Abdomen and Cavity Grays

Abdomen and Cavity Grays - TheAbdomen...

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The Abdomen Surface Anatomy, Vessels, Muscles,  and Peritoneum
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    Abdominopelvic Cavity Ventral body cavity – Thoracic – Abdominopelvic Abdominopelvic – Abdominal Liver Stomach Kidneys – Pelvic cavity Bladder Some reproductive organs Rectum 
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    Abdominopelvic  Cavity • Surrounded by the  abdominal walls and  pelvic girdle • The two cavities are  continuous • Most organs surrounded  by a  peritoneal  cavity – Visceral peritoneum – Serous peritoneum – Peritoneal cavity pg 242
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    Abdominal Quadrants • 9 regions  • 4 quadrants – Draw “line” through  navel – Right upper quadrant – Left upper quadrant – Left lower quadrant – Right lower quadrant pg 242
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    Surface Anatomy Anterior abdominal wall  extends from costal margin to  inferior boundaries: – Iliac crest – Anterior superior iliac spine – Inguinal ligament – Pubic crest Superior boundary – Diaphragm  Central landmark – Umbilicus  Linea alba (white line) – Tendinous line – Extends from xiphoid process  to pubic symphysis pg 345
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    Muscles Function: – Help contain abdominal organs – Move trunk – Forced breathing – Increase intra-abdominal  pressure Abdominal wall – Anterior (4) Innervated by intercostal  nerves Continuous with layers of  intercostal muscles Fibers of layers run in  different directions for  strength Ends in aponeurosis which  contains rectus abdominis  muscle – Posterior (3) pg 250
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    Anterior Abdominal Wall Muscles Rectus Abdominis   Origin Pubic crest, symphysis Insertion  Xiphoid process, costal cartilages of ribs  5-7 Function  Flex, rotate trunk, fix and depress ribs,  stabilize pelvis, compress abdomen Internal oblique   Origin Lumbar fascia, iliac crest, inguinal  ligament Insertion  Linea alba, pubic crest, last 3-4 ribs,  costal margin Function Same for external obliques pg 250, 251
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    Anterior Abdominal Wall External oblique Origin Lower 8 ribs Insertion Aponeurosis to linea alba, pubic and iliac  crest Function  Flex trunk, compress abdominal wall  (together), Rotate trunk (separate sides) Transversus abdominis Origin Inguinal ligament, lumbar fascia, cartilage  of last  6 ribs, iliac crest Insertion Linea alba, pubic crest Function Compress abdominal contents pg 249
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  Posterior Abdominal Wall Iliopsoas Psoas major Origin Lumbar vertebrae, T 12 Insertion Lesser trochanter of femur via iliopsoas tendon Function  Thigh flexion, trunk flexion, lateral flexion Innervation Ventral rami L1-L3 Iliacus Origin Iliac fossa, ala of sacrum
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This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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Abdomen and Cavity Grays - TheAbdomen...

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