274 



NERVOUS SYSTEM. 



THE NERVOUS SYSTEM.-Continued. 



DISTRIBUTION OF THE BRANCHES 



OF THE SACRAL PLEXUS. 

 [CONTINUATION OF TABLE ON PAGE 288.] 



(i). SUPERIOR GLUTEAL, 



(Sup. Br. to the Gluteus medius and minimus. 



J At/- B~ / 1 the Gluteus medius and minimus. 

 i inj . nr. < 



l to the Tensor vaginae femoris. 



(2). MUSCULAR BRANCHES to -f p y riformis Obturator internus, the two Gemelli, and 

 I the Quadratus femoris muscles. 



(3). ARTICULAR BRANCHES, to the hip-joint. 



( Gluteus maximus muscle. 



(4). SMALL SCIATIC. 



Inf. Gluteal, 



l Skin of side of penis, or vulva. 



Inf.Pudendal {Skin of upper and inner thigh, and of scrotum 

 ' I or labium. 



Cutaneous, 



(5). GREAT SCIATIC. 



/Ascending, to Skin over Glutei. 

 \ Descending, to Skin of post, thigh. 



Articular, ... to the hip-joint. 



Muscular, to ( Addu ctus magnus, Biceps. 



t- Semi-membranosus, Semi-tendinosus. 



EXTERNAL POPLITEAL or PERONEAL. 

 INTERNAL POPLITEAL NERVE. 



f Terminal Branches. 

 (. (See next page.) 



(6). PUDIC. 



Perineal, 



/to Skin of anus, scrotum, 

 Superficial Perineal, -< penis and labia, and the 



^ Sphincter ani muscle. 

 t Muscular, to perineal muscles. 



Inferior Hemorrhoidal, ( to Sphincter ani muscle. 

 ' to Skin of anal region, 



Dorsal of Penis, / Skin of dorsum of penis. 

 l Br. to Corpora cavernosa. 



The Sacral Plexus lies in the pelvis upon the Pyriformis muscle, and is covered by 

 the Pelvic fascia, and the Sciatic and Pudic Arteries. 



