Trunk and other muscles: origin, insertion, action and innervation

8 muscles of this region (Trunk and other muscles) with their origin, insertion, action, nerve and artery. Press a name to see it on the 3D model.

Muscle	Origin	Insertion	Action	Innervation	Arterial supply
coccygeus Musculus coccygeus	iliopubic eminence			anococcygeal nerve
diaphragm Diaphragma		costal margin rib xiphoid process lumbar vertebra thoracic vertebra	inspiration movement	phrenic nerve	pericardiacophrenic artery
external anal sphincter Musculus sphincter ani externus				set of inferior anal nerves
external oblique Musculus obliquus externus abdominis		iliac crest pubic tubercle linea alba	flexion of the torso rotation of the torso lateral flexion of the torso raising intra-abdominal pressure exhalation	seventh intercostal nerve eighth intercostal nerve ninth intercostal nerve tenth intercostal nerve eleventh intercostal nerve subcostal nerve
latissimus dorsi muscle Musculus latissimus dorsi			extension of the arm via the shoulder joint adduction of the arm at the shoulder joint medial rotation of the arm at the shoulder joint exhalation	thoracodorsal nerve	thoracodorsal artery
multifidus muscles Musculi multifidi	iliac crest iliac tubrcle	spinous process	extension of the torso rotation of the torso lateral flexion of the torso rotation of the neck
rectus abdominis muscle Musculus rectus abdominis			flexion of the torso lateral flexion of the torso raising intra-abdominal pressure	sixth intercostal nerve seventh intercostal nerve eighth intercostal nerve ninth intercostal nerve tenth intercostal nerve eleventh intercostal nerve subcostal nerve iliohypogastric nerve ilio-inguinal nerve	inferior epigastric artery
transversospinal muscles Musculi transversospinales				medial branch of posterior ramus of spinal nerve