Fistula of the withers and poll-evil . werelocated. An important point to remember about thefunicular portion of the ligamentum nuchas isits wide expansion posteriorly. Approachingthe crest of the withers it extends in the out-ward and downward direction five to six inches,partly enveloping the rhomboideus and tra-pezius. This expanded portion is often thecause of recurrence of fistula after the mainportion has been removed. It is surmounted along its course by thepad of the mane a structure composed ofelastic fibers interspersed with adipose is most abundant in the middle of the cer
Fistula of the withers and poll-evil . werelocated. An important point to remember about thefunicular portion of the ligamentum nuchas isits wide expansion posteriorly. Approachingthe crest of the withers it extends in the out-ward and downward direction five to six inches,partly enveloping the rhomboideus and tra-pezius. This expanded portion is often thecause of recurrence of fistula after the mainportion has been removed. It is surmounted along its course by thepad of the mane a structure composed ofelastic fibers interspersed with adipose is most abundant in the middle of the cervi-cal region and is best developed in stallions ofthe draft breeds. The funicular portion is a sheet-like par-tition dividing the superior cervical musclesinto halves. It is composed of two layersattached loosely to one another by areolar tis-sue, and each layer is composed of two parts,anterior and posterior. The anterior part isthick and strong, attached to the funicularportion above and to the cervical spinous proc- THE WITHERS 25. .^< ;f% ^, X W .h .r H Pig. 1—Ligamentum Nuche of particularly the relation of the funicular portion ofthe ligamentum nuche to the atlas and to the spines of thethoracic vertebrae. Also the arrangement of the lamellarportion. (After Sisson.) 26 FISTULA AND POLL-EVIL esses below. The posterior part is attached tothe second and third dorsal spines and extendsin the form of several digitations forward anddownward where its brush-like fibers reach thespines of the fifth and sixth cervical fibers of the ligament are more spare thanin the anterior part and sometimes do not evenreach the sixth vertebra. Between the anteriorand the posterior parts is a space of consider-able dimensions which especialh^ in horses ofgood flesh contains a mass of fatty tissue. Thisopening is at the level of the extremity of thesecond dorsal spinous process and is the seatof typical fistula of the withers. It is the spacewhere the sacculation of
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