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BM1 Anatomy: Michealmas > Innervation of Upper Limb > Flashcards

Innervation of Upper Limb Flashcards

1
Q

What are BBC muscles innervated by?

A

musculocutaneous nerve

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2
Q

What is the triceps innervated by?

A

Radial nerve

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3
Q

What re all muscles in the posterior forearm innervated by?

A

Radial nerve

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4
Q

What is the brachial plexus?

A

Network of nerve fibres that supplies the skin and musculature of the upper limb

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5
Q

Good mnemonic for brachial plexus

A

Read That Damn Cadaver Book

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6
Q

What does the mnemonic stand for?

A

Roots, trunks, divisions, cords, branches

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7
Q

What are the roots?

A

C5, C6, C7, C8, T1

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8
Q

How many trunks are there?

A

3

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9
Q

What are the names of the trunks?

A

Superior, middle, inferior

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10
Q

Which roots form the superior trunk?

A

C5 and C6

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11
Q

Which roots form the middle trunk?

A

C7

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12
Q

Which roots form the inferior trunk?

A

C8 and T1

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13
Q

How many branches does each trunk divide into?

A

2, one going anteriorly (towards the front of the body) and one going posteriorly (towards the back of the body)

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14
Q

Where are the cords of the brachial plexus?

A

In the axilla

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15
Q

What are the three cords named relative to?

A

Their position relative to the axillary artery

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16
Q

What is the lateral cord formed by?

A

Anterior division of the superior trunk

Anterior division of the middle trunk

17
Q

What is the posterior cord formed by?

A

Posterior division of the superior trunk
Posterior division of the middle trunk
Posterior division of the inferior trunk

18
Q

What is the medial cord formed by?

A

The anterior division of the inferior trunk

19
Q

Five main nerves of upper limb

A 
Musculocutaneous
Axillary
Median
Radial
Ulnar
20
Q

Roots of musculocutaneous nerve

A

C5, C6, C7

21
Q

Motor functions of musculocutaneous

A

Innervates brachialis, biceps brachii and coracobrachialis

22
Q

Roots of axillary nerve

A

C5 and C6

23
Q

What does the axillary nerve innervate?

A

teres minor and deltoid

24
Q

Roots of median nerve

A

C6-T1

25
Q

Roots of radial nerve

A

C5-T1

26
Q

Roots of ulnar nerve

A

C8 and T1

27
Q

What is the axillary nerve responsible for?

A

Abduction from 15 to 90

28
Q

What is the deltoid innervated by?

A

Axillary nerve

29
Q

What innervates teres major

A

Lower subscapular nerve

BM1 Anatomy: Michealmas (13 decks)

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