. The comparative anatomy of the domesticated animals. Veterinary anatomy. 732 Fig. 340. TEE NERVES. little diflferently. The right passes round the axil- lary artery very obliquely, upwards, outwards, and backwards beneath the mediastinal pleura, to follow the external face of the trachea to above the origin of the bronchi, where this nerve terminates. The left also passes below the brachial trunk ; but instead of turning round the trachea, it merely lies beside that tube, and reaches the root of the lung, after crossing, outwardly, the origin of the two aortse. When these nerves arrive above
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 732 Fig. 340. TEE NERVES. little diflferently. The right passes round the axil- lary artery very obliquely, upwards, outwards, and backwards beneath the mediastinal pleura, to follow the external face of the trachea to above the origin of the bronchi, where this nerve terminates. The left also passes below the brachial trunk ; but instead of turning round the trachea, it merely lies beside that tube, and reaches the root of the lung, after crossing, outwardly, the origin of the two aortse. When these nerves arrive above the bifurca- tion of the trachea, they terminate by forming the bronchial plexus and oesophageal nerves—-the latter being prolonged to the stomach and the solar plexus. Beneath the jugular ganglion, but in the upper part of the neck, the pneumogastric receives fila- ments from the spinal accessory, ganglion of Andersch, sympathetic, hypoglossal, and the two first cervical. These different nerves cross each other in a very complex manner on the surface of the guttural pouch, the pharynx, and divisions of the carotids, and form the guttural, pharyngeal, and carotid plexuses. Distribution.—The branches furnished by the pneumogastric on its course are : 1. Communicating filaments with the cervical ganglion. 2. Pharyngeal branch. 3. Superior laryngeal nerve. 4. Communicating filaments with the inferior cervical ganglion. 5. Inferior laryngeal nerve. We will pass in review these collateral divisions before studying the terminal branches, which are: 1. Those forming the honchial plexus. 2. Those constituting the oesophageal nerves. ORIGIN AND DISTRIBUTION OP ^5 3> 4, Medulla oblongata ; 1, Corpus pyramidale of one THE EIGHTH PAIR OF ^ide; 2, Pons Varolii; 3, Corpus olivare; 4, Corpus NERVES IN MAN. restiforme; 5, Facial nerve; 6, Origin of glosso- pharyngeal nerve ; 7, Ganglion of Andersch ; 8, Trunk of the nerve; 9, Spinal accessory ; 10, Ganglion of pneumogastric; 11, Its pl
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