superficial back muscles

Question 1

what are the superficial back muscles

Answer 1

trapezius
rhomboid major and minor
levator scapulae
latissimus dorsi

Question 2

origin of trapezius

Answer 2

vertebral column (C7-T12)
superior nuchal line
external occipital protuberance

Question 3

insertion of trapezius

Answer 3

Lateral 1/3rd of clavicle, Acromion and Spine of Scapula

Question 4

movement of trapezius

Answer 4

Assists rotation of the scapula during abduction of humerus above horizontal; Upper fibres elevate, middle fibres adduct, lower fibres depress scapula.

Question 5

innervation of trapezius

Answer 5

accessory nerve (motor)
cervical spinal nerves C3 and C4 (motor and sensation)

Question 6

blood supply of trapezius

Answer 6

superficial branch of transverse cervical artery, acromial branch of the suprascapular artery, dorsal branches of posterior intercostal arteries

Question 7

origin of rhomboid major

Answer 7

spinous processes (T2-T5), supraspinous ligament

Question 8

insertion of rhomboid major

Answer 8

medical border of scapula between spine and inferior angle of scapula

Question 9

movement of rhomboid major and minor

Answer 9

work with each other to retract and elevate scapula

Question 10

innervation of rhomboid minor and major

Answer 10

dorsal scapular nerve

Question 11

blood supply of rhomboid major and minor

Answer 11

dorsal scapular artery

Question 12

origin of rhomboid minor

Answer 12

spinous processes (C7-T1), inferior border of nuchal ligament, intervening supraspinous ligaments

Question 13

insertion of rhomboid minor

Answer 13

medial border of scapula at level of scapular spine

Question 14

innervation of latissimus dorsi

Answer 14

thoracodorsal nerve

Question 15

origin of latissimus dorsi

Answer 15

Spinous processes of T7 to T12, 9th to 12th ribs, the lumbar and sacral vertebrae (via the thoracolumbar fascia), and the posterior third of the external lip of the iliac crest

Question 16

insertion of latissimus dorsi

Answer 16

Floor of bicipital groove of humerus after spiralling around teres major

Question 17

blood supply of latissimus dorsi

Answer 17

Thoracodorsal artery from the axillary artery and, occasionally, a branch from the subscapular artery

Question 18

origin of levator scapulae

Answer 18

transverse processes of C1 to C4

Question 19

insertion of levator scapulae

Answer 19

upper portion medial border of scapula

Question 20

movement of levator scapulae

Answer 20

elevates scapula

Question 21

innervation of levator scapulae

Answer 21

C3 to C4 and dorsal scapular nerve

Question 22

blood supply for levator scapulae

Answer 22

branches from transverse and ascending cervical arteries