Q27 Serratus Anterior

Question 1

Briefly describe the position of this muscle

Answer 1

Covers the upper part of the side of the thorax (anterolateral chest wall). It is sandwiched between the scapula and the ribs, covered by Latissimus Dorsi

Question 2

State the attachments of this muscle

Answer 2

(PROXIMAL) fleshy digitations just anterior to the mid axillary line attaching to outer surfaces of upper 8/9 ribs and intercostal fascia.
(DISTAL) attaches to the costal surface of the medial border of scapula, between superior and inferior angles.

Question 3

Name the nerve that supplies this muscle

Answer 3

Long Thoracic Nerve (C5, C6, C7)

Question 4

State the actions of this muscle

Answer 4

Major protractor of the shoulder girdle. Lower fibres laterally rotate scapula. As a whole muscle will elevate ribs.

Question 5

Give one functional activity in which this muscle is important

Answer 5

The reaching forwards phase of pushing / punching (boxers)