DISSECTING MANUAL. 



of the tibia; it then runs under the anterior annular ligament 

 and Extensor proprius hallucis tendon and divides on the dor- 

 sum of the foot into two terminal branches, internal and ex- 

 ternal. Collateral branches; muscular to the Tibialis anticus, 

 Extensor proprius hallucis, Extensor longus digitorum, and 

 Peroneus tertius; articular, to the ankle-joint. [651] 



Terminal Branches. The internal runs to the first interos- 

 seous space and divides into two (dorsal digital) branches for 

 the skin on the contiguous sides of the great and second toes, 

 communicating with the musculo-cutaneous ; it sends one or 

 two (dorsal interosseous) branches to the tarso-metatarsal, and 

 metatarso-phalangeal joints and First dorsal interosseous. The 

 external runs outward under the Extensor brevis digitorum, 

 ending in a gangliform enlargement from which branches go to 

 the Extensor brevis digitorum and tarsal, tarso-metatarsal and 

 metatarso-phalangeal joints; it may give off four (dorsal in- 

 terosseous) branches, the two inner to the Second and Third 

 dorsal interossei and the tarso-metatarsal joints, and the two 

 outer to the tarso-metatarsal joints. [651] 



Musculo-cutaneous. Running below the head of the fibula 

 and under the upper fibres of the Peroneus longus, this descends 

 between the Peronei and the Extensor longus digitorum, in 

 front of the fibula, to the lower third of the leg ; it then pierces 

 the deep fascia and divides into two branches, internal and ex- 

 ternal. It also gives muscular branches to the Peronei, longus 

 and brevis. The internal branch descends over the anterior 

 annular ligament, supplying the lower third of the leg and dor- 

 sum of the foot, and divides into three branches ; one (internal) 

 to the skin on the dorsum of the foot and inner side of the great 

 toe, communicating with the internal saphenous ; one (middle) 

 to the interval between the great and second toes, dividing 

 into two branches which communicate with the anterior tibial ; 

 and one (external) to the interval between the second and third 

 toes, dividing in two (digital) branches for the adjacent sides of 

 these toes. [651] 



[300] 



