gross 1- back

Question 1

3 muscle groups of the back

Answer 1

superficial
intermediate
deep

Question 2

superficial back muscles

Answer 2

anchor upper limp to axial skeleton

Question 3

intermediate back muscles

Answer 3

assists in respiration

Question 4

deep back muscles

Answer 4

maintain posture, act on vertebral column (raise and lower spine)

Question 5

extrinsic muscles

Answer 5

superficial and intermediate

Question 6

intrinsic

Answer 6

deep

Question 7

what are the superficial back muscles

Answer 7

trapezius
latissimus dorsi
levator scapulae
rhomboid major and minor

Question 8

what are the intermediate back muscles

Answer 8

serratus posterior superior

serratus posterior inferior

Question 9

what are the deep back muscles

Answer 9

semispinalis capitis
splenius capitis
spelnius cervicis
erector spinae

Question 10

innervation of superficial and intermediate back muscles

Answer 10

ventral rami

Question 11

innervation of deep back muscles

Answer 11

dorsal rami

Question 12

clinical notes of dorsal rami

Answer 12

• deep back muscles receive innervations segmentally
• overlap- loss of 1 or 2 rami will not produce clinical symptoms
• nerves do NOT cross midline (ipsilateral)

Question 13

origin of trapezius

Answer 13

• superior nuchal line
• nuchal ligament
• C7-T12 spinous process

Question 14

insertion of trapezius

Answer 14

• lateral part of clavicle

- acromion and spine of scapula

Question 15

action of trapezius

Answer 15

• elevates
• depresses
• retracts scapula

Question 16

S of trapezius

Answer 16

• accessory nerve (Xll)

- transverse cervical vessels

Question 17

accessory nerve path

Answer 17

runs deep to muscle, posterioinferiorly from jugular foramen.

Question 18

ventral rami C3-C4 path

Answer 18

runs deep to muscle. posteriorly from intervertebral foramina

Question 19

transverse cervical artery and vein

Answer 19

runs deep to muscle. posteriolaterally from thryocervical trunk

Question 20

latissimus dorsi orgin

Answer 20

• T7-T12 spinous process
• thoracolumbar fascia
• crest of ilium

Question 21

insertion of latissimus dorsi

Answer 21

intertuberculum sulcus of humerus

Question 22

action of latissimus dorsi

Answer 22

adducts
extends
medially rotates humerus

Question 23

s of latissimus dorsi

Answer 23

thoracodorsal nerve and vessels

intercoastal vessels

Question 24

rhomboids orgin

Answer 24

C7-T5 spinous process

Question 25

rhomboids insertion

Answer 25

medial boarder of scapula from spine to inferior angle

Question 26

rhomboids action

Answer 26

retract scapula

Question 27

s of rhomboids

Answer 27

dorsal scapular nerve and vessels

Question 28

levator scapulae orgin, insertion, action, s

Answer 28

orgin- transverse process of 1st 3-4 vertebrae
insertion- upper medial boarder of scapula
action- elevates scapula
s- dorsal scapular nerve and vessels

Question 29

serratus anterior orgin, insertion, action, s

Answer 29

orgin- lateral surface of 1st 8 ribs
insertion- anterior surface of medial boarder of scapula
action- protracts scapula and holds it to wall
supply- long thoracic nerve and lateral thoracic vessels

Question 30

triangle of auscultation

Answer 30

=to listen to
between 6 and 7th rib
listening to organs of the thorax

Question 31

boundaries of the triangle of auscultation

Answer 31

superior- trapequiz
inferior- latissimus dorsi
lateral- rhomboid major
floor- 6th inter coastal space

Question 32

lumbar triangle boundaries

Answer 32

medial- latissimus dorsi
lateral- external oblique
inferior- ilaic crest
floor- internal oblique

Question 33

site of lumbar hernia

Answer 33

lumbar triangle

Question 34

serratus posterior superior orgin, insertion, action, supply

Answer 34

orgin- spinous process C7-T3
insertion- superior boarder of ribs 2-5
action- elevate upper ribs
supply- 1st 4 intercostal nerves and vessels

Question 35

serratus posterior inferior orgin, insertion, action, supply

Answer 35

orgin- spinous process T11-L2
insertion- inferior boarder of ribs 8-12
action- depress lower ribs
supply- last 4 intercostal nerves and vessels

Question 36

erector spinae muscles orgin, insertion, action, supply

Answer 36

orgin- posterior sacrum, ilium and spinous process
insertion- spinous processes, transverse processes and ribs
action- erect spine
supply- dorsal rami of spinal nerves and lumbar and intercostal vessels

Question 37

splenius capitis and cervicis

Answer 37

orgin- nuchal ligament and upper spinous processes
insertion (capitis)- occipital bone and mastoid process
insertion (cervicis)- upper cervical transverse process
action- extend and laterally rotate neck
supply- dorsal rami of spinal nerves and deep cervical vessels

Question 38

semispinalis capitis and cervicis O, I, A, S

Answer 38

orgin- upper thoracic transverse process
insertion (cap)- occipital bone between nuchal lines
insertion (cerv)- upper cervical spines
action- extend head and neck
supply- dorsal rami of spinal nerve and deep cervical vessels

Question 39

multifidus O, I, A, S

Answer 39

orgin- sacrum and lower transverse processes
insertion- spinous processes
action- laterally flexes and rotates spine
supply- dorsal rami of spinal nerves and lumbar vessels

Question 40

rotatores O, I, A, S

Answer 40

orgin- transverse processes
insertion- spinous processes
action- rotate spine
supply- dorsal rami of spinal nerves and intercostal vessels

Question 41

interspinalis muscle

Answer 41

between spinous processes,

minor extensions of spine

Question 42

intertransversarius

Answer 42

between transverse processes

minor lateral flexion of spine

Question 43

levator costarum

Answer 43

from transverse processes to ribs

minor elevations of ribs