Axilla And Brachial Plexus

Question 1

Anterior Axillary Fold and Posterior Axillary Fold formed by

Answer 1

Anterior: pectoralis major
Posterior: Latissimus and teres major

Question 2

Brachial plexus innervation

Answer 2

• C5-T1

- Entire upper extremity plus others

Question 3

Flow of lymph in upper extremity

Answer 3

-Distal to proximal

Question 4

Proximal sequence of Lymphatic Drainage from upper extremity

Answer 4

Humeral, pectoral, and subscapular nodes drain to central axillary to apical axillary to subclavian nodes

Question 5

Musculocutaneous N travels

Answer 5

Anterior arm

Question 6

Radial n travels

Answer 6

Posterior arm, lateral forearm

Question 7

Median n travels

Answer 7

Forearm and hand

Question 8

Ulnar N travels

Answer 8

Forearm and hand

Question 9

Brachial plexus proximal to distal general structure

Answer 9

Spinal nerves to rami to trunks to divisions to cord to terminals

Question 10

Terminal branches

Answer 10

Musculocutaneous
Radial
Median
Ulnar

FORM M-SHAPE

Question 11

Trunk, cord, and rami locations

Answer 11

Rami- passes between scalene muscle
Trunks- neck
Cords- axilla

Question 12

Dorsal scapular nerve rami

Answer 12

C5

Question 13

Long thoracic N rami

Answer 13

C5-C7

Question 14

Suprascapular N rami

Answer 14

From superior trunk, C5-C6

Question 15

L/Medial pectoral Nerve roots

Answer 15

Lateral pectoral: C5-C7, Lateral cord

Medial Pectoral: C8-T1, Medial Cord

Question 16

Thoracodorsal Nerve roots

Answer 16

Posterior cord, C6-C8

Question 17

Subscapular N roots

Answer 17

Posterior Cord, C5-C6

Question 18

Musculocutaneous Roots

Answer 18

Lateral Cord, C5-C7

Question 19

Motor fxn and muscles innervation by musculocutaneous N

Answer 19

• Anterior arm compartment, flexors

- Brachialis, coracobrachialis, Biceps

Question 20

Sensory fxn of musculocutaneous

Answer 20

Continues as lateral antebrachial cutaneous nerve

Question 21

Median N roots

Answer 21

Lateral and Medial Cords (C6-T1)

Question 22

Median N motor fxn and muscles inn

Answer 22

Motor: anterior compartment of forearm, hand

-Muscles: flexors of wrist and fingers, pronation

Question 23

Sensory fxn of median nerve

Answer 23

Cutaneous territory in hand

-Thumb, index, middle finger, half of ring finger

Question 24

Clinical significance of Median N

Answer 24

Carpal tunnel syndrome

Question 25

Ulnar nerve branches

Answer 25

Medial cord, C7-T1

Question 26

Motor and muscles inn by ulnar nerve

Answer 26

Anterior compartment of forearm, hand Mostly flexors of the wrist and fingers

Question 27

Sensory fxn of ulnar N

Answer 27

Distal left side of forearm | -Pinky, half of ring finger

Question 28

Radial n roots

Answer 28

Posterior cord, C5-T1

Question 29

Motor and muscles inn by radial n

Answer 29

- Anterior Compartment of forearm, hand | - Muscles: mostly extensors of arm, wrist, fingers

Question 30

Sensory fxn of radial n

Answer 30

-Cutaneous territory in arm, forearm, hand

Question 31

Ulnar n clinical significance

Answer 31

Injury at elbow, wrist

Question 32

Clinical significance of Radial N

Answer 32

Compression injury at axilla

Question 33

C5 mediations what action

Answer 33

-Arm abduction at shoulder

Question 34

C5/C6 mediates what action

Answer 34

Flexion at the elbow and biceps reflex

Question 35

C6

Answer 35

Mediates wrist extension

Question 36

C7 mediates

Answer 36

Elbow extension

Question 37

L4 mediates what action

Answer 37

Leg extension at the knee and Patellar Tendon reflex

Question 38

L5 Mediates what action

Answer 38

Doris flexion at ankle

Question 39

S1 mediates what action

Answer 39

Plantar flexion at the ankle and Achilles’ tendon reflex

Question 40

Anterior Dermatomes from top of face to nipple

Answer 40

V1, V2, V3, C3 (neck), C4, C5, T1, T2, T3, T4

Question 41

Anterior Dermatome from nipple to foot

Answer 41

T4 (nipple), T10 (ublicus), L1 (iliac crest), L2-L5 legs

Question 42

Cutaneous Sensory Nerve Territories from shoulder to hand

Answer 42

SARLACIM ``` Supraclavicular (C3.C4) Axillary Radial Lateral Antebrachial cutaneous Intercostal-brachial nerve/Medial brachial cutaneous Medial antebrachial cutaneous ```

Question 43

Cervical Plexus origins and innervation

Answer 43

C1-C4 | Neck