Muscles that move the Pectoral Girdle

Question 1

Levator Scapulae

A) Origin
B) Insertion
C) Innervation
D) Action (2)

Answer 1

A) Origin: Transverse process of first four cervical vertebrae
B) Insertion: Medial Border of Scapula
C) Innervation: Dorsal Scapular Nerve
D) Elevation and medial rotation of the scapula

Question 2

Trapezius

A) Origin
B) Insertion
C) Innervation
D) Action (3)

Answer 2

A) Origin: Ligamentum Nuchae, superior nuchal line
B) Insertion: Clavicle and Scapula
C) Innervation: Accessory Nerve
D) Elevation of Scapula (upper fibres), retraction of scapula (middle fibres) and depression of scapula (lower fibres), lateral rotation

Question 3

Rhomboid Minor

A) Origin
B) Insertion
C) Innervation
D) Action (3)

Answer 3

A) Origin: Spinous Process of C7-T1
B) Insertion: Medial Border of the Scapula
C) Innervation: Dorsal Scapular Nerve
D) Action: Retraction, Elevation and Rotation of the Scapula

Question 4

Rhomboid Major

A) Origin
B) Insertion
C) Innervation
D) Action (3)

Answer 4

A) Origin: Spinous Process of T2-T5
B) Insertion: Medial Border of Scapula between spine and inferior angle
C) Innervation: Dorsal Scapular Nerve
D) Action: Retraction, Elevation and Rotation of the Scapula

Question 5

Pectoralis Minor

A) Origin
B) Insertion
C) Innervation
D) Action (2)

Answer 5

A) Origin: 3rd to 5th ribs
B) Insertion: coracoid process of the scapula
C) Innervation: Medial Pectoral nerve
D) Action: Protraction and medial rotation