lecture 8: pectoral girdle

Question 1

what are the 2 main bones of the pectoral girdle

Answer 1

clavicle
scapula

Question 2

is the pcetoral girdle closed?

Answer 2

no it is open posterioly
the scapula can move freely

Question 3

what is the meedial end of the clavicle

Answer 3

the sternal end

Question 4

whatt is the lateral end of the clavicle

Answer 4

the acromial end

Question 5

what does the medial end of the clav ariculae with

Answer 5

the sternum

Question 6

what doees the latreal end of the clav articulate with

Answer 6

acromion proceess

Question 7

know the aspects of the clavicle

Answer 7

sternal end
acromiinal end
grooev for subclavius
conoid tubercle

Question 8

what is the groove on the clavicle for

Answer 8

the subclavius muscle

Question 9

know how to oritent a clavicle

Answer 9

sub clav groove downwards
long convex medially and shorter concavity laterally

Question 10

what are the 3 borders and angles of the scapula

Answer 10

borders: medial, superior and lateral
angles: inferior, superior and lateral

Question 11

what is the most lateral aspect of the scapula

Answer 11

Acromion process

Question 12

what type of bone is the scapula

Answer 12

irregular bone

Question 13

what are the 4 fossa of the scap

Answer 13

subscapular
supraspinous
infraspinous
glenoid fossa

Question 14

why is the glenoid fossa diffeerent from the other scapular fossae

Answer 14

it has an articular facett (with the shoulder)

Question 15

what are the different tubercles and processees of the scapula

Answer 15

coracoid
acromion
spine
infraglenoid tubrecle
supragleenoid tubercle

Question 16

what are ethe 4 joints of the pectoral girdle

Answer 16

acromioclav joint
sternoclav jt
scapulothoracic jt
glenuhumueeral jtt

Question 17

which is not an anatomical jt
acromioclav joint
sternoclav jt
scapulothoracic jt
glenuhumueeral jtt

Answer 17

scapulothoracic

Question 18

what is the classification of tthe AC joint

Answer 18

synovial plane/glidinng

Question 19

what ligameentst make up he coracoclavicular

Answer 19

trapezoid lig
conoid lig

Question 20

true or false: the AC lig doese not allow alot of movmeent

Answer 20

true

Question 21

what is spceial about the coracoacromia lig

Answer 21

it links two parts of scapula insteead of two bones togeether

Question 22

what are the ligamentst associated witth the AC jt

Answer 22

acromioclav lig
coracoclav lig (trapezoid annd conoid)
coracoacromilia

Question 23

true or false: AC dislocaiton is common

Answer 23

false, rare, results of truama

Question 24

what is the classificaion of the sternoclav jt

Answer 24

synovial saddle

Question 25

what are the different ligs of the SC jt

Answer 25

anterior and psotterior sterno clav interclavicular costoclavicular

Question 26

what does the ac jt link

Answer 26

acromion process and the clavicle

Question 27

what does the coracoclavicular lig link

Answer 27

clavicle and the coracoid process

Question 28

what doese the coracoacromial link

Answer 28

coracoid process and acromion process

Question 29

where is the interclavicular located

Answer 29

between the clavs

Question 30

what does the anterior and potserior sternoclav lig joint

Answer 30

the stetrnum to the clavicle

Question 31

what does the costoclav lig connectc

Answer 31

the clavicle inferiorly to the costal part of rib 1

Question 32

what aree thee 3 articular surfacse oft the SC jt

Answer 32

sternal end of clavicle, manubrum, first costal carilage

Question 33

what is the axis of the saddle jt

Answer 33

biaxial jt

Question 34

explain how tthe SC jt is a saddlee jt

Answer 34

articular surfaces in thee shape of a saddle (concave along one axis and conveex along the otheer )

Question 35

true or false: ttherre is no axial rotaion at he SC jtt

Answer 35

false, there is very minimal axial rotattion

Question 36

what are the 3 types of movements at the SC jt

Answer 36

depression/elevation protraction/retraction axial roatiton

Question 37

understtand the slide about SC jt movement

Answer 37

;

Question 38

when abducting, dose the scap and clav stay stagnant

Answer 38

no , it stays constant for the first few degrees but then the clav and scap need to move =scao glides againnst the thoracic cage

Question 39

trtue or false: the scapulothoracic jt is an anatomical jt and explain

Answer 39

false, there is no capsule, no cartialge, no ligaments =it is a physiological jt

Question 40

what is the joint region of the scapulothoracic jt

Answer 40

anterior surface of scapula lying on posterior surface of ribs 2-7

Question 41

what are tthe two apposed msucle surffaces of the scapulothoracic jt

Answer 41

the subscapularis and the serrattus anterior (with loose connective tissue in nbettween to facilitate gliding)

