muscle attachments
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each of the black spaces below before clicking
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| Transverse Abdominis (Lower Fibers) | O: Thoracolumbar Fascia, Ant 3/4 of Iliac Crest, Lat 1/3 of Inguinal ligament;
I: Linea Alba below umbilicus and into pubic symphysis
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| Transverse Abdominis (Upper Fibers) | O: Cartilage of lower 6 ribs;
I: Linea Alba superior to umbilicus
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| Pyramidalis | O: Front of pubis and anterier pubic ligament;
I: Linea alba midway b/w pubic bone & umbilicus
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| Rectus Abdominis (1st Section) | O: Inner origin of 2nd section of RA;
I: Pubic crest & symphysis, also lateral expansion to opposite side
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| Rectus Abdominis (2nd Section) | O: From 1st section of RA;
I: Into 3rd section of RA
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| Rectus Abdominis (3rd Section) | O: From 2nd section of RA;
I: Into 4th section of RA
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| Rectus Abdominis (4th Section: Lateral) | O: From 3rd section of RA;
I: Into costocartilage of 6th & 7th rib
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| Rectus Abdominis (4th Section: Medial) | O: From 3rd section of RA;
I: Into cartilage of 5th rib and side of xyphoid process
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| External Oblique (Anterior Fibers) | O: Interdigitates surface of ribs 5-8;
I: Into Linea Alba through aponeurosis
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| External Oblique (Lateral Fibers) | O: Ribs 9-12 interdigitate with serratus and lats;
I: Anterior lip of iliac crest to ASIS into inguinal ligament
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| Internal Oblique (Anterior Fibers) | O: Lateral 2/3 of inguinal ligament and Anterior iliac crest;
I: With TVA into crest of pubis and into Linea Alba thru an aponeurosis
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| Internal Oblique (Lateral Fibers) | O: Middle 1/3 of Iliac Crest and Thoracolumbar fascia;
I: Inferior border of 10-12 ribs and Linea Alba thru aponeurosis
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| Quadratus Lumborum (Costal Fibers) | O: Iliolumbar ligament, Posterior Iliac Crest;
I: Inferior border of 12th rib
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| Quadratus Lumborum (Spinal Fibers) | O: Posterior 1/2 of Iliac Crest;
I: Transverse Processes of L1-4
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| Multifidus (Lumbosacral) | O: Back of Sacrum, Medial and Posterior Iliac Spine, Mamillary processes of Lumbar Vertebrae;
I: Spinous Processes of T11-L5
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| Multifidus (Thoraco-Lumbar) | O: Transverse processes of Thoracic Vertebrae;
I: Spinous Processes of C6-T11
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| Iliocostalis Lumborum | O: Surface of broad tendon attached to the sacrum and external lip of iliac crest and the thoracolumbar fascia; I: Inferior borders of lower 7 ribs (7-12) @ the angle
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| Iliocostalis Thoracis | O: Upper border of Ribs 12-7 @ angles;
I: Inferior border of Ribs 1-6 @ angles
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| Longissimus Lumborum | O: Spinous processes of all lumbar and sacral vertebrae thru fascial attachment;
I: Inferior borders of Ribs 9-12 (just lateral to Transverse Processes)
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| Longissimus Thoracis | O: Transverse Processes of all thoracic vertebrae (T1-12);
I: To the adjacent Ribs: 1-9
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| Spinalis Lumborum | O: Arise from Spinous processes of sacral vertebrae;
I: Insert into Lumbar Spinous processes 1-3
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| Spinalis Thoracis | O: Arise from Spinous Processes of L3-T10;
I: Insert into Spinous processes of T2-8
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| Semispinalis Thoracis | O: Arise from Transverse processes of T1-12;
I: All thoracic (T1-12) and lower 4 cervical (C4-7) spinous processes (combined with cervicis)
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| Rotatores Lumborum | O: Sacrum and Transverse processes of Lumbar (L1-5) to Cervical Vertebrae;
I: Spinous process 1-2 levels up (L5-T12)
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| Rotatores Thoracis | O: Sacrum and Transverse Processes of Lumbar to Cervical Vertebrae (T1-12);
I: Spinous processes 1 level up (SP of C7-T11)
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| Serratus Posterior (Inferior Fibers) | O: Spinous processes of T11-L2;
I: Inferior border of Ribs 9-12, just medial to angles
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| Serratus Posterior (Superior Fibers) | O: Spinous Process of C6-T2;
I: Posterior surface of Ribs 2-5
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| Sternalis | O: Manubrium and Inferior-Medial clavicle;
I: Superior Medial Fascia of 4th Rectus
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| Anterior Intercostals | O: Inferior border of superior rib;
I: Superior border of inferior rib
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| Posterior Intercostals | O: Inferior border of superior rib ;
I: Superior border of inferior rib
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