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MS 1 > Lecture 9, Blood Supply, Innervation and Lymphatic Drainage of the Shoulder Girdle > Flashcards

Lecture 9, Blood Supply, Innervation and Lymphatic Drainage of the Shoulder Girdle Flashcards

1
Q

What is the brachial plexus?

A

the arrangement of nerves allows individual nerve fibers derived from different segments of the spinal cord to be distributed together to the extremities.

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2
Q

What forms the brachial plexus?

A

the anterior 1 rami of roots from C5 to T1 (sometimes C4 and T2)

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3
Q

How is the brachial plexus divided?

A

Roots
Trunks
Divisions
Cords
Branches
Nerves

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4
Q

What are the trunks of the brachial plexus?

A

superior trunk
middle trunk
inferior trunk

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5
Q

What roots form the superior trunk?

A

C5 and C6

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6
Q

What roots form the middle trunk?

A

C7

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7
Q

What roots form the inferior trunk?

A

C8 and T1

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8
Q

What are the divisions?

A

each trunk divides into an anterior and posterior division

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9
Q

What forms the posterior cord?

A

the posterior division of all three trunks

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10
Q

What forms the lateral cord?

A

the anterior division of the superior and middle trunks.

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11
Q

What forms the medial cord?

A

the anterior division of the inferior trunk

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12
Q

How do the cords get their names?

A

From their position in relation to the 2nd part of the axillary artery.

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13
Q

What are the three cords?

A

medial
lateral
posterior

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14
Q

What nerves originate from the roots?

A

dorsoscapular nerve
long thoracic nerve
phrenic nerve

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15
Q

What nerves originate from the superior trunk?

A

subclavius nerve
suprascapular nerve

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16
Q

What nerves originate from the medial cord?

A

medial pectoral nerve
medial brachial cutaneous nerve
medial antebrachial cutaneous nerve

17
Q

What terminal branches originate from the medial cord?

A

medial branch of median nerve
ulnar nerve

18
Q

What terminal branches originate from the lateral cord?

A

lateral branch of the median nerve
musculocutaneous nerve

19
Q

What individual nerve originate from the lateral cord?

A

lateral pectoral nerve

20
Q

What is the course of the long thoracic nerve?

A

lateral rib cage, quite superficially

21
Q

What is the course of the suprascapular nerve?

A

travels through the suprascapular notch deep to transverse scapular ligament

22
Q

What is the course of the ulnar nerve?

A

passes between the humeral and ulnar heads of flexor carpi ulnaris, posterior to medial epicondyle, lateral to pisiform and hook of hamate

23
Q
A

MS 1 (9 decks)

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