1992
DOI: 10.1002/neu.480230808
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Normal and abnormal pathfinding of facial nerve fibers in the chick embryo

Abstract: Development of the facial nerve was studied in normal chicken embryos and after surgical disruption of ingrowing sensory facial nerve fibers at 38-72 h of incubation. Disruption of facial nerve fibers by otocyst removal often induced a rostral deviation of the facial nerve and ganglion to the level of the trigeminal ganglion. Cell bodies of the geniculate ganglion trailed their deviating neurites and occupied an abnormal rostral position adjacent to the trigeminal ganglion. Deviating facial nerve fibers were l… Show more

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Cited by 3 publications
(2 citation statements)
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“…Eighty-eight percent (127 of 145 animals) of the cases died within one week, and 7% (11 of 145 animals) after one week, postsurgery. This high attrition rate in long-term survival chick embryos after early otocyst (Parks 1979;von Bartheld et al 1992), or rhombomere (Wahl and Noden 2001) ablation at E2.5-3 (Hamburger and Hamilton stages 14-17) has been reported. Table 2 indicates the effect of degree of unilateral geniculate ganglion lesion on geniculate ganglion and anterior mandibular taste bud counts.…”
Section: General Observationsmentioning
confidence: 91%
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“…Eighty-eight percent (127 of 145 animals) of the cases died within one week, and 7% (11 of 145 animals) after one week, postsurgery. This high attrition rate in long-term survival chick embryos after early otocyst (Parks 1979;von Bartheld et al 1992), or rhombomere (Wahl and Noden 2001) ablation at E2.5-3 (Hamburger and Hamilton stages 14-17) has been reported. Table 2 indicates the effect of degree of unilateral geniculate ganglion lesion on geniculate ganglion and anterior mandibular taste bud counts.…”
Section: General Observationsmentioning
confidence: 91%
“…This is particularly relevant in those otocystlesioned cases that sustained 90 (Case 912) and 85% (Case 916) ( Table 2) geniculate ganglion damage. Whether these placodally-derived neuroblasts would have successfully migrated to the location of the (geniculo-)cochleo-vestibular ganglionic mass or partially lesioned otocyst is not easily known (von Bartheld et al 1992). For example, after ablation of single rhombomeres 2, 3 or 4 in chick embryo at E2.5-3 (Hamburger-Hamilton stages 14-17), placodally-derived trigeminal neuroblasts may fail to migrate proximally to merge with neural crest derived neuroblasts in the developing sensory trigeminal ganglion, or may form ectopic distal ganglia (Wahl and Noden 2001).…”
Section: Surgically-lesioned (Otocyst Ablations) Geniculate Ganglion mentioning
confidence: 99%