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Muscles-Origin, Insertion, Action, Inervation

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Muscle
Origin
Insertion
Action
Inervation
External Abdominal Oblique   Ext. surface lower 8 ribs   Aponeurosis to linea alba, xiphoid process, ant. iliac crest and pubic tubercle   (blank)   Lower 6 thoracic and upper 2 lumbar  
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Internal Abdominal Oblique   Lateral 2/3 on inguinal ligament, ant. 2/3 of iliac crest, lumbar aponeurosis   Lower border of ribs 10-12 with aponeurosis to linea alba, pectineal line of pubis   (blank)   Lower 6 thoracic and uper 2 lumbar, iliohypogastric and ilioinguinal  
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Transverse Abdominus   Lat. 1/3 of inguinal lig, inner lip of iliac crest, thoracolumbar fascia, cratilages of ribs 7-12   Aponeurosis to linea alba, pectineal line of pubis   (blank)   Intercostal nerves 7-12, iliohypogastric and ilioinguinal  
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Rectus Abdominus   Pubic tubercle and superior pubic lig.   Cartilages of ribs 5-7, xiphoid process   Flex vertebral column, posterior tiping of coxals   Intercostal nerves 7-12, iliohypogastric and ilioinguinal  
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Quadratus Lumborum   Iliolumbar ligs, posterior iliac crest   Lower border of rib 12, tips of transverse processi of first 4 lumbar vertebrae   Lat. flexion of vertebral col., depress 12th rib, assist forced expiration   Subcostal nerves and lumbar s.n. 1-3  
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Psoas Major   Transverse processi, sides of bodies and intervertebral discs of T12-L5   Lesser trochanter of femur   Flexion, lat. rotation of femur. Flex vertebral column when thigh fixed (sit-up)   Lumbar s.n. 2 and 3  
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Iliacus   Upper iliac fossa, iliac crest, ant. sacroiliac lig., and base of sacrum   Lesser trochanter of femur   Flex femur   Femoral nerve (L2-L4 s.n.)  
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Pyramidalis   Pubis and superior pubis lig.   Linea alba   Tenses linea alba   Subcostal nerve, s.n. T12  
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Psoas Minor   Vertebral margins of T12 and L1   Pectineal line of pubis   Elevates pelvis, minor   Lumbar s.n. 1  
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External Intercostal   Inf. border of adjacent sup. rib   Superior border of adjacent inf. rib   Elevate/fixate intercostal space   Intercostal nerves  
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Internal Intercostal   Superior border of adjacent inf. rib   Inferior border of adjacent sup. rib   Depress/fixate intercostal space   Intercostal nerves  
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Diaphragm   Xiphoid process, costal cartilages of ribs 7-12, L1-L3   Central tendon of the diaphragm   Respiration   Phrenic nerve  
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Transverse Thoracis   Internal surfaces of body of sternum, xiphoid process, costal cartilages of ribs 4-6   Lower border and internal surface of ribs 2-6   Depress ribs 2-6   Upper 6 intercostal nerves  
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Subcostals   Internal surface of rib near angle   Superior border of rib 1-3 ribs below   Compression   Intercostal nerves  
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Serratus Posterior Superior   Ligamentum nuchae, last cervical spine and thoracic spines 1-3   Superior border of ribs 2-5 just past angle   Elevate/fixate ribs 2-5   ventral rami of thoracic s.n. 1-3  
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Serratus Posterior Inferior   Last 2 thoracic and first 2 lumbar spines   Inferior border of lower ribs 9-12   Depress/fixate ribs 9-12   ventral rami of last four thoracic s.n. 9-12  
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Levatores Costarum   Tips of transverse processi of C7-T11   External surface of rib below   Elevate T1-12   Ventral rami of thoracic spinal nerves in the area  
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Scalenus Anterior   Ant. tubercles of trans. processi of C3-C6   Superior surface of 1st rib   Elevate 1st rib, lat flexion of C3-C6, rotate C3-C6   Ventral rami, cervical s.n. 5-8  
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Scalenus Medius   Posterior tubercles C2-C7   Superior surface of 1st rib   Elevate 1st rib, lat flexion of C2-C7, rotate C2-C7   ventral rami, cervical s.n. 3-4  
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Scalenus Posterior   Posterior tubercles of transverse processi C4-C6   Superior surface of 2nd rib   Elevate 2nd rib, lat flexion C4-C6, rotate C4-C6   Ventral rami, cervical s.n. 3-8  
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Created by: TSUBulldog14
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