Morphological Study of Neurons in the Trigeminal Ganglion

The pseudounipolarneurons in the trigeminal ganglia carry sensation from the face to the brainstem. These neurons vary in its sizes that carry specific sensations. In this study trigeminal ganglion neurons are classified based on its diameters in to three types namely large, medium, small sized with the help of histomorphometry. The small sized neurons of trigeminal ganglion modulate pain sensation in migraine. To classify the trigeminal ganglion neurons in to large, medium and small sized and to study the diameter of the neurons in the trigeminal ganglion. Neurons in the trigeminal ganglion which is also sensory ganglion homologues to dorsal ischolar_main ganglion were classified based on its diameter in to small (approx. > 22). Most nociceptors are responding to touch and pressure, thermal and chemical stimuli. Large neurons thatis mainly nociceptive.