Brachial Plexus Flashcards

1
Q

The brachial plexus is a collection of

A

nerves and consists of roots, trunks, divisions, and cords

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2
Q

Roots are formed from

A

Primary rami of the 5,6,7,8 cervical and 1st thoracic nerves

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3
Q

Upper trunk is formed from
Middle trunk is formed from
Lower trunk is formed from

A

5&6th cervical roots
7th cervical root
8th cervical & 1st thoracic root

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4
Q

The 3 trunks lie

A

above the clavicle in the neck

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5
Q

Divisions

A

Each trunk divides behind the clavicle into anterior and posterior divisions

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6
Q

Cords

A

Medial Cord- formed by anterior division of lower trunk
Lateral Cord- formed by anterior division of middle & upper trunks
Posterior Cord- formed by fusion of posterior divisions of 3 trunks

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7
Q

All branches of the lateral and medial cords supply the

A

flexor side

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8
Q

All branches of the posterior cord supply the

A

extensor side

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9
Q

Roots and trunk lie

A

in the neck

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10
Q

Divisions lie

A

in apex of axilla behind clavicle

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11
Q

Cords and its branches lie

A

in the axilla

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12
Q

Nerve to rhomboids is also called

A

dorsal scapular nerve

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13
Q

nerve to rhomboids arises from

A

root of C5

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14
Q

nerve to rhomboids supplies the

A

scapula
levator scapulae
rhomboid muscle

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15
Q

nerve to serratus anterior is also called

A

long thoracic nerve

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16
Q

nerve to serratus anterior arises from

A

roots of C5,6,7

17
Q

nerve to serratus anterior supplies the

A

serratus anterior muscle

18
Q

nerve to subclavius arises from

A

upper trunk

19
Q

suprascapular nerve arises from

A

upper trunk

20
Q

suprascapular nerve supplies the

A

supraspinatus muscle, infraspinatus muscle, acromioclavicular and shoulder joints

21
Q

branches of lateral cord

A
  1. musculocutaneous nerve
  2. lateral root of median nerve
  3. lateral pectoral nerve
22
Q

lateral pectoral nerve supplies the _____ by piercing the ____

A

pectoralis major

pierces the clavi pectoral fascia

23
Q

branches of the medial cord

A
  1. ulnar nerve
  2. medial root of median nerve
  3. medial pectoral nerve
  4. medial cutaneous nerve of arm
  5. medial cutaneous nerve of forearm
    4MU
24
Q

medial pectoral nerve supplies

A

pectoralis minor and pectoralis major

25
Q

medial cutaneous nerve of the arm supplies the

A

skin on lower half of arm

26
Q

branches of the posterior cord

A
  1. radial nerve
  2. axillary/circumflex nerve
  3. upper subscapular nerve
  4. lower subscapular nerve
  5. nerve to latissimus dorsi
    RAUL N
27
Q

axillary (circumflex) nerve divides into
supplies
becomes

A

anterior branch- deltoid muscle

posterior branch- becomes upper lateral cutaneous nerve of arm

28
Q

upper subscapular nerve supplies

A

upper part of subscapularis muscle

29
Q

lower subscapular nerve supplies

A

lower part of subscapularis muscle and teres major muscle

30
Q

nerve to latissimus dorsi is also called

A

thoraco dorsal nerve