Question 42

what is the function of tthe scapulothoracic jt

Answer 42

integrate pectoral girdle motion with shoulder joint to facilitate full abduction of shoulder complex

Question 43

what are the different types of movemnts of the pectoral girdle at the scapulothoracic jt

Answer 43

elevation/depression protraction/retraction (abd and add) updown rot/downward rot (lat/med(

Question 44

where is most of the movement at tthe scapulothoracic jt (movement of scapula on thoracic cage) happening att

Answer 44

sternoclavicular joint (less AC jt)

Question 45

what are the 2 anterior muscles of the pectoral girldle

Answer 45

subclavius pectoralis minor

Question 46

describe the attachment of the subclavious

Answer 46

attaches to the firs rib (costtal carttilage) and to tthe inferior surface of the clavicle

Question 47

what is the functiton of the subclavius muscles

Answer 47

depresses the clavicle and sttabilzes the SC jt

Question 48

what is the innervatiton of tthe subclavius

Answer 48

subclavian nerve (C5-C6)

Question 49

describe tthe attachment of the pectoralis minor

Answer 49

attachese to the anterior sied of ribs 3-5 and tto the coracoid process of the scapula

Question 50

what is the function of the pectoralis minor

Answer 50

depression, protraction and downward rotattion of the scapula

Question 51

what is the innervaiton of the pec minor

Answer 51

medial pecttoral nerve (C8-T1)

Question 52

which muscle crosses the scapulothoracic jt

Answer 52

the pec minor also the lat dorsi

Question 53

what is the lateral muscle of the pecttoral girdle

Answer 53

serratus anterior

Question 54

descrbine the attachment of the serrattus anterior

Answer 54

attaches to the lateral surface of the ribs 1-8/9 and to the anteromedial border of the scapula

Question 55

what is the innervation of the serratus anterior

Answer 55

the long thoracic n (C5-C7)

Question 56

what is the function of the seerratus anterior

Answer 56

protracts the scapula (also accessory muscle of expiration)

Question 57

wha is he cause of winged scapula

Answer 57

injury to the long tthoracic nerve (trauma, impingement(

Question 58

what does injury to the long thoracic nerve cause

Answer 58

weakness or paralysis in serratus anterior and the inability/weakness in protracitng tthe scapula

Question 59

what are the 4 muscles of the posterior pectoral girdle

Answer 59

trapexius lat dorsi lev scap rhombs minor and major

Question 60

describe the atttachment of the trapexius

Answer 60

skull/verts (C7-T12) to spine/acromion of scapula and LATERAL 1/3 of the clavicle

Question 61

what is the innervattin of the traps

Answer 61

accessory spinal n

Question 62

what is the function of the upper 1/3 ttraps

Answer 62

elevattion and upward rotation

Question 63

what is the function of the mid 1/3 ttraps (or all fibersO

Answer 63

retraction

Question 64

what is the function of the lower 1/3 ttraps

Answer 64

depression and upward rotation

Question 65

descrrbine the attachment of the lev scap

Answer 65

cervical spine to the supeerior angle/border og the scapula

Question 66

what is thee innrevation of the lev scap

Answer 66

C3-C5

Question 67

what is thee function of the lev scapula

Answer 67

elevation of scapula and some retrarcttion

Question 68

describe the attachemn of the rhomboids

Answer 68

cervical and thoracic spine to meedial border and inferior anglee of thee scapula

Question 69

what is the innervation of the rhomb

Answer 69

dorsal scapula C5

Question 70

what is the action of thee. rhombs

Answer 70

retraction, downward rotation (major). a and some. eeleevation. of the scapual

Question 71

describe the attachmentt. of tthee lat dorsi

Answer 71

from. t7-tt12. spinous proceesses, thoracolumbar fascia, ilium to thee interubercular groove of the humeurs

Question 72

what is the innervation of the lat dorsi

Answer 72

thoracodorsal n (c6-c8)

Question 73

what is the function of the lat dorsi

Answer 73

(should adduction, extnsion and medial rotation) crossese the scapulothoracic joints so has actions on scapula motion=downward rotation and some retraction, depression

Question 74

when you elevate the scapula, which ligaments are taut/tight and which are loose

Answer 74

superior capsule and interclavicykar are loose costoclav are tight

Question 75

when you depress the scapula, which ligaments are taut/tight and which are loose

Answer 75

superior capsule and interclavicykar are tight costoclav are loose

Question 76

when you do retraction/posterior movement of the clavciel, which ligs are tight and which are loose.

Answer 76

Posterior sternocalv is loose anterior sternoclav is tight and costcoclav is tight

Question 77

when you do posterior/protraction movement of the clavciel, which ligs are tight and which are loose.

Answer 77

posteriocalv is tight anterior sternoclav and costcoclav are loose