Taste Fibers Research Articles

Species differences in the water taste.

Summary.1. The white rat lacks taste fibres discharging on the application of water to the tongue but it has “salt” fibres, which give not only a prompt but also a lasting response to the application of NaCl solutions as weak as 0.002 M.2. The rabbit displays a delayed response to water while the cat and the pig respond very promptly to the application of water upon the tongue.3. In all these animals (cat, pig and rabbit) the salt“ receptors are almost completely adapted to the saliva and adapt very quickly to the application of Ringer's solution. After a water rinse they all produce a phasic response to even as diluted NaCl solutions as 0.002 M.4. The high discrimination of salty solutions in the rat must rest upon its very highly sensitive “salt” fibres while the discrimination in thc animals that have “water” fibres is suggested to depend upon a dual system of “salt” and “water” fibres which are reciprocally stimulated.

DISTURBANCES OF TASTE OF OTITIC ORIGIN WITH SPECIAL REFERENCE TO OPERATIONS ON THE EAR

The perception of taste in the anterior two thirds of the tongue occurs through the chorda tympani nerve, whereas the posterior third is innervated from the glossopharyngeal nerve. Gustatory sense over the posterior third of the tongue has always been attributed to the glossopharyngeal nerve. The role of the chorda tympani in the transmission of the sensations of taste from the anterior two thirds of the tongue is also well established, but there is marked divergence of opinion in the medical literature as to the pathway for the taste fibers from the geniculate ganglion in the facial nerve to their central nucleus in the pons. It has been shown by many observers that the loss of taste on the anterior two thirds of the tongue has followed complete palsy of the fifth nerve, as in cases of extirpation of the gasserian ganglion. Cushing 1 in 1903, from his careful study and

Taste fibers and the fifth nerve

Taste fibers and the fifth nerve

THE NASAL GANGLION: OBSERVATIONS CONCERNING VERTIGO, PARAGEUSIA AND GLOSSODYNIA. CASE REPORT

My attention was first called to this syndrome by an observation made on a patient suffering from hay fever and asthma of nasal origin, to whom I gave a nasal ganglion injection by the posterior palatine (palatomaxillary) canal route, which I described in the February, 1925, issue of the<i>Laryngoscope</i>. For a few weeks following the injection, the patient complained of a disturbance of taste on the injected side. In tracing the possible cause, I found that the sensory root of the facial nerve, the nervus intermedius of Wrisberg, which supplies the greater superficial petrosal nerve to the nasal ganglion, possesses taste fibers. These taste fibers probably pass from the nasal ganglion, along with the anterior middle and posterior palatine nerves through the palatomaxillary canal, to the roof of the mouth and faucies, and from there to the tongue. CASE REPORT Shortly after this observation, Mr. J. K., a

Taste fibers and the chorda tympani nerve

Taste fibers and the chorda tympani nerve

On the course of the Taste Fibres

On the course of the Taste Fibres