. A dictionary of birds . ervating all the numerousexterior muscles beside the skin and feathers of the the latter group (b) are three strong nerves (1) the n. supra-coracoideus, covered by a membranaceous ligament, crossing thecoracoid and supplying the m. supracoracoideus,^ (2) the n. pectoralisfor the large pectoral muscle, and (3) the n. brachialis inferior, whichaccompanies the last so far as the axilla, and then passing along thehumerus divides into a n. medianus, supplying the m. biceps andthe radial side of the forearm and hand, and a n. ulnaris, sendingseveral branches
. A dictionary of birds . ervating all the numerousexterior muscles beside the skin and feathers of the the latter group (b) are three strong nerves (1) the n. supra-coracoideus, covered by a membranaceous ligament, crossing thecoracoid and supplying the m. supracoracoideus,^ (2) the n. pectoralisfor the large pectoral muscle, and (3) the n. brachialis inferior, whichaccompanies the last so far as the axilla, and then passing along thehumerus divides into a n. medianus, supplying the m. biceps andthe radial side of the forearm and hand, and a n. ulnaris, sendingseveral branches to the ulnar side. The spinal nerves succeeding to the Brachial Plexus are thoseof the intercostal region, their short dorsal branches supply the ^ In many birds the median side of tlie coracoid has a notch (bridged by atendinous ligament) for the passage of the nerve, which in other cases may passthrough a foramen near the inner side of that bone ; but these differences havelittle taxonomic importance. 624 NERVOUS SYSTEM. Fis. 1. Ventral IX. -Diagrammatic Representation of the peripheral Nervous System of a Birdview. Left sule showing the Somatic, right side showing the Visceral Nerves Lu,Srstn ;?^,A ^- ^t; • ^- • ^- distribution to the Carotid, the , Stomach and Gut; , Lingual branch and , Syringeal branch of N. hypo-glossus ; Sy. Sympathetic ganglion of the first spinal nerve. Fig. view of a transverse section through the spinal cord oa. the level of the exit ol a typical spinal nerve.^.//. and IM Anterior or ventral and Posterior or dorsal Horns with ganglia, of the -rey sub- TZ VotV:f ^ ° T ^ ^^ ^^ ^^^^^ ^^^^ = ^>-«- *-■ «P-1 Ganglion of thedorsal root of the spinal nerve; the Sympathetic Ganglion; RA., , , Ventral and Visceral (or sympathetic) branches of the spinal ner^•e. NERVOUS SYSTEM 625 dorsal muscles of the spine, and their long ventral branches runbetween the ribs, supplying the intercostal a
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Keywords: ., bookauthorlyde, bookcentury1800, bookdecade1890, booksubjectbirds
