Physiology and biochemistry in modern medicine . dicated. In the normal (lower) tracing inhibition occurs hut after nicotine (second tracing)no inhibition follows. Stimulation of the crescent in the next two lines still is followed by inhibi-tion. The final effects of the drug are shown in the last two (upper) tracings. (From Jackson.) the white crescentic line, inhibition still occurs, because at this point thepostganglionic nerve fibers come near to the surface and therefore arestimulated (Fig. 69). On the other hand, atropine is a drug whichparalyzes the postganglionic fibers, so that after
Physiology and biochemistry in modern medicine . dicated. In the normal (lower) tracing inhibition occurs hut after nicotine (second tracing)no inhibition follows. Stimulation of the crescent in the next two lines still is followed by inhibi-tion. The final effects of the drug are shown in the last two (upper) tracings. (From Jackson.) the white crescentic line, inhibition still occurs, because at this point thepostganglionic nerve fibers come near to the surface and therefore arestimulated (Fig. 69). On the other hand, atropine is a drug whichparalyzes the postganglionic fibers, so that after its application to theheart inhibition can not beproduced by stimulating either the vagustrunk or the white crescentic line. Pilocarpine and muscarine are drugswhich have -an action exactly opposite or antagonistic to that of atro- Medulla oblongata Cervical 1 Accessory trapezius Spinalmedulla{cord) Rami communican-tes going toSymp. gang,(preganglionic)Ansa subclavia(Annulus ofVieussensh* Thoracic-3nerves Electrodes(Acceleration, or. Postganglionic fibers are dotted thus Jugular ganglion (Gang, of the root)Depressor (Fall in pressure or slowing of heart.)(Sensory) Separate nerve in rabbit and opossum. Nodosum ganglion (Gang, of the trunk) ^r/ngton)^?Inhibitory cranial autonomic fibers Superior cervical ganglionDescending sympathetic fibers in cord^Cervical vago-sympathetic trunk ^Electrodes (slowing or stoppage ofSubclavian heart. Augmentation in some animals.)Aortic drch
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