Skeletal muscle: Trunk

Question 1

Trapezius

Answer 1

origin: occipital bone, thoracic vertabrae
insertion: clavicle, scapula
action: elevates, depresses, retracts/adducts and rotate scapula and elevates clavicle

Question 2

Levator scapulae

Answer 2

origin: cervical vertabrae
insertion: scapula
action: elevates scapula

Question 3

rhomboid major

Answer 3

origin: thoracic vertabrae
insertion: scapula
action: retract or adduct scapula

Question 4

rhomboid minor

Answer 4

origin: c7-t1 (spinous process)
insertion: scapula
action: retract or adduct scapula

Question 5

supraspinatus

Answer 5

origin: scapula
insertion: humerus
action: abducts humerus

Question 6

infraspinatus

Answer 6

origin: scapula
insertion: humerus
action: lateral rotation of humerus

Question 7

Teres minor

Answer 7

origin: scapula
insertion: humerus
action: lateral rotation of humerus

Question 8

Subscapularis

Answer 8

origin: scapula
insertion: humerus
action: medial rotation of humerus

Question 9

Teres major

Answer 9

origin: scapula
insertion: humerus
action: extension, adduction, and medial rotation of humerus

Question 10

Deltoid

Answer 10

origin: clavicle & scapula
insertion: humerus
action: abducts humerus

Question 11

Latissimus dorsi

Answer 11

origin: lower thoracic, all lumbar vertabrae, lumbodorsal fascia, lower ribs
insertion: humerus
action: extension of humerus

~swimmers muscle; butterfly stroke

Question 12

Pectoralis major

Answer 12

origin: sternum, clavicle, ribs
insertion: humerus
action: adduction of humerus

Question 13

pectoralis minor

Answer 13

origin: ribs
insertion: scapula
action: protract scapula

Question 14

serratus anterior

Answer 14

origin: ribs
insertion: scapula
action: protract scapula

Question 15

external intercostals

Answer 15

origin: rib
insertion: rib
action: elevates ribs

Question 16

internal intercostals

Answer 16

origin: rib
insertion: rib
action: depresses rib

Question 17

rectus abdominis

Answer 17

origin: pubis
insertion: xiphoid process and ribs
action: flex vertebral column

[6 pack]

Question 18

external abdominal oblique

Answer 18

origin: ribs
insertion: linea alba and ilium
action: flex &/or laterally rotate vertebral column

Question 19

internal abdominal oblique

Answer 19

origin: ilium and lumbodorsal fascia
insertion: linea alba, pubis, ribs
action: flex &/or laterally rotate vertebral column

Question 20

transverse abdominis

Answer 20

origin: ribs, iliac crest, lumbodorsal fascia
insertion: linea alba, pubis
action: compress abdomen

[deepest layer]

Question 21

Rhomboid major and minor are responsible for what actions?

Answer 21

retraction and adduction of scapula

Question 22

identify C

Answer 22

external abdominal oblique

Question 23

identify B

Answer 23

rectus abdominis