˈɑːd/ us /sækˈɑːd/ a quick movement of the eye that results in it looking in a different direction : 跳视 Her eyeballs showed continuous, involuntary, random saccades in all directions.她的眼球出现连续性、非自主、随机性的多方向跳视。 The saccade is probably the most rapid somatic movement that any muscle system in the body can produce.跳视大概是体内任何肌肉能产生的最快速的肌肉运动。 Saccades are measured by their amplitude and can vary in length. The saccade is the movement that occurs when the eye is looking for a new point of fixation. He had full extraocular muscle function when tracking movement, and saccades to targets within his intact field were normal. Eyesight, glasses & lenses accommodative afterimage age-related macular degeneration amaurosis amblyopia dispensing optician eyeglasses glaucoma lenticular limbus long-sighted long-sightedness macula macula lutea ocular oculist ophthalmology wet macular degeneration wraparounds yellow spot Examples of saccadesaccade This is true even when the target object in fact moves during the saccade. It is the relative strength of activity that determines the probability of selecting the next saccade target. They further make the interesting proposal that cognitive events only inhibit saccades, not trigger them. Subjects' data are ordered as a function of number of saccades. Oculomotor programming is influenced by the information in the word that is the target of the next saccade. This suggests that the decision to make a saccade is often made within the first 100 msec of a fixation. First, it is necessary to obtain the word-boundary information that is needed to program saccades to upcoming words. Finally, the length of each saccade is independent of both earlier processing and the length of prior saccades. Alternatively, the completion of early visual processing or attentional selection in the visual system might trigger saccade programs. The entire display subtended only 28 of the visual angle so that saccades could not be engaged during visual search for items to be counted. Of note for hypothesis 3, however, is that many infants show a weak positivity around or during the saccade. This provided the two behaviors we wanted to evaluate: fixation and saccades. The visuomotor index reflects the relative spike density when trials are aligned by saccade or by stimulus onset and is of heuristic value. Positive values indicate a neuron dominated by saccade-related activity whereas negative scores indicate a neuron more visual than motor. In all cases, fewer express saccades were made under the four-position condition than under the two-target position. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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