Human anatomy, including structure and development and practical considerations . lexus, which supplies the upper extremity and the lateralthoracic wall. THE CERVICAL PLEXUS. The cervical plexus (plexus cervicalis ) is formed by the union of the anteriorprimary divisions {rr. anteriores) of the upper four cervical nerves (Fig. 1086;.After traversing the I IG. intervertebral foramina,they pass behind thevertebral artery andemerge, the first be-tween the rectus capitislateralis and the rectuscapitis anticus minormuscles, and the othersfirst between the inter-transversales musclesand then between
Human anatomy, including structure and development and practical considerations . lexus, which supplies the upper extremity and the lateralthoracic wall. THE CERVICAL PLEXUS. The cervical plexus (plexus cervicalis ) is formed by the union of the anteriorprimary divisions {rr. anteriores) of the upper four cervical nerves (Fig. 1086;.After traversing the I IG. intervertebral foramina,they pass behind thevertebral artery andemerge, the first be-tween the rectus capitislateralis and the rectuscapitis anticus minormuscles, and the othersfirst between the inter-transversales musclesand then between therectus capitis anticusmajor and scalenus me-dius muscles. Each isjoined by a gray ramuscommunicans, derivedeither from the superiorcervical ganglion of thesympathetic or fromthe association cord be-tween the superior andmiddle cervical cover of thesterno-mastoid the fournerves are connected toform the cervical second, third andfourth each divide intoan ascending and adescending branch ; thefirst does not di\ branches are connected in Diagram illustrating; plan of cervical plexus. an irregular series of loops that constitute the cer\ical plexus, which lies opposite the first four cervical vertebrae and upon the sca-lenus medius and levator anguli scapulae muscles, and is covered by the sterno-mastoid. Branches.—The branches of the plexus may be divided into a superficial and adeep set. The former reach the under surface of the deep fascia at about the middleof the posterior margin of the sterno-mastoid and are distributed to the integumentof the head, neck, shoulder and upper pectoral region. The latter are divided intoan internal and an external group, some of which supply the muscles of the neck 1286 HTMAX and the diaj-jhray^ni, whilst others CDmiiuiiiicate with ihr nintli, lU-vc-iitli and twelfthcranial ami the sympathetic nerves. Thk Ckkvicai. :\rs. I. Superficial Branches. II. Deep Branches. A. Ascendinij branches
Size: 1467px × 1704px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
