hippus


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hippus

(ˈhɪpəs)
n
(Medicine) ophthalmol a disorder of the eye in which the pupil dilates and contracts in an irregular spasmodic rhythm
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These take the form of quasiperiodic slow oscillations, sometimes termed hippus [23, 28-30].
For each 120 sec trace we computed the energy in three contiguous frequency bands: hippus (0-0.8 Hz), delta (0.8-4 Hz), and theta (4-8 Hz).
Hippus was observed in all birds when the pupil achieved its most miotic state, with the duration and intensity of this response varying among individual birds.
Seizures cause a spectrum of pupillary abnormalities that include mydriasis (3), miosis (4) and hippus (5).
Simulataneous recording of pupillary hippus and EEG.
In addition to detecting small pupillary reactions, the use of the velocity profile by the pupillometer allows for differentiation between a true pupillary reaction and hippus (i.e., rhythmic fluctuations in pupillary diameter).
In the Hellenistic, Roman, and early Byzantine periods, this region featured two municipal territories: Caesarea Philippi (also known as Paneas and, later, Banias) in the north and Hippus (Susita), with its territory, to the south.
As a result, under constant lighting conditions, there is significant variation in pupil size from moment to moment (hippus) and from person to person.
(23) Patients with autonomic neuropathy also show a reduction in hippus (a small, rhythmic and fast fluctuation of the pupil) during continuous illumination compared to healthy patients.