Reinnervation After Resection of the Facial Nerve

Cerný, L; Steidl, L

doi:10.3109/00016487409124604

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…2 The authors attributed a case of unexpected facial reinnervation to dual innervation of the buccinator muscle. They refuted the possibility of seventh nerve regeneration, claiming that "it is unlikely that outgrowth sprouts of the main [facial] nerve trunk could persist.. .and penetrate up to the paralyzed facial muscle."…”

Section: Discussionmentioning

confidence: 98%

Trigeminal Neo-Neurotization of the Paralyzed Face

Cheney¹,

McKenna²,

West³

et al. 1997

Ann Otol Rhinol Laryngol

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Sporadic reports throughout the literature have documented the spontaneous return of facial function following deliberate intraoperative sacrifice of the facial nerve. Trigeminal reinnervation of the facial muscles has been suggested as one possible mechanism for this occurrence. Evidence for the phenomenon of trigeminal neo-neurotization has been documented experimentally. The case of a 62-year-old woman who underwent total left parotidectomy with transection of a large facial nerve segment is presented in order to provide further clinical evidence supporting trigeminal neo-neurotization of the facial nerve. Despite the lack of any efforts to reinnervate the patient or graft the facial nerve defect, the patient spontaneously developed return of facial function. Postoperative clinical and electrical testing in this case supports trigeminal-facial reinnervation as the cause for return of facial function. The case report is summarized with a brief discussion, and the relevant literature is thoroughly reviewed.

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Section: Discussionmentioning

confidence: 98%

Trigeminal Neo-Neurotization of the Paralyzed Face

Cheney¹,

McKenna²,

West³

et al. 1997

Ann Otol Rhinol Laryngol

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“…Lateral root biomass and, hence, root to shoot biomass ratios were found to be enhanced under these conditions (Mousseau and Saugier, 1992). In forest trees, lateral roots constitute the major site of mycorrhiza formation (Cerny, 1974). As a consequence, the removal of photosynthate by mycorrhizal fungi will enhance the already high carbon sink strength of this part of the root.…”

Section: Introductionmentioning

confidence: 96%

“…The same author already observed that mycorrhization improves viability and accelerates growth of the trees. Apparently, mycorrhizal fungi protect the trees against soilborn root pathogens, provide several phytohormones, and assists the tree in nutrient and water uptake (Cerny, 1974;Harley and Smith, 1983). On the other hand, the fungi depend on the supply with photosynthate produced by the tree (Cerny, 1974;Harley and Smith, 1983).…”

Section: Introductionmentioning

confidence: 99%

“…Apparently, mycorrhizal fungi protect the trees against soilborn root pathogens, provide several phytohormones, and assists the tree in nutrient and water uptake (Cerny, 1974;Harley and Smith, 1983). On the other hand, the fungi depend on the supply with photosynthate produced by the tree (Cerny, 1974;Harley and Smith, 1983). Under light-saturating conditions in ambient air the production of photosynthate is restricted in C3-plants, including most tree species, by the availability of CO2 (Bowes, 1993;Stitt, 1991).…”

Section: Introductionmentioning

confidence: 99%

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Interactive effects of mycorrhization and elevated carbon dioxide on growth of young pedunculate oak (Quercus robur L.) trees

Seegmüller

Rennenberg

1994

Plant Soil

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Pedunculate oak (Quercus robur L.) was germinated and grown at ambient CO2 level and 650 ppmv CO2 in the presence and absence of the ectomycorrhizal fungus Laccaria laccata for a total of 6 month under nutrient non-limiting conditions. Mycorrhization and elevated atmospheric COg each supported the growth of the trees. Stem height, stem diameter, and dry matter accumulation of pedunculate oak were increased by mycorrhization. Elevated atmospheric CO2 enhanced stem height, stem diameter, fresh weight and dry weight, as well as lateral root formation of the trees. In combination, mycorrhization and elevated atmospheric CO2 had a more than additive, positive effect on tree height and biomass accumulation, and further improved lateral root formation of the trees. From these findings it is suggested that the efficiency of the roots in supporting the growth of the shoot is increased in mycorrhized oak trees at elevated atmospheric CO2.Abbreviations: DW -dry weight, FW -fresh weight, RWC -relative water content.

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Altered Distribution of Motor Neurons in Experimental Facial Nerve Paralysis

Nakao

Matsumoto

Kumagami

1992

Acta Oto-Laryngologica

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The alteration of motor neurons in the brainstem after recovery from experimental facial nerve paralysis was examined by the retrograde horseradish peroxidase (HRP) technique in the rabbit. Six months after nerve crush injury at the center of the vertical portion, HRP was injected into the zygomatic muscle on the recovered side. The distribution of labelled neurons in the brainstem was compared with that in the normal rabbit. In control animals, motor neurons in the facial nucleus were somatotopically organized, and there were no labelled neurons in other nuclei in the brainstem. In recovered animals, on the contrary, the somatotopic organization of the facial nucleus was obscure and multipolar neurons of varying size were labelled bilaterally in the reticular formation from the pons to the medulla.

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Reinnervation After Resection of the Facial Nerve

Cited by 4 publications

References 10 publications

Trigeminal Neo-Neurotization of the Paralyzed Face

Trigeminal Neo-Neurotization of the Paralyzed Face

Interactive effects of mycorrhization and elevated carbon dioxide on growth of young pedunculate oak (Quercus robur L.) trees

Altered Distribution of Motor Neurons in Experimental Facial Nerve Paralysis

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