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Anatomy > Brachial Plexus > Flashcards

Brachial Plexus Flashcards

1
Q

what are the roots of the brachial plexus?

A

C5 C6

C7

C8 T1

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2
Q

what are the trunks of the brachial plexus?

A

superior is formed by C5 C6
middle trunk is formed by C7
inferior trunk is formed by C8 T1

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3
Q

what is the gross anatomy of the brachial plexus?

A

roots, trunks, divisions, cords

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4
Q

what happens after the trunks?

A

the trunks divide into anterior and posterior divisions

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5
Q

what do the anterior and posterior divisions create?

A

the CORDS
Lateral
Posterior
Medial

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6
Q

what part of brachial plexus is behind the clavicle ?

A

the divisions

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7
Q

What also runs alongside the brachial plexus (cords)?

A

Axillary artery and vein which are enclosed in the axillary sheath

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8
Q

what part of brachial plexus is behind in the axilla ?

A

the cords

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9
Q

how is the posterior cord formed?

A

From ALL posterior branches of the three divisions

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10
Q

what does the axillary artery runs into (medially)

A

the subclavian artery

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11
Q

What does the median nerve innervate?

A

all the flexors in the forearm except the flexor carpi ulnaris and the flexor digitorum profundus.
In the hand (palmar aspect) it innervates 1st/ 2nd lumbricals, and the thenar eminence. Nail beds.
Only nerve that goes through the carpal tunnel.

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12
Q

what nerve comes off the root of C5?

A

dorsal scapular nerve

Inn. Rhomboids

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13
Q

what nerve comes off roots of C5 C6 C7?

A

Long thoracic nerve

Inn. serratus anterior muscle

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14
Q

what two nerves come off the Superior trunk?

A

Suprascapular nerve -
Inn. supraspinatus and infraspinatus muscles.
* supplies nerves that ‘sit on top’ of scapula - suprascapular

Subclavius nerve -
Inn. subclavius muscle

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15
Q

What trunks/ divisions make up the lateral cord?

A

C5 C6 - anterior division of superior trunk

C7 - anterior division of middle trunk

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16
Q

What trunks/ divisions make up the posterior cord?

A

Posterior divisions from ; superior trunk, middle trunk, & inferior trunk.

17
Q

What trunks/ divisions make up the medial cord?

A

anterior division from inferior trunk

18
Q

What do the anterior cords give rise to?

A

nerves which innervate the anterior compartment

19
Q

what do the posterior cords give rise to?

A

nerves which innervate the posterior compartment

20
Q

which anterior cords innervate the anterior compartment?

A

lateral cord and the medial cord (since these are made up of anterior divisions)

21
Q

how many terminal nerves are there?

A

five … My Auntie Rapped My Uncle

22
Q

My Auntie Rapped My Uncle

A 
lateral/posterior/medial
Musculocutaneous
Auxillary
Radial
Median
Ulnar

Anatomy (33 decks)

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