Skeletal Attachments Innervation Action Anatomical Area Name Internal intercosta

Question

Skeletal Attachments Innervation Action Anatomical Area Name Internal intercostals Diaphragm Pectoralis minor Rectus abdominis External obliques Muscles of the abdominal wall Internal obliques Transverse abdominis Postural muscles of Erector spinae the Back Serratus anterior Trapezius Latissimus dorsi Muscles that move the scapula Muscles that move Teres major the arm Pectoralis major Deltoid Supraspinatus Infraspinatus Teres minor Rotator Cuff Muscles (SITS) Muscles not specifically labeled or viewable on the Muscle labeling document.

Explanation / Answer

Internal intercoastal-depresses and retracts ribs during breathing.attached to ribs innervated by intercostal nerve

Diaphragm-is a muscle of respiration.attached to ribs,sternum,spine.innervated by phrenic nerve

Pectoralis minor-stabilizes scapula and rises ribs during inspiration .origin-3 to 5 ribs; insertion-scapula;medial pectoral nerve

Rectus abdominis-flexuon of lumbar spine;origin-pubic crest;insertion-5to 7 ribs;thoraco abdominal nerve

External oblique-contalateral rotation of torso;origin-5 to 12 ribs; insertion-iliac crest,pubic tubercle;thoracoabdominal and subcostal nerve

Internal oblique-compresses abdomen; origin-inguinal ligament,iliac crest;insertion-pecten pubis;sub coastal nerve,ilio hypogastric nerve,ilio inguinal nerve

Transverse abdominus-compresses abdominal contents; origin-iliac crest;insertion-xiphoid process,pubic crest; thoracoabdominal nerve,ilio inguinal and ilio hypogastric nerve

Erector spinae-extends vertebral column; origin-T9- T12;insertion-scapula process of T1&T2; posterior branch of spinal nerve

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