The optokinetic reflex (OKR), also referred to as the optokinetic response, or optokinetic nystagmus (OKN), is a compensatory reflex that supports visual...
17 KB (2,013 words) - 04:14, 26 May 2025
After rotation of the eyes, the animal showed a reinforcement of the optokinetic response in the same direction as the moving visual input. Von Holst and Mittelstaedt...
25 KB (3,180 words) - 09:58, 25 May 2025
An optokinetic drum—also called Catford drum—is a rotating instrument to test vision in which individuals are seated facing the wall of the drum. The...
2 KB (213 words) - 21:21, 2 December 2024
brain stem, not in the visual cortex. Thus someone can have a normal optokinetic response and yet be cortically blind with no conscious visual sensation. Visual...
62 KB (7,723 words) - 20:58, 6 April 2025
In animals, including humans, the startle response is a largely unconscious defensive response to sudden or threatening stimuli, such as sudden noise or...
14 KB (1,729 words) - 03:56, 26 May 2025
Videonystagmography (section Optokinetic test)
collected, see: https://www.youtube.com/watch?v=BqDMuze0XZ8. Optokinetic testing assesses a response that occurs when trying to stabilize focus on a target...
6 KB (668 words) - 11:23, 12 January 2025
including Columbiformes, Galliformes, and Gruiformes. Head-bobbing is an optokinetic response which stabilizes a bird's surroundings as it alternates between a...
82 KB (9,617 words) - 18:17, 23 May 2025
ISBN 978-0-19-953978-9. Sperry RW (December 1950). "Neural basis of the spontaneous optokinetic response produced by visual inversion". Journal of Comparative and Physiological...
7 KB (867 words) - 00:02, 8 November 2023
Sopite syndrome (section Optokinetic drum)
study in which the optokinetic drum was used to test the symptoms of the sopite syndrome showed increased mood changes in response to the visual cues...
15 KB (2,000 words) - 16:13, 5 September 2024
has no influence over higher-order motion responses like the optomotor response or the optokinetic response, but may be more integral to lower-order cues...
57 KB (7,267 words) - 17:41, 23 May 2025
Human eye (section Optokinetic)
is another point of reference for determining speed. The optokinetic reflex (or optokinetic nystagmus) stabilizes the image on the retina through visual...
80 KB (9,535 words) - 18:14, 23 May 2025
primarily in mediating behavioral responses to acute changes in ambient light such as the pupillary light reflex, the optokinetic reflex, and temporary changes...
19 KB (2,168 words) - 22:39, 30 May 2024
Smooth pursuit (section Distinction between smooth pursuit, optokinetic nystagmus, and ocular following response)
tracking eye movements like the slow phase of the optokinetic nystagmus and the ocular following response (OFR), discovered in 1986 by Miles, Kawano, and...
20 KB (2,541 words) - 17:05, 9 December 2024
mechanism for focal points, rapid eye movement, and the fast phase of optokinetic nystagmus. The word appears to have been coined in the 1880s by French...
29 KB (3,795 words) - 01:57, 24 May 2025
International Society for Clinical Electrophysiology of Vision Nystagmus Optokinetic drum Orthoptist Creel, Donnell J. (1995), Kolb, Helga; Fernandez, Eduardo;...
6 KB (629 words) - 19:23, 13 May 2025
reflex is a gaze stabilization reflex that occurs in birds in response to visual (optokinetic) inputs, and leads to head movements that compensate for passive...
977 bytes (111 words) - 04:04, 21 December 2020
track's motion on the retina is too fast for the eye to compensate with optokinetic tracking. Then, one starts looking to the left and right along the track...
12 KB (1,336 words) - 07:38, 14 March 2025
feedback circuit. The hypothesis is tested by using an specially patterned optokinetic drum that simulates the visual effect of having a very leaky oculomotor...
26 KB (3,328 words) - 05:38, 5 February 2025
opposed to peripheral (vestibular) pathology. Optokinetics generally are used as a cross-check on abnormal responses to oculomotor tests. Both of these tests...
5 KB (564 words) - 13:34, 28 May 2025
shut. Contralateral homonymous inferior quadrantanopia Asymmetry of optokinetic nystagmus (OKN) Sensory seizures Dominant hemisphere Conduction aphasia...
20 KB (2,232 words) - 00:03, 27 November 2024
scenery whipping by. He called this "railway nystagmus", also known as "optokinetic nystagmus". His findings were published in the journal Laeger, 83:1516...
46 KB (5,053 words) - 07:06, 28 April 2025
His work would also confirm that the eyelid of a newborn is raised in response to a vestibular as well as an auditory stimulus. In the late 19th century...
13 KB (1,765 words) - 10:12, 23 September 2024
patient's nose. As the eyes converge, the pupils should constrict. The optokinetic nystagmus test is optional and involves asking the patient to look at...
15 KB (2,054 words) - 10:09, 29 December 2023
Naito Y, Senda M, et al. (April 2009). "Cortical activation during optokinetic stimulation — an fMRI study". Acta Otolaryngol. 129 (4): 440–3. doi:10...
64 KB (7,652 words) - 10:33, 28 May 2025
relative accommodation Positive relative accommodation Vergence system Optokinetic system Amsler grid Gonioscopy Corneal topography Corneal pachymetry Scheimpflug...
33 KB (3,953 words) - 11:07, 28 May 2025
the effects are generally short-term. The review also suggests that Optokinetic Stimulation is effective in improving position sense, motor skills, body...
46 KB (5,861 words) - 20:49, 25 May 2025
Neck muscle vibration Non-invasive brain stimulation (NIBS) Repetitive optokinetic stimulation Visual scanning with exploration training Some recovery protocols...
24 KB (2,878 words) - 03:24, 27 May 2025
"Changes in the ventral dendrite of Mauthner neurons in goldfish after optokinetic stimulation". Neurosci. Behav. Physiol. 38 (9): 917–21. doi:10.1007/s11055-008-9071-9...
27 KB (3,546 words) - 21:56, 26 May 2025
saccades, smooth pursuit, vergence, vestibulo-ocular, and optokinetic movements. Pupillary response refers to the voluntary or involuntary change in the size...
40 KB (4,514 words) - 15:16, 25 May 2025
For infants, visual acuity can be tested by visual evoked response, Catford drum, optokinetic nystagmus, and Teller's acuity cards tests. For children...
11 KB (1,225 words) - 05:55, 8 November 2023