Velpeau's Anatomy of regions / translated from the French by Henry Hancock.

  • Velpeau, A. (Alfred), 1795-1867.
Date:
1838
Catalogue details

Licence: Public Domain Mark

Credit: Velpeau's Anatomy of regions / translated from the French by Henry Hancock. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    135/596 (page 125)
    Fat and cellular tissue separate it from the trapezius, whilst its anterior surface is divided from the chest and splenii, by the loose elastic cellular tissue forming the communication between the supra-scapular region, and the space comprised between the serratus magnus, the intercostal, and rhomboid muscles, allow- ing pus and other fluids to circulate through the two regions. The omo-hyoid, frequently converted into a tendon in its pas- sage beneath the sterno-mastoid, crosses, obliquely from below, upwards, the subclavian artery and vein, the three or four prin- cipal nerves running to form the bracheal plexus, the two scaleni muscles, the phrenic nerve, and cervicalis ascendens artery. It is sometimes, but not often, attached to the posterior convexity of the clavicle, in which case a fibrous lamella is commonly given off, to fill up the sinus resulting from the union of the clavicle with the acromion and coracoid process. Ascending in front of the scaleni, the omo-hyoid circumscribes an exceedingly important triangle, which may be named the omo- clavicular space; this is divided in two by the scalenus anticus muscle. In its internal portion we meet with the termination of the two jugular and the subclavian veins, the vertebral and inferior thyroid vessels, the acromial vein, phrenic nerve, supra- scapula, posterior and ascending cervical, internal mammary, and subclavian arteries, with the origin of the last cervical nerves. In its external portion are the subclavian vessels, the supra-scapula and transverse cervical veins, the posterior sca- pula artery, the three last cervical and first dorsal nerves, with a portion of the scalenus posticus muscle, and the first rib. It next, with the trapezius and sterno-mastoid muscles, bounds another triangle (omo-trapezoid), containing the cervical plexus of nerves, or the origin of the branches proceeding from it, the fourth and fifth pair running to the bracheal plexus; various branches of the transverse cervical vessels; and, from above, down- wards, the superior extremity of the splenius, levator anguli scapulae, and posterior scalenus muscles; more deeply seated, the lesser complexus, and a portion of the vertebral artery. The scaleni consist, sometimes, of three or four distinct por- tions, but more commonly of two only. One, the posterior, is attached to the second rib; the other, anterior, shorter and more rounded, descends internally, and in front, to be attached by a tendon to the tubercle of the first rib. These two muscles are separated by a triangle, comprising,— 1st, Inferiorly, and slightly anteriorly, the subclavian artery. 2d, Higher, and posteriorly, the first intercostal nerve, united to the seventh cervical and the sixth cervical nerve. 3d, Still higher, a small fleshy fasciculus, sometimes descend- ing, from behind the anterior scalenus, to the costal extremity of the posterior. 4th, Finally, in the apex of the triangle, and above this fasci- culus, the two first branches of nerves, running to the axilla.