MUSCLES 51 



The dsep crural arch is a thickened bundle of fibres of the 

 transversalis fascia, attached to Poupart's ligament outside 

 the femoral vessels, and passing across the femoral sheath to 

 the ilio-pectineal line behind Gimbernat's ligament. 



ILIAC REGION. 



Psoas magnus : transverse processes and sides of bodies 

 of all the lumbar and body of iath dorsal vertebrae(p) (the 

 fleshy fibres are only attached to upper and lower margins 

 of bodies, and intervertebral substances, being connected by 

 a tendinous arch between) small trochanter of femur, receiv- 

 ing some fibres from the iliacus(T) (Branches from lumbar 

 plexus). [A flexes thigh on trunk, and rotates femur out- 

 wards; B flexes trunk on thigh.] 



Psoas parvus : bodies of i2th dorsal and ist lumbar 

 vertebrae and intervertebral disc(F) ilio-pectineal line(T) 

 (Branch from lumbar plexus). [Flexes lumbar spine.] Fre- 

 quently absent. 



Iliacus : upper half of iliac fossa, ilio-lumbar ligament, ala 

 of sacrum, and capsule of hip-joint(F) tendon of psoas, 

 triangular surface anterior to and below the small trochanter 

 (F) (Anterior crural). [A flexes hip-joint and rotates femur 

 outwards ; B flexes trunk on thigh.] Passes beneath Poupart's 

 ligament with the psoas. 



ANTERIOR FEMORAL REGION. 



Tensor fasciae femoris : outer edge of iliac crest for one 

 inch, anterior superior iliac spine, and half notch below it(A) 

 fascia lata(ilio-tibial band) about down thigh, anterior to 

 great trochanter(p) (Superior gluteal). [Makes fascia lata 

 tense, rotates inwards, and abducts femur.] 



Sartorius : anterior superior iliac spine and half notch below 

 (A) inner side of tibia, by side of tubercle, reaching by its 

 upper edge as far back as internal lateral ligament(AT) (Middle 

 cutaneous or special branch from anterior division of anterior 

 crural). [Flexes hip and knee, abducts and rotates thigh out.] 

 Longest muscle of body, crosses thigh obliquely, forming outer 

 boundary of Scarpa's triangle; lies over the roof of Hunter's canal; 

 lower tendon pierced by patellar branch of long saphenous nerve. 



Quadriceps extensor composed of: 



Vastus externus : upper half of shaft of femur, thus : from 

 base of neck, anterior and outer parts of base of great' tro- 

 chanter. and line from great trochanter to linea aspera, upper 

 half of external lip of linea aspera, external intermuscular 



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