Fig. 4

Photomicrographs of the developing inner ear and associated/adjacent nervous structures. Empty arrowheads indicate semi-circular canals (a, b); Full arrowhead indicate the endo-lymphatic sac (a); Arrow indicates the saccular area (a, b); Asterisk indicates the vestibulocochlear nerve immunostained fibres (a, b). while the trigeminal (trig) and the cochlear (co) ganglia showed cytoplasmic labelling, the vestibular ganglion (vest) was negative to CB1R presence. c high magnification of the cochlear (co) ganglion; d high magnification of the trigeminal (trig) ganglion. Scale bars are equal to 100 µm in a, b and to 50 µm in c, d