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Musculoanatomical

Muscle nameMuscle functionAttachment (origin)Attachment (insertion)Innervation
Pectoralis Minor Elevates upper ribs Ribs 3-5 Coracoid process Pectoral
Serratus Anterior Move scapula forward, rotate scapula Ribs 1-8 Medial Border Scapula Long thoracic
External Intercostals Elevate rib cage, aid inspiration Infer border rib above Superior border rib below Intercostal
Internal Intercostals Depress rib cage, aid expiration Supr border rib below Inferior border rib above Intercostal
Diaphragm Prime mover of inspiration, flattens when contracts, lengthens thoracic cavity Phrenic
Rectus Abdominis Flex and rotate vertebral column Pubic crest and symphysis Xiphoid process and ribs 5-7 (cartilage) Intercostal
External Oblique Flex and rotate vertebral column, trunk rotation and lateral flexion Ribs 5-12 Pubic crest and iliac crest, linea alba Intercostal
Internal Oblique Same as external oblique Iliac crest Ribs 9-12 (cartilage), linea alba Intercostal
Transversus Abdominis Compress abdominal contents Ribs 6-12 (cartilage) Pubic crest, linea alba Intercostal and Ilioinguinal
Trapezius Extend neck; raise, rotate, and adduct scapula Occipital bone and spinous process of thoracic vertebrae Acromion and spine of scapula Accessory
Latissimus Dorsi Arm extension, adduct and rotate arm Spinous process of T6-L5 Lateral clavicle, acromion, spine of scapula Thoracodorsal
Erector Spinae: Iliocostalis, Longissimus, Spinalis As a pair: Extend neck and vertebral column Transverse process of C7-T12 Occipital bone and spinous process of cervical vertebrae (dorsal primary rami of spinal nerves C1-S5)
Created by: AZD
 

 



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