Hippus: Difference between revisions
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It is particularly noticeable when [[pupil]] function is tested with a light,<ref name="Cassin"/> but is independent of eye movements or changes in illumination.<ref name="McLaren"/> It is usually normal, however pathological hippus can occur.<ref name="Cassin"/><ref name="Beatty"/> |
It is particularly noticeable when [[pupil]] function is tested with a light,<ref name="Cassin"/> but is independent of eye movements or changes in illumination.<ref name="McLaren"/> It is usually normal, however pathological hippus can occur.<ref name="Cassin"/><ref name="Beatty"/> |
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| ⚫ | Pathologic hippus, the phenomenon of increased oscillation or their amplitude, is associated with [[aconitine|aconite]] poisoning,<ref name="Reddy">Forensic and State Medicine: Reddy</ref> [[altered mental status]], trauma, cirrhosis, and [[renal disease]]; suggesting a common pathway of [[frontal lobe]] dysfunction.<ref name="Denny">{{cite journal |vauthors=Denny JC, Arndt FV, Dupont WD, Neilson EG | year = 2008 | title = Increased hospital mortality in patients with bedside hippus | journal = Am J Med | volume = 121 | issue = 3| pages = 239–45 | pmid = 18328309 | doi=10.1016/j.amjmed.2007.09.014}}</ref> A retrospective study of 117 hospitalized patients with hippus noted an increased 30-day mortality when compared to controls and adjusted for other factors.<ref name="Denny" /> |
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Pathologic hippus, the phenomenon o |
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| ⚫ | of increased oscillation or their amplitude, is associated with [[aconitine|aconite]] poisoning,<ref name="Reddy">Forensic and State Medicine: Reddy</ref> [[altered mental status]], trauma, cirrhosis, and [[renal disease]]; suggesting a common pathway of [[frontal lobe]] dysfunction.<ref name="Denny">{{cite journal |vauthors=Denny JC, Arndt FV, Dupont WD, Neilson EG | year = 2008 | title = Increased hospital mortality in patients with bedside hippus | journal = Am J Med | volume = 121 | issue = 3| pages = 239–45 | pmid = 18328309 | doi=10.1016/j.amjmed.2007.09.014}}</ref> A retrospective study of 117 hospitalized patients with hippus noted an increased 30-day mortality when compared to controls and adjusted for other factors.<ref name="Denny" /> |
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==See also== |
==See also== |
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Revision as of 04:51, 22 November 2021
Pupillary hippus, also known as pupillary athetosis, is spasmodic, rhythmic, but regular dilating and contracting pupillary movements between the sphincter and dilator muscles.[1][2] Pupillary hippus comes from the Greek hippos meaning horse, perhaps due to the rhythm of the contractions representing a galloping horse.[3]
It is particularly noticeable when pupil function is tested with a light,[2] but is independent of eye movements or changes in illumination.[1] It is usually normal, however pathological hippus can occur.[2][3]
Pathologic hippus, the phenomenon of increased oscillation or their amplitude, is associated with aconite poisoning,[4] altered mental status, trauma, cirrhosis, and renal disease; suggesting a common pathway of frontal lobe dysfunction.[5] A retrospective study of 117 hospitalized patients with hippus noted an increased 30-day mortality when compared to controls and adjusted for other factors.[5]
See also
- Athetosis
- Anisocoria - condition characterized by an unequal size of the eyes' pupils.
References
- ^ a b McLaren J. W.; Erie J. C.; Brubaker R. F. (1992). "Computerized analysis of pupillograms in studies of alertness". Investigative Ophthalmology and Visual Science. 33: 671–6.
- ^ a b c Cassin, B. and Solomon, S. Dictionary of Eye Terminology. Gainesville, Florida: Triad Publishing Company, 1990.
- ^ a b Beatty, J., & Lucero-Wagoner, B. (2000). The pupillary system. In J. T. Cacioppo, L. G. Tassinary & G. G. Bernston (Eds.), The handbook of psychophysiology (2nd ed.) (pp. 142-162). USA: Cambridge University Press.
- ^ Forensic and State Medicine: Reddy
- ^ a b Denny JC, Arndt FV, Dupont WD, Neilson EG (2008). "Increased hospital mortality in patients with bedside hippus". Am J Med. 121 (3): 239–45. doi:10.1016/j.amjmed.2007.09.014. PMID 18328309.
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