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Download G11: Posterior abdominal wall
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Posterior Abdominal Wall Dr. Morton ANAT 6010 Page 26 Muscles • Psoas major and minor • Iliacus • Quadratus lumborum • Diaphragm Unit 2, p26 x Diaphragm and Related Structures T10 T8 T12 Unit 2, p26 Ventral rami review • Cervical plexus • Brachial plexus • Thoracic nn. • Lumbar plexus • Sacral plexus Dermatomes and Peripheral Nerves T12: Subcostal L1: Iliohypogastric L1: Ilioinguinal Unit 2, p27 Cutaneous Fields Lateral fem. cut. n. (L2-L3) Anterior fem. cut. n. (L2-L4) Cutaneous Fields L1 Lateral fem. cut. n. (L2-L3) L2 L3 L4 L5 Anterior fem. cut. n. (L2-L4) Dermatomes vs. Cutaneous Fields L1 Lateral fem. cut. n. (L2-L3) L2 L3 L4 L5 Anterior fem. cut. n. (L2-L4) Dermatomes and Peripheral Nerves Unit 2, p27 Sympathetic Splanchnic Nerves Unit 2, p27 Sympathetic Nerve Path Unit 2, p27 Parasympathetic Splanchnic Nerves Unit 2, p28 Abdominal Aorta Unit 2, p29 Inferior Vena Cava • • • Courses to the right of the midline Largest vein in the body No valves (bidirectional flow, depending on pressure gradient) • Tributaries generally follow the similarly named arteries • Exceptions exist • Left gonadal v drains into the left renal v • Begins at L5, where the common iliac veins join Inferior Vena Cava Unit 2, p29 Lymphatics Unit 2, p30 Adrenals, Kidneys, Ureters Unit 2, p31 Adrenal (Suprarenal) Glands • Located on the superior pole of each kidney • Separated from the kidneys by fascia • Two parts • Cortex • Mesodermal in origin • Secretes corticosteroids and androgens • Medulla • Neural crest in origin • Secrete catecholamines • Epinephrine (adrenaline) • Norepinephrine (noradrenaline) Adrenal Glands, continued • Arterial supply • Superior adrenal arteries • 6-8 branches from each inferior phrenic a • Middle suprarenal arteries • 1 or more from the abdominal aorta • Inferior adrenal arteries • 1 or more from each renal artery Adrenal Glands, continued • Venous drainage • Suprarenal veins • Right is short and empties into the inferior vena cava • Left is longer and empties into the left renal vein Kidneys to the Bladder Kidneys Unit 2, p31 Autonomic Nerves to the Kidneys Unit 2, p32 Ureters Unit 2, p33 Urinary Bladder Unit 2, p33 Urinary Bladder Unit 2, p33 Urinary Bladder Innervation Unit 2, p34 Pg. 34 Pg. 34
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