750. The FACIAL NERVE (eighth pair) passes from the skull through an opening situated below the ear, (_mas´toid foramen_.) It is distributed over the face, supplying the muscles with nervous filaments. -=-=-=-=-=-=-=-=-=-=-=-= 748. What is said of the abducentes, or sixth pair of nerves? 749. Of the portio mollis? Explain fig. 127. 750. Of the facial nerve? -=-=-=-=-=-=-=-=-=-=-=-= 751. The GLOSSO-PHARYNGEAL NERVE (ninth pair) passes from the brain, through an opening with the jugular vein, (_foramen lac´e-rum_.) It is distributed to the mucous membrane of the tongue and throat, and also to the mucous glands of the mouth. 752. the PNEUMOGASTRIC NERVE (tenth pair) escapes from the brain through the foramen lacerum. It sends branches to the larynx, pharynx, oesophagus, lungs, spleen, pancreas, liver, stomach, and intestines. (Fig. 132.) 753. The SPINAL ACCESSORY NERVE (eleventh pair) has its origin in the respiratory tract of the spinal cord. It connects with the ninth and tenth pairs of nerves, and is distributed to the muscles about the neck. 754. The HYPO-GLOSSAL NERVE (twelfth pair) passes from the brain, through a small opening, (_con´dy-loid foramen_.) It ramifies upon the muscles of the tongue, and is its motor nerve. _Observation._ The cranial nerves, with the exception of the olfactory, optic, and auditory, connect with each other by means of filaments. They also send connecting nervous filaments to the upper spinal nerves, (cervical,) and the sympathetic nerve. -=-=-=-=-=-=-=-=-=-=-=-= 751. Describe the glosso-pharyngeal nerve. 752. The pneumogastric nerve. 753. The spinal accessory nerve. 754. The hypo-glossal nerve. -=-=-=-=-=-=-=-=-=-=-=-= CHAPTER XXXVII. ANATOMY OF THE NERVOUS SYSTEM, CONTINUED. 755. The spinal column contains the spinal cord, the roots of the spinal nerves, and the membranes of the cord. 756. The SPINAL CORD extends from the medulla oblongata to the second lumbar vertebra, where it terminates in a rounded point. It presents a difference of diameter in different parts of its extent, and exhibits three enlargements. The uppermost of these is the medulla oblongata. There is no distinct demarkation between this enlargement and the spinal cord. The next corresponds with the origin of the nerves distributed to the upper extremities; the third enlargement is situated near the termination of the cord, and corresponds with the attachment of the nerves which are intended for the supply of the lower extremities.