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Trunk & Spine
muscle attachments
| Question | Answer |
|---|---|
| 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 |
| Transverse Abdominis (Upper Fibers) | O: Cartilage of lower 6 ribs; I: Linea Alba superior to umbilicus |
| Pyramidalis | O: Front of pubis and anterier pubic ligament; I: Linea alba midway b/w pubic bone & umbilicus |
| Rectus Abdominis (1st Section) | O: Inner origin of 2nd section of RA; I: Pubic crest & symphysis, also lateral expansion to opposite side |
| Rectus Abdominis (2nd Section) | O: From 1st section of RA; I: Into 3rd section of RA |
| Rectus Abdominis (3rd Section) | O: From 2nd section of RA; I: Into 4th section of RA |
| Rectus Abdominis (4th Section: Lateral) | O: From 3rd section of RA; I: Into costocartilage of 6th & 7th rib |
| Rectus Abdominis (4th Section: Medial) | O: From 3rd section of RA; I: Into cartilage of 5th rib and side of xyphoid process |
| External Oblique (Anterior Fibers) | O: Interdigitates surface of ribs 5-8; I: Into Linea Alba through aponeurosis |
| External Oblique (Lateral Fibers) | O: Ribs 9-12 interdigitate with serratus and lats; I: Anterior lip of iliac crest to ASIS into inguinal ligament |
| 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 |
| 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 |
| Quadratus Lumborum (Costal Fibers) | O: Iliolumbar ligament, Posterior Iliac Crest; I: Inferior border of 12th rib |
| Quadratus Lumborum (Spinal Fibers) | O: Posterior 1/2 of Iliac Crest; I: Transverse Processes of L1-4 |
| Multifidus (Lumbosacral) | O: Back of Sacrum, Medial and Posterior Iliac Spine, Mamillary processes of Lumbar Vertebrae; I: Spinous Processes of T11-L5 |
| Multifidus (Thoraco-Lumbar) | O: Transverse processes of Thoracic Vertebrae; I: Spinous Processes of C6-T11 |
| 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 |
| Iliocostalis Thoracis | O: Upper border of Ribs 12-7 @ angles; I: Inferior border of Ribs 1-6 @ angles |
| 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) |
| Longissimus Thoracis | O: Transverse Processes of all thoracic vertebrae (T1-12); I: To the adjacent Ribs: 1-9 |
| Spinalis Lumborum | O: Arise from Spinous processes of sacral vertebrae; I: Insert into Lumbar Spinous processes 1-3 |
| Spinalis Thoracis | O: Arise from Spinous Processes of L3-T10; I: Insert into Spinous processes of T2-8 |
| 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) |
| Rotatores Lumborum | O: Sacrum and Transverse processes of Lumbar (L1-5) to Cervical Vertebrae; I: Spinous process 1-2 levels up (L5-T12) |
| Rotatores Thoracis | O: Sacrum and Transverse Processes of Lumbar to Cervical Vertebrae (T1-12); I: Spinous processes 1 level up (SP of C7-T11) |
| Serratus Posterior (Inferior Fibers) | O: Spinous processes of T11-L2; I: Inferior border of Ribs 9-12, just medial to angles |
| Serratus Posterior (Superior Fibers) | O: Spinous Process of C6-T2; I: Posterior surface of Ribs 2-5 |
| Sternalis | O: Manubrium and Inferior-Medial clavicle; I: Superior Medial Fascia of 4th Rectus |
| Anterior Intercostals | O: Inferior border of superior rib; I: Superior border of inferior rib |
| Posterior Intercostals | O: Inferior border of superior rib ; I: Superior border of inferior rib |
Created by:
edodds74@yahoo.com
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