2005
DOI: 10.1097/01.mlg.0000150700.46377.96
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Nocturnal Onset and Development of Bell's Palsy

Abstract: Because several hours are required for facial palsy to develop before becoming apparent, this suggests that the onset and development of facial palsy occurred during sleep, when circulatory dynamics are reduced. In humans, ischemia is more likely to occur and produce facial palsy than virus reactivation.

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Cited by 13 publications
(9 citation statements)
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“…Another suggested mechanism is compromise of the vascular supply causing ischaemia to the nerve, though this is unlikely to the redundant and robust nature of the facial vasculature. This could be mediated directly, or through an indirect mechanism whereby the breakdown products affect the sympathetic plexus of the external carotid artery, leading to a vasospasm of the facial nerve resulting in ischemic neuritis and edema [3,6,7].…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Another suggested mechanism is compromise of the vascular supply causing ischaemia to the nerve, though this is unlikely to the redundant and robust nature of the facial vasculature. This could be mediated directly, or through an indirect mechanism whereby the breakdown products affect the sympathetic plexus of the external carotid artery, leading to a vasospasm of the facial nerve resulting in ischemic neuritis and edema [3,6,7].…”
Section: Discussionmentioning
confidence: 99%
“…Direct damage from a needle is even less plausible than perhaps one of the aforementioned indirect mechanisms given the distance away from the facial nerve. Similarly, traction injury, more common during surgeries in the area of where the facial nerve exits the stylomastoid foramen and branches into the face such as parotidectomy, temporomandibular joint surgery, and approaches to the facial skeleton such as the retromandibular approach, is highly unlikely [6][7][8][9]10].…”
Section: Discussionmentioning
confidence: 99%
“…Tal como neste estudo, Kanoh et al [8] verificaram que a maioria das pessoas com paralisia de Bell detectam os primeiros sinais da doença pela manhã, ao acordar, apresentando no seu estudo uma relação de 191:30:36 (manhã:tarde:noite). Isto pode ser explicado pelo fato do nervo facial sofrer um processo de isquemia que, mais frequentemente, aumenta e progride lentamente durante a noite, dando origem a edema e compressão do nervo e consequente perda da sua função.…”
Section: Discussionunclassified
“…A paralisia pode ser precedida por otalgia intensa e associar-se a distúrbios do paladar (disgeusia), salivação e lacrimejamento, além de hiperacusia. Os primeiros sinais clínicos são mais frequentemente detectados ao acordar [2]. A paralisia de Bell constitui a causa mais frequente de paralisia facial, com uma incidência estimada entre 20 e 30 casos por 100 mil habitantes, com prevalência ligeiramente superior no sexo feminino.…”
Section: Introductionunclassified
“…29 The observation that the onset and development of facial palsy occur during sleep and is noticed mostly in the morning points toward the ischemia as the cause due to reduction in circulatory dynamics at night. 30 This could be a secondary ischemia due to postinflammatory edema of the nerve.…”
Section: Ischemic (Compressive) Factorsmentioning
confidence: 99%