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. Author manuscript; available in PMC: 2013 Nov 3.
Published in final edited form as: Dev Biol. 2012 Feb 12;365(1):10.1016/j.ydbio.2012.02.008. doi: 10.1016/j.ydbio.2012.02.008

Fig. 8.

Fig. 8

A developmental time line describing when BDNF and NT-4 influence geniculate ganglion development. Below the time line are descriptions of developmental changes occurring within the geniculate ganglion at each age. The time period during which geniculate neurons are NT-4 dependent is represented by the blue box and the time period during which geniculate neurons are BDNF dependent is represented by the red box. BDNF and NT-4 support of the geniculate ganglion overlaps between E13.5 and E16.5. Notice that NT-4 starts early before target innervation unlike BDNF which begins its influence around the time of target innervation. Also, both BDNF and NT-4 have a similar duration of influence on development of the taste system.