. The cat : an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. 278 TEE CAT. [CHAP. IX. plexus, placed opposite the first four vertebrae below the sterno- mastoid muscle, and connected, near the skull, with the pneumo- gastric, hypoglossal, and sympathetic nerves. The fifth and sixth cervical nerves give off a branch called the phrenic nerve, which passes backAvards between the pleura and the pericardium, and is distributed to the diaphragm. § 18. The three posterior cervical nerves unite to form an inter- lacement called the brachial plexus, whic
. The cat : an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. 278 TEE CAT. [CHAP. IX. plexus, placed opposite the first four vertebrae below the sterno- mastoid muscle, and connected, near the skull, with the pneumo- gastric, hypoglossal, and sympathetic nerves. The fifth and sixth cervical nerves give off a branch called the phrenic nerve, which passes backAvards between the pleura and the pericardium, and is distributed to the diaphragm. § 18. The three posterior cervical nerves unite to form an inter- lacement called the brachial plexus, which is of much greater size than the cervical plexus, and gives origin to the nerves of the fore-limb. It is reinforced by the first dorsal nerve, and the plexus extends down from the lower part of the neck to the axillary space. The connexions formed by the nerves in the plexus are some- what apt to vary, but the fol- lowing conditions appear to be normal. A large branch from the eighth cervical nerve unites with the main branch of the first dorsal to form a trunk which (after giving off a small branch to help to form the me- dian) continues on as the ulnar nerve (Fig. 131, v). Delicate branches from the first dorsal and eighth cervical also unite to form the internal cutaneous nerve (ic). The median nerve is formed by the junction of the small offshoot from the ulnar (already mentioned), with a branch from the seventh cer- vical nerve. The largest branch of the seventh, however, unites with a considerable branch from the eighth cervical to form the musculo-spiral nerve. From close to the root of the seventh cervical the external respiratory nerve of Bell passes backwards. The musculo- cutaneous nerve is formed by the junction of slender branches from the sixth and seventh cervical nerves, and from the junction of two stouter branches from the same two nerves there arise the circumflex and the subscapular nerves. Another subscapular nerve is formed by the junction of very slend
Size: 1373px × 1821px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectanatomy, bookyear1881
