44 THE POCKET ANATOMY 



ABDOMINAL REGION. 



Obliquus abdominis externus: eight digitations from in- 

 ferior borders and outer surface of eight lower ribs, upper 

 five digitating with serratus magnus, lower three with latis- 

 simus dorsi(p) Anterior half of external lip of iliac crest, and 

 aponeurosis in front of belly, which is attached to pubic 

 spine and symphysis below(A), blends above with the fascia 

 over the pectoralis major, and joins in the middle line with 

 the opposite aponeurosis, forming the linea alba ; the rest of 

 the fibres forming Poupart's and Gimbernat's ligaments (A) 

 (Lower intercostals.Ilio-hypogastric, and Ilio-inguinal). [Sup 

 ports and compresses viscera, draws down lower ribs, and 

 laterally flexes thorax.] 



The external abdominal ring is an opening formed by a diver- 

 gence of some of the lower fibres of the aponeurosis of the 

 external oblique muscle ; it is situated just above the crest of 

 the pubes, and transmits spermatic cord in male and round 

 ligament in female. Boundaries Below. Pubic crest. Above. 

 Arched fibres. Laterally. External and internal pillars ; the 

 external pillar is attached below to pubic spine, the internal 

 pillar to pubic symphysis. The intercolumnar fascia passes 

 between the pillars, and is prolonged downwards over the cord. 



Poupart's Ligament. The part of the aponeurosis of the ex- 

 ternal oblique extending between anterior superior iliac spine 

 and pubic spine. The inner attachment is prolonged along 

 the pectineal line, forming Gimbernat's ligament, of which 

 some fibres are again reflected upwards and inwards to linea 

 alba, forming triangular fascia. 



Obliquus interims : outer of Poupart's ligament, anterior 

 middle lip of iliac crest, fascia lumborum between iliac 

 crest and I2th rib(p) inferior edges of cartilages of lower three 

 ribs on posterior surface, aponeurosis blending with its fellow 

 at linea alba; some of the lower fibres of the aponeurosis 

 arch over spermatic cord, join tendon of transversalis just 

 above pectineal line, forming the conjoined tendon, which is 

 attached to pectineal line, and crest of pubes(T) (Lower inter- 

 costals, Ilio-hypogastric). [As externus.] Aponeurosis forms 

 sheath to encase the rectus except at lower fourth posteriorly. 



Cremaster (peculiar to male) : middle of Poupart's ligament 

 and internal oblique(p) crest of os pubis(x) (Genito-crural). 

 [Supports and raises testis.] Fibres embedded in fascia (cremas- 

 teric) derived from internal oblique, covering cord and testis. 



Transversalis : outer Poupart's ligament, anterior f inner 

 lip iliac crest, inner surfaces of cartilages of lower six ribs(p) 



