Complete Spine & Thorax Muscles Chart with Origins, Insertions, Innervation & Actions

​Trail Guide Chapter 4: Page 183​


​Muscle:​ ​Origin:​ ​Insertion:​ ​Action:​ ​Innervation:​

​Spinalis​ -​ ​Spinous​ -​ ​Spinous​ ​ nilaterally​​:​
U ​-​spinal nerve​
​processes​​of the​ ​processe​​s of​ ​Laterally flex​
​(Erector Spinae​ ​upper lumbar​ ​upper thoracic​ ​vertebral column​
​Group)​ ​and lower​ ​(​thoracis​​)​ ​to the same side​
​thoracic​
(​ Intermediate​ ​vertebrae​ -​ Spinous​ ​ ilaterally​​:​
B
​Intrinsic​ ​(​thoracis​​)​ ​processes of​ ​Extend the​
​muscles)​ ​cervicals, except​ ​vertebral column​
​C-1 (​​cervicis​​)​
-​ Ligamentum​
​nuchae, spinous​
​process of C-7​
​(​cervicis​​)​

-​ Common​ -​ Lower nine ribs​ ​ nilaterally​​:​
U ​-​spinal nerve​
​Longissimus​
​tendon​ ​and t​​ransverse​ ​Laterally flex​
​(​thoracis​​)​ ​processes​​of​ ​vertebral column​
(​ Erector Spinae​ ​thoracic​ ​to the same side​
​Group)​ -​ Transverse​ ​vertebrae​
​processes of​ ​(thoracis)​ ​ ilaterally​​:​
B
​upper five​ ​Extend the​
​(Intermediate​ ​thoracic​ -​ ​Transverse​ ​vertebral column​
​Intrinsic​ ​vertebrae​ ​processes​​of​
​muscles)​ ​(cervicis and​ ​cervical​
​capitis) –​​T1-T5​ ​vertebrae​
​(cervicis)​

-​ Mastoid process​
​of temporal bone​
​(capitis)​

​Illiocostalis​ -​ Common​ -​ Transverse​ ​ nilaterally​​:​
U -​ ​spinal nerve​
​tendon, sacrum,​ ​processes of​ ​Laterally flex​
​iliac crest​ ​lumbar vertebrae​ ​vertebral column​
​(Erector Spinae​ ​(​lumborum​​)​ ​1-3 and​ ​to the same side​ ​Posterior rami​
​Group)​ ​p​osterior​
​-Posterior​ ​surface of ribs​ ​ ilaterally​​:​
B
​surface of ribs​ ​6-12​ ​Extend the​
​(Intermediate​ ​1-12 (​​thoracis​ ​vertebral column​
​Intrinsic​ ​and cervicis)​ -​ angle or ribs​
​muscles)​ ​7-12​
​(lumborum)​

, -​ Posterior​
​surface of ribs​
​1-6 (thoracis)​

-​ Transverse​
​processes of​
​lower cervicals​
​(cervicis)​

​Multifidus​ ​-Sacrum​ -​ Spinous​ ​ nilaterally​​:​
U -​ ​spinal nerve​
​processes of​ ​Rotate​​the​
​-​transverse​ ​lumbar vertebrae​ ​vertebral column​ ​Posterior rami​
(​ Transversospin​ p ​ rocesses​​of​ ​through second​ ​to the​​opposite​
​alis Group)​ ​lumbar through​ ​cervical vertebra​ ​side​
​cervical​
​(Deep Intrinsic​ ​vertebrae​ (​ Multifidi span​ ​ ilaterally​​:​
B
​muscles)​ ​two to four​ ​Extend​​the​
​vertebrae;​ ​vertebral column​
-​ thickest in​ ​rotatores span​
​lumbar spine​ ​one to two​
​vertebrae)​


​Rotatores​ -​ ​Transverse​ -​ ​Spinous​ ​ nilaterally​​:​
U -​ spinal nerve​
​processes​​of​ ​processes​​of​ ​Rotate​​the​
​(Transversospin​ ​lumbar through​ ​lumbar vertebrae​ ​vertebral column​ ​Posterior rami​
a​ lis Group)​ ​cervical​ ​through second​ ​to the​​opposite​
​vertebrae​ ​cervical vertebra​ ​side​

(​ Deep Intrinsic​ (​ Multifidi span​ ​ ilaterally​​:​
B
​muscles)​ ​two to four​ ​Extend​​the​
​vertebrae;​ ​vertebral column​
​rotatores span​
​one to two​
​vertebrae)​


​ otatores​
R -​ Transverse​ -​ Lamina and​ -​ Assists in spinal​ ​-spinal nerve​
​Brevis​ ​processes of​ ​spinous process​ ​rotation and​
​vertebrae​ ​of the​​vertebrae​ ​stabilization​
​directly above​
​its origin​

​ otatores​
R -​ transverse​ -​ Lamina and​ -​ spinal rotation​ ​-spinal nerve​
​Longus​ ​processes of​ ​spinous process​ ​and stability​