Superficial Back Muscles

Question 1

Latissimus dorsi

(attachment)

Answer 1

Attaches at:

• spinous processes of thoracic and lumbar vertebrae
• iliac crest
• lower ribs

AND:

-the intertubercular sulcus (bicipital groove) of the humerus

Question 2

Latissimus dorsi

(innervation)

Answer 2

Thoracodorsal nerve (C6-C8)

Question 3

Latissimus dorsi

(action)

Answer 3

Extends, Adducts, & Medially Rotates the arm

Question 4

Trapezius-Ascending

(attachment)

Answer 4

Attaches at:

-spinous processes of thoracic vertebra

AND

-spine of scapula

Question 5

Trapezius-Ascending

(innervation)

Answer 5

• spinal accessory nerve (motor C1-C5)
• anterior rami of C3&C4

Question 6

Trapezius-Ascending

(Action)

Answer 6

depresses the scapula

(along with the descending–rotates the scapula superiorly)

Question 7

Trapezius-Middle

(attachment)

Answer 7

Attaches at:

-spinous processes of thoracic vertebra

AND

-spine of scapula

Question 8

Trapezius-Middle

(innervation)

Answer 8

spinal accessory nerve (motor of C1-C5)

AND

anterior rami of C3&C4

Question 9

Trapezius-Middle

(action)

Answer 9

Retracts scapula

Question 10

Trapezius-Descending

(attachment)

Answer 10

Attaches at:

• superior nuchal line
• nuchal ligament
• external occipital protuberance

AND

• clavicle
• acromion of scapula

Question 11

Trapezius-Descending

(innervation)

Answer 11

Spinal Accessory Nerve (motor C1-C5)

AND

Anterior Rami of C3&C4

Question 12

Trapezius-Descending

(action)

Answer 12

Elevates Scapula

(along with ascending-rotates scapula superiorly)

Question 13

Levator scapulae

(Attachment)

Answer 13

Attaches to:

-transverse processes of cervical vertebrae

AND

medial border of scapula

Question 14

Levator scapulae

(innervation)

Answer 14

Dorsal Scapular Nerve (C5)

AND

Anterior rami of C3 and C4

Question 15

Levator scapulae

(action)

Answer 15

Elevates scapula

Rotates scapula inferiorly

Question 16

Rhomboids

(attachments)

Answer 16

Both attach to the medial border of the scapula

AND

• the minor attaches to the spinous processes of C7 and T1
• the major attaches to the spinous processes of the upper thoracic vertebrae

Question 17

Rhomboids

(innervation)

Answer 17

Dorsal Scapular nerve (C4-C5)

Question 18

Rhomboids

(action)

Answer 18

Retract Scapula

Rotate Scapula Inferiorly