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Abdomen m.

Nerve, blood supply, origin, insertion

MuscleOriginInsertionBlood SupplyInnervation
External Oblique m External surface and inferior border of lower 8 ribs; Anterior 1/2 of outer lip of ant. iliac crest; Anterior aponeurosis from 9th costal cartilage to below umbilicus (SPLS) Superior and inferior epigastric; posterior lumbar; lower post. intercostal and subcostal; superficial & deep circumflex iliac Terminal branches of ventral rami T7-T12 via lower intercostal and subcostal n
Internal Oblique m. Inferior borders & tips of lower 4 ribs; Thoracolumbar fascia; Ant 2/3 of intermediate line of ant. iliac crest; Lateral 2/3 upper surface of inguinal lig; crest and medial part of pectineal line; ant aponeurosis to cartilages of ribs 7-9 SPLS Terminal branches of ventral ramus of T7-T12; Ilioinguinal & iliohypogastric L1
Transversus Abdominis Internal aspects of lower 6 costal cartilages; thoracolumbar fascia between iliac crest & 12th rib; ant. 2/3 of inner lip of ant iliac crest; Lateral 2/3 of inguinal lig; pubic crest and pectineal line; aponeurosis to linea alba SPLS Same as internal Oblique
Quadratus Lumborum m. Iliolumbar ligament and adjacent portion of iliac crest Medila 1/2 of lower border of 12th rib; Apices of transverse processes of L1-L4 (ALBS) Arteria lumbalis ima; lumbar br of iliolumbar; br of lumbar; subcostal Ventral rami of T12-L4
Cremaster m Inferomedial border of internal olblique and TA; Middle of inguinal lig Pubic tubercle and lateral pubic crest Cremastic a from inferior epigastric a Genital br. of genitofemoral n. L1,L2
Pyramidalis m Front of pubis and ligamentous fibers in front of symphysis Linea alba between umbilicus and pubis Inferior epigastric a; Deep circumflex iliac a Terminal branches of ventral ramus of T12 via subcostal
Rectus abdominis m Costal cartilage 5-7; crest of pubis; Contralateral m. at linea alba Superior and inferior epigastric a; branch from posterior lumbar; lower posterior intercostal; subcostal Terminal branches of ventral rami of T6-T12 via lower intercostal and subcostal
Created by: PippaODU