Post-Midterm Muscles

Question 1

What is the origin of the rectus abdominis?

Answer 1

pubic crest, public symphysis of pubis

Question 2

What is the insertion of the rectus abdominis?

Answer 2

cartilages of fifth, sixth, and seventh ribs and xiphoid process

Question 3

What are the actions of the rectus abdominis?

Answer 3

flexion of trunk, posterior pelvic tilt, compression of abdominal contents

Question 4

What nerve innervates the rectus abdominis

Answer 4

intercostal nerves (ventral rami)

Question 5

what is the origin of the external oblique

Answer 5

anterior portion of iliac crest, pubic bone and abdominal aponeurosis

Question 6

What is the insertion of the external oblique

Answer 6

lower eight ribs

Question 7

what are the actions of the external oblique

Answer 7

Unilateral: contralateral rotation of trunk, lateral flexion of trunk; Bilateral: flexion of trunk, posterior pelvic tilt, compression of abdominal contents

Question 8

What nerve innervates external oblique

Answer 8

intercostal nerves

Question 9

What is the origin of internal oblique

Answer 9

anterior portion of iliac crest, inguinal ligament, thoracolumbar fascia

Question 10

what is the insertion of the internal oblique

Answer 10

last 3 ribs, abdominal aponeurosis

Question 11

what are the actions of the internal oblique

Answer 11

Unilateral: ispilateral rotation of trunk,lateral flexion of trunk; Bilateral: flexion of trunk, posterior pelvic tilt, compression of abdominal contents

Question 12

what nerve innervates the internal oblique

Answer 12

intercostal nerves

Question 13

what is the origin of the transversus abdominis

Answer 13

iliac crest, inguinal ligament, thoracolumbar fascia and lower coastal cartilages

Question 14

What is the Insertion of transversus in abdominis

Answer 14

abdominal aponeurosis

Question 15

what are the actions of transversus abdominis

Answer 15

compression of abdominopelvic contents

Question 16

What nerves innervate the transversus abdominis

Answer 16

intercostal nerves

Question 17

what is the origin of the erector spinae group

Answer 17

pelvis

Question 18

what is the insertion of the erector spinae group

Answer 18

spine, rib cage, and mastoid process

Question 19

What are the functions of the erector spinae

Answer 19

Extension of trunk, ispilateral rotation of the trunk, lateral flexion of the trunk, anterior pelvic tilt

Question 20

what is the innervation of the erector spinae group

Answer 20

dorsal rami of the corresponding level

Question 21

what is the origin of the quadratus lumborum

Answer 21

transverse processes of L1-L4 and 12th rib

Question 22

What is the insertion of quadratus lumborum

Answer 22

posterior portion of iliac crest and iliolumbar ligament

Question 23

What are the actions of the quadratus lumborum

Answer 23

Unilateral: lateral flexion of trunk, elevation of the same side of the pelvis; Bilateral: Extension of trunk, anterior pelvic tilt, depression of 12th rib

Question 24

What is the innervation of quadratus lumborum

Answer 24

lumbar plexus

Question 25

What is the origin of the anterior scalene

Answer 25

Transverse process of C2 to C7

Question 26

What is the insertion of the anterior scalene

Answer 26

Scalene tubercle of rib one

Question 27

what nerve innervates the scalene muscles

Answer 27

ventral rami of cervical nerves

Question 28

What are the functions of the anterior scalene

Answer 28

flexion of neck, lateral flexion of neck, elevation of rib one

Question 29

what is the origin of the middle scalene

Answer 29

Transverse process of C2 to seven

Question 30

What is the insertion of middle scalene

Answer 30

rib one

Question 31

What are the actions of the middle scalene

Answer 31

flexion of the neck, lateral flexion of the neck, elevation of rib one

Question 32

What is the origin of the posterior scalene

Answer 32

transverse process of C5 to 7

Question 33

what is the insertion of posterior scalene

Answer 33

Rib 2

Question 34

what are the actions of the posterior scalene

Answer 34

Lateral flexion of neck, elevation of rib 2

Question 35

What muscles are included in the infrahyoids

Answer 35

sternohyoid, sternothyroid, thyrohyoid, omohyoid

Question 36

What muscles are included in the suprahyoids?

Answer 36

digastric, stylohyoid, mylohyoid, geniohyoid

Question 37

What are the actions of the infrahyoids?

Answer 37

depression of hyoid bone

Question 38

What are the actions of the suprahyoid

Answer 38

elevation of hypid

Question 39

What nerves innervate they hyoid muscles?

Answer 39

trigeminal, facial, hypoglossal and cervical plexus

Question 40

What is the origin of the gluteus maximus

Answer 40

posterior iliac crest, posterolateral sacrum, coccyx and sacrotuberous ligament

Question 41

What is the insertion of the gluteus maximus

Answer 41

IT band and gluteal tuberosity of the femur

Question 42

What are the actions of the gluteus maximus

Answer 42

extension of thigh at hip joint, lateral rotation of thigh at hip joint, abduction of thigh at hip joint(upper 1/3), adduction of thigh at hip joint(lower 2/3), posterior pelvic tilt at hip joint

Question 43

What nerve innervates the gluteus maximus

Answer 43

inferior gluteal nerve

Question 44

What is the origin of the gluteus medius

Answer 44

ilium, inferior to iliac crest in between the anterior and posterior gluteal lines

Question 45

What is the insertion of the gluteus medius

Answer 45

Greater trochanter of the femur

Question 46

What are the actions of the gluteus medius

Answer 46

abduction of thigh at hip joint, flexion of thigh at hip joint(ant fibres), medial rotation of thigh at hip joint(ant fibres), extension of thigh at hip joint(post fibres), lateral rotation of thigh at hip joint(post fibres), anterior pelvic tilt(ant fibres), posterior pelvic tilt(post fibres)

Question 47

what is the origin of the piriformis

Answer 47

anterior sacrum and anterior surface of the sacrotuberous ligament

Question 48

What is the insertion of the piriformis

Answer 48

Greater trochanter of the femur

Question 49

What are the actions of the piriformis

Answer 49

lateral rotation of thigh at the hip joint

Question 50

what nerve innervates the gluteus medius

Answer 50

superior gluteal nerve

Question 51

What innervate the piriformis

Answer 51

nerve to piriformis of Lumbrosacral plexus