2017年5月20日 · The catch up saccade indicates peripheral vestibular hypofunction on the side towards which the head was rotated (Figure). The video is of a patient with acute left vestibular neuritis. The head impulse is positive toward the left.

2025年3月20日 · Catch-up saccades correct gaze position when smooth pursuit falls short, ensuring clear vision during motion. These rapid, corrective movements help maintain focus on dynamic targets. Understanding their function offers insight into both normal visual processing and neurological disorders affecting eye movement.

2023年5月30日 · Abnormal catch-up saccades are the most important sign of a lesion involving the ipsilateral semicircular canal or its afferent neural pathway. Unfortunately, the criteria for abnormal catch-up saccades are still emerging. To interpret catch-up saccades, consider the following items: Frequency; Direction; Latency; Velocity Frequency

In the early stages of a vestibular deficit, patients mostly produce visually guided catch-up saccades to bring the image of the target back onto their fovea after the head movement (hence also called overt saccades).

2022年11月15日 · The video head impulse test (vHIT) assesses the vestibulo-ocular reflex (VOR) during a rapid high-velocity low amplitude (10°–20°) head rotation. Patients with peripheral vestibulopathy have a reduced VOR gain with corrective catch-up saccades during the head turn.

2021年3月2日 · "Covert" saccades are made earlier than head velocity returning to 0, usually during the high velocity part of the head movement. As covert saccades are made prior to the head coming to rest there must be some predictive aspect to them.

2015年11月1日 · Catch-up saccades are indirect signs of a VOR deficit. They can occur after the head movement (overt catch-up saccades) or during the head movement (covert catch-up saccades, see Figure 2). Only overt catch-up saccades can be seen in the clinical HIT.

Another outcome of vHIT is the presence of corrective saccades (CS). With vHIT, both gain and CS can be objectively measured. CS can be characterized by their amplitude (velocity), latency and frequency.

2024年12月18日 · Objectives: Catch-up saccades help to compensate for loss of gaze stabilization during rapid head rotation in case of vestibular deficit.

2008年2月4日 · Initial catch-up saccades can occur during or after head rotation. Covert saccades during head rotation are most likely imperceptible, while overt saccades after head rotation are detectable by clinicians.