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Flashcards in gross 1- back Deck (43)
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1

3 muscle groups of the back

superficial
intermediate
deep

2

superficial back muscles

anchor upper limp to axial skeleton

3

intermediate back muscles

assists in respiration

4

deep back muscles

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

5

extrinsic muscles

superficial and intermediate

6

intrinsic

deep

7

what are the superficial back muscles

trapezius
latissimus dorsi
levator scapulae
rhomboid major and minor

8

what are the intermediate back muscles

serratus posterior superior
serratus posterior inferior

9

what are the deep back muscles

semispinalis capitis
splenius capitis
spelnius cervicis
erector spinae

10

innervation of superficial and intermediate back muscles

ventral rami

11

innervation of deep back muscles

dorsal rami

12

clinical notes of dorsal rami

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

13

origin of trapezius

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

14

insertion of trapezius

- lateral part of clavicle
- acromion and spine of scapula

15

action of trapezius

- elevates
- depresses
- retracts scapula

16

S of trapezius

- accessory nerve (Xll)
- transverse cervical vessels

17

accessory nerve path

runs deep to muscle, posterioinferiorly from jugular foramen.

18

ventral rami C3-C4 path

runs deep to muscle. posteriorly from intervertebral foramina

19

transverse cervical artery and vein

runs deep to muscle. posteriolaterally from thryocervical trunk

20

latissimus dorsi orgin

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

21

insertion of latissimus dorsi

intertuberculum sulcus of humerus

22

action of latissimus dorsi

adducts
extends
medially rotates humerus

23

s of latissimus dorsi

thoracodorsal nerve and vessels
intercoastal vessels

24

rhomboids orgin

C7-T5 spinous process

25

rhomboids insertion

medial boarder of scapula from spine to inferior angle

26

rhomboids action

retract scapula

27

s of rhomboids

dorsal scapular nerve and vessels

28

levator scapulae orgin, insertion, action, s

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

29

serratus anterior orgin, insertion, action, s

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

30

triangle of auscultation

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