BIOB33H3 Study Guide - Quiz Guide: Thoracolumbar Fascia, Latissimus Dorsi Muscle, Abdominal External Oblique Muscle
5 Feb 2013
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Origin: dorsal, ventral, lateral sides of the body, fibers from lumbodorsal fascia and lumbar and thoracic vertebrae. Inserts: proximal end of the humerus on its medial surface. Origin: found at center of the ventral abdomen. Structure is a thickening of the central part of the ventral aponeurosis (a sheet like fusion of the tendons) Lumbodorsal fascia is another example of an aponeurosis. Origin: from posterior ribs and lumbodorsal fascia. Fibers run caudo ventrally in an oblique direction. Fibers of the internal oblique run caudo-dorsally which is perpendicular to those of the external oblique. Reflect internal oblique and transvers ab is underneath. Some of its fibers run transversely across abdominal wall. Others run almost parallel to the external oblique. Runs from pubis to sternum and upper ribs. Covered by a very tough fascia layer. Originates: from back of neck, back of head and mastoid process. Ventral prominent part of the larynx (adam"s apple)
