Muscles of the serratus group

Question 1

Answer 1

Serratus Anterior

Origin - superior eight or nine ribs

Insertion - vertebral border and inferior angle of scapula

Action - abducs scapula and rotates upward. Elevates ribs when scapula isstabilized

Innervation - Long thoracic nerve

Question 2

Answer 2

Rhomboideus

Origin - spinous process of C7-T5

Insertion: Medial border of scapula

Action: elevates and adducts scapula

innervation: brachial plexus

Question 3

Answer 3

Levator Scapulae

Origin: transverse process of C1-C4

Insertion: medial border of scapula

Action: elevates scapula; extends neck when the scapula is fixed

Innervation: ventral rami C3, C4