Unit One Brachial Plexus

Question 1

Thoracic outlet syndrome produced by

Answer 1

Compression of the components of the brachial plexus, subclavian artery or subclavian vein

Question 2

What are the subtype of thoracic outlet syndrome

Answer 2

Neurogenic TOS, arterial TOS and venous TOS

Question 3

The compression of TOS can be

Answer 3

Positional or static

Question 4

What occurs during positional TOS

Answer 4

Caused by movement of the clavicle and shoulder girdle with arm movement

Question 5

What occurs during static TOS

Answer 5

Caused by abnormalities or enlargement of the various muscles surrounding the arteries, veins and brachial plexus

Question 6

The presence of a cervical rib can cause a form of TOS due to

Answer 6

Compression of the lower trunk of the brachial plexus or subclavian artery

Question 7

Cervical rib and what can cause TOS

Answer 7

Scalenus muscle

Question 8

Brachial plexus is formed by union of

Answer 8

Anterior rami of C5-C8 and T1

Question 9

What are the roots of the brachial plexus

Answer 9

C5-C8, T1

Question 10

The brachial plexus roots pass laterally between

Answer 10

Anterior and middle scalene muscles

Question 11

The brachial plexus roots run along with what vessel

Answer 11

Subclavian artery

Question 12

What joins the brachial roots as they pass between the scalenes

Answer 12

Sympathetic fibers from the middle and inferior cervical ganglia

Question 13

What trunks form from the brachial roots

Answer 13

Superior, middle and inferior

Question 14

Superior trunk formed by

Answer 14

C5 and C6

Question 15

Middle trunk forms from what root

Answer 15

C7

Question 16

Inferior trunk forms from what root

Answer 16

C8 and T1

Question 17

As the trunks pass lateral to the first rib each trunk then

Answer 17

Splits into anterior and posterior divisions

Question 18

When do the trunks become divisions

Answer 18

When passing under the clavicle and enter the cervicoaxillary canal

Question 19

Anterior division of the brachial plexus innervates

Answer 19

The muscles of the anterior compartment in the arm and forearm

Question 20

The posterior division of the brachial plexus innervates

Answer 20

The muscles of the posterior compartment of the arm and forearm

Question 21

Divisions of the brachial plexus then forms what and where

Answer 21

Cords and area superior to the pectoral minor muscle

Question 22

Superior and middle anterior divisions unite to form

Answer 22

The lateral cord

Question 23

Inferior anterior division of the inferior trunk forms

Answer 23

The medial cord

Question 24

Posterior divisions unite to form the

Answer 24

Posterior cord

Question 25

What are the branches from the rami of the BP

Answer 25

Dorsal scapular and long thoracic

Question 26

Dorsal scapular nerve innervates

Answer 26

Rhomboids and levator scapulae

Question 27

Long thoracic nerve innervates

Answer 27

Serratus anterior

Question 28

Dorsal scapular nerve comes off which rami

Answer 28

C5

Question 29

Long thoracic nerve comes off what rami

Answer 29

C5, C6 and C7

Question 30

Branches from the trunk of BP

Answer 30

Nerve to subclavius

Question 31

Subclavius nerve innervates

Answer 31

Subclavius

Question 32

What branch comes off the division of BP

Answer 32

Suprascapular nerve

Question 33

Suprascapular nerve innervates

Answer 33

Supraspinatus and infraspinatus

Question 34

The supraclavicular branches are

Answer 34

Root branches, trunk branches, and division branches

Question 35

The dorsal scapular nerve pierces

Answer 35

Middle scalene and passes inferiorly to the rhomboids

Question 36

C5 also gives a root to what nerve

Answer 36

Phrenic nerve

Question 37

Phrenic nerve comes from

Answer 37

C3-C5

Question 38

Nerve to subclavius comes from what trunk

Answer 38

Superior

Question 39

The nerve to subclavius passes directly to the inferior surface of the

Answer 39

Clavicle and gives branch to sternoclavicular joint

Question 40

Suprascapular nerve comes from what division of BP

Answer 40

Anterior division of superior trunk

Question 41

Suprascapular nerves runs parallel to

Answer 41

Suprascapular artery

Question 42

How does the suprascapular n run to the scapula

Answer 42

Goes underneath suprascapular ligament of suprascapular notch to supply the supraspinatus muscle and around the greater scapular notch to the infraspinatus muscle

Question 43

What are the nerves that come from the cords

Answer 43

Lateral pectoral, medial pectoral, medial brachial cutaneous, medial antebrachial cutaneous, lower subscapular, upper subscapular, thoracodorsal nerve

Question 44

Lateral pectoral nerve innervates

Answer 44

Pectoralis major

Question 45

Medial pectoral innervates

Answer 45

Pectoral major and minor

Question 46

Medial brachial cutaneous innervates

Answer 46

Skin and medial arm

Question 47

Medial antebrachial cutaneous nerve innervates

Answer 47

Skin and medial forearm

Question 48

Lower subscapular nerve innervates

Answer 48

Teres major and subscapularis

Question 49

Upper subscapular nerve innervates

Answer 49

Subscapularis

Question 50

Thoracodorsal nerve innervates

Answer 50

Latissimus dorsi

Question 51

Brachial plexus can be divided into what two parts

Answer 51

Supraclavicular and infraclavicular

Question 52

Supraclavicular contains

Answer 52

Root, trunk and divisions

Question 53

Infraclavicular contains what of BP

Answer 53

Cords and branches

Question 54

What are the infraclavicular cords

Answer 54

Lateral, posterior, and medial

Question 55

what are the branches off of the lateral cord

Answer 55

Musculocutaneous, median, and lateral pectoral

Question 56

Musculocutaneous nerve innervates

Answer 56

Coracobrachialis, biceps brachii and brachialis

Question 57

Lateral pectoral innervates

Answer 57

Pectoralis major

Question 58

What are the branches off of the posterior cord

Answer 58

Axillary, radial, upper subscapular, lower subscapular and thoracodorsal

Question 59

Axillary nerve innervates

Answer 59

Teres minor and deltoid

Question 60

Radial nerve innervates

Answer 60

Triceps brachii, brachioradialis, extensor carpi radialis

Question 61

Upper subscapular innervates

Answer 61

Subscapularis

Question 62

Lower subscapular nerve innervates

Answer 62

Subscapularis and teres major

Question 63

Thoracodorsal nerve innervates

Answer 63

Latissimus dorsi

Question 64

What are the branches off of the medial cord

Answer 64

Ulnar, median nerve, medial pectoral, medial brachial cutaneous, medial antebrachial

Question 65

Medial pectoral nerve innervates

Answer 65

Pectoralis major and minor

Question 66

The median nerve is formed from

Answer 66

Medial and lateral cord