Observations and notes on the arteries of the limbs / by Thomas William Nunn.

  • Nunn, T. W. (Thomas William), 1825-1909.
Date:
1864
Catalogue details

Licence: Public Domain Mark

Credit: Observations and notes on the arteries of the limbs / by Thomas William Nunn. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    The division of the main trunk of an artery into two (or more) others, branching and non-branching, is found, therefore, to occur in other arteries besides the iliac and femoral. ;([w An examination of the ultimate distribution of these branching and non-branching trunks respectively (the anatomical features of which are so contrary), demon- strates that each of the branching trunks is distributed to that segment of the limb iu which it is found, while the non-branching trunk transmits the blood to the distal segment or segmentsff0p,r( Valt doidw of Jaera Thus we have two classes of vessels, one comprising the trunks distributed to the segments iu which they are found—which, in fact, pertain to the segments ; and another comprising trunks transmissive to distal segments. The former may be denominated segmental; the latter, transegmental. If we look a little more minutely, we shall be struck with the fact that certain vessels springing from dif- ferent points run towards, and open into, one another, or anastomose; and also if we again turn to the arteries i of the leg, and examine the auterior tibial (Fig. 1, d), we shall see that this vessel is maintained as a definite o trunk from the upper to the lower end of the leg; that 1 it gives off no large single branch, much less does it bifurcate; but it gives very numerous small branches, and bodily joins, so to speak, the plantar arch by dipping between the great toe and the toe next to it. There are, thus, two other kinds of vessels to be considered, namely, the anastomotic, which cannot be in- cluded in either class already named, and the composite, multifarious in function, possessing in a greater or less degree the characteristics of all. For classification three primary classes and a compo- site class appear, then, to be required as follows:— I. Segmental. 111. AnastomoticorCommunicating. - II. Transegmental. IV. Composite.