Brachial Plexus Flashcards

1
Q

What does the brachial plexus supply

A

Upper limb (C5-T1)

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2
Q

Give anatomical relations of the roots of the brachial plexus

A

Exit their respective intervertebral foraminae between scalene muscles

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3
Q

Give anatomical relations of the trunks of the brachial plexus

A

Lying on first rib posterior to the third part of subclavian artery

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4
Q

Give anatomical relations of the divisions of the brachial plexus

A

Behind the middle third of clavicle

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5
Q

Give anatomical relations of cords of the brachial plexus

A

In the axilla, intimate relation with second part of axillary artery

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6
Q

Terminal branches

A

In relation with third part of axillary artery

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7
Q

Which cord terminates to musculocutaneous nerve

A

Lateral cord

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8
Q

Which cord terminates to median nerve

A

Lateral and medial cord

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9
Q

Which cord terminates to radial nerve

A

Posterior cord

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10
Q

Which cord terminates to ulnar nerve

A

Medial cord

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11
Q

Which part of the vertebrae innervates the lateral cord

A

C5-C6 (C7 to some extent)

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12
Q

What part of the vertebrae innervates the posterior cord

A

C7 (but to some degree all others do influence it I.e C5-T1)

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13
Q

Which part of the vertebrae innervates the medial cord

A

C8 and T1

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14
Q

What does the C5 root supply

A
Phrenic nerve (diaphragm)
Dorsal scapular nerve (rhomboid major and minor muscles)
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15
Q

Which cord supplies the anterior parts of the arm and forearm

A

Medial and lateral cords

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16
Q

Which cord supplies the posterior compartment of the arm and forearm

A

Posterior cord

17
Q

Which cord terminates to axillary nerve

A

Posterior cord

18
Q

What are dermatomes

A

Strip of skin supplied by a single spinal segment

19
Q

What are myotomes

A

Muscles that one particular nerve root supplies

20
Q

What supplies proximal muscles of the upper limb

A

Superior roots of the brachial plexus (deltoid C5-6)

21
Q

What supplies the distal muscles of the upper limb

A

Inferior roots of the brachial plexus (muscles of the hand T1)