Diseases of the Seventh Cranial Nerve

Klein, Caroline M.

doi:10.1016/b978-0-7216-9491-7.50053-3

Cited by 4 publications

(3 citation statements)

References 215 publications

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“…Face é definida como a parte anterior da cabeça, que se estende superiormente até a linha do cabelo; inferiormente, até o queixo e a base da mandíbula e, lateralmente, até as orelhas (2). O sétimo par craniano é responsável pela integridade neurofuncional de estruturas importantes nessa região (1) .…”

Section: Aspectos Clínicos Da Paralisia Facial Periféricaunclassified

“…As relações anatômicas e topográficas do Nervo Facial (NF) fazem do sétimo par o mais susceptível a lesões dentre os dozes pares cranianos. O trajeto, longo e sinuoso dentro do crânio e bastante superficial após sua saída, faz com que, em lesões agudas e na presença de edema, fique vulnerável à compressão pelo osso (1,3,8). Após a saída do osso, a superficialidade do nervo o deixa bastante sensível aos traumas provocados por acidentes automobilísticos, armas de fogo, objetos cortantes ou quedas, fazendo dessa a segunda causa mais comum de PFP (36) terapêuticas efetivas e os esforços no sentido de eliminar ou reduzir déficits residuais necessitam ser contínuos.…”

Section: Aspectos Clínicos Da Paralisia Facial Periféricaunclassified

“…A Paralisia Facial Periférica (PFP) é uma alteração no mecanismo de movimentação dos músculos faciais, ocasionada por danos no Sistema Nervoso Periférico (1). O sétimo par craniano responde pela integridade neurofisiológica de estruturas responsáveis por funções motoras complexas e refinadas na face (2,3).…”

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O impacto da paralisia facial periférica na imagem corporal dos sujeitos

Rios¹,

Nagae²

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Section: Aspectos Clínicos Da Paralisia Facial Periféricaunclassified

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O impacto da paralisia facial periférica na imagem corporal dos sujeitos

Rios¹,

Nagae²

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Nerve crush but not displacement-induced stretch of the intra-arachnoidal facial nerve promotes facial palsy after cerebellopontine angle surgery

et al. 2016

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Little is known about the reasons for occurrence of facial nerve palsy after removal of cerebellopontine angle tumors. Since the intra-arachnoidal portion of the facial nerve is considered to be so vulnerable that even the slightest tension or pinch may result in ruptured axons, we tested whether a graded stretch or controlled crush would affect the postoperative motor performance of the facial (vibrissal) muscle in rats. Thirty Wistar rats, divided into five groups (one with intact controls and four with facial nerve lesions), were used. Under inhalation anesthesia, the occipital squama was opened, the cerebellum gently retracted to the left, and the intra-arachnoidal segment of the right facial nerve exposed. A mechanical displacement of the brainstem with 1 or 3 mm toward the midline or an electromagnet-controlled crush of the facial nerve with a tweezers at a closure velocity of 50 and 100 mm/s was applied. On the next day, whisking motor performance was determined by video-based motion analysis. Even the larger (with 3 mm) mechanical displacement of the brainstem had no harmful effect: The amplitude of the vibrissal whisks was in the normal range of 50°-60°. On the other hand, even the light nerve crush (50 mm/s) injured the facial nerve and resulted in paralyzed vibrissal muscles (amplitude of 10°-15°). We conclude that, contrary to the generally acknowledged assumptions, it is the nerve crush but not the displacement-induced stretching of the intra-arachnoidal facial trunk that promotes facial palsy after cerebellopontine angle surgery in rats.

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Clinical Disorders of the Facial Nerve

Mattox¹

2010

Cummings Otolaryngology - Head and Neck Surgery

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Diseases of the Seventh Cranial Nerve

Cited by 4 publications

References 215 publications

O impacto da paralisia facial periférica na imagem corporal dos sujeitos

O impacto da paralisia facial periférica na imagem corporal dos sujeitos

Nerve crush but not displacement-induced stretch of the intra-arachnoidal facial nerve promotes facial palsy after cerebellopontine angle surgery

Clinical Disorders of the Facial Nerve

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