Injections of cholera toxin B subunit conjugated to horseradish peroxidase (CTB‐HRP) were
made into the lingual branch of the hypoglossal nerve in four species of finch in order to
identify the innervation of the mechanoreceptors of the dermal papillae of the tongue, and
simultaneously to determine the pattern of central projections of lingual hypoglossal
afferents. The results showed that hypoglossal fibers innervate all the Herbst corpuscles and
terminal cell receptors of the elaborately organized papillae of the dorsum of the tongue, of …