182 SPECIAL ANATOMY. 



semitendinosus ; above and before, in front of the Patella, like- 

 wise with the fuse, femoris, below with the ligaments of the bend 

 of the ankle. Its external, cutaneous surface forms a sheath for 

 vena and nerv. saphsen. extern. ; the internal attaches itself to 

 the crista tibix and fibulse, and forms three principal sheaths for 

 the anterior, external and posterior muscles, and several second- 

 ary sheaths (e. g., between the superficial and deep layer on the 

 posterior surface). On the malleoli it forms the following liga- 

 ments : 



380. 1. Lig. transversum, an inch and a half broad, passes 

 from the anterior angle of the tibia to that of the fibula, and 

 covers the inferior portion of the muscles. 



381. 2. Lig. cruciatum tarsi, consists of striae one half to one 

 inch broad, crossing over the tarsal joint, a. The superior passes 

 from the internal malleolus to the superior and outer surfaces of 

 proc. anter. calcanei, developes two tendinous sheaths, an internal 

 (for tibial. antic.), an external (for extens. digit, comm. long. 

 and peron.), and a central, incomplete, for extens. halluc. long. 

 and Vasa and Nn. tibiales antici.) Retzius describes underneath 

 a sling-shaped ligament, lig. fundiforme tarsi, which lies in a 

 crescentic form over the tendon of extens. commun. long, and 

 peronseus tertius. b. The inferior, from the external malleolus 

 to the internal border of the foot, continues into the aponeurosis 

 plantar, (interna), and forms, likewise, upon the back of the 

 foot, sheaths for the before-described muscles. 



382. 3. Lig. laciniatum tarsi intern., from the inner malleo- 

 lus to the inner side of Calcaneus, forms four sheaths : a. for 

 art., ven., and n. tibial. post, (the most superficial) ; b. for m. 

 tibial postic. (the anterior) ; c. m. flex, digit, comm. long, (the 

 posterior). Both behind the malleolus intern. ; d. for m. flex, 

 hallucis long, (the most inferior). 



383. 4. Lig. laciniatum tarsi externum, from the external 

 malleolus to the calcaneus, forms at the commencement a common 

 sheath, afterwards divided into two, for m. peronseus longus and 

 brevis. 



D. Muscles on the Foot. 



a. Upon the dorsum of the foot. 



384. 1. Extensor digitorum brevis s. pediaeus. 



Pos. : oblique from without, inwards, and from behind, for- 

 wards, under the tendons of the long extensor of the toes, over 

 the anterior row of the tarsal and metatarsal bones. On the inner 

 border: Art. pedisea. [extens. hallucis brevis is the strongest]. 

 Or.: Proc. anterior calcanei (external surface). Ins.: Phalanx I. 

 of the first to the fourth toe, on the external border of the long 



