How to Draw Brachial Plexus Online Lecture (1)

7/25/2019 How to Draw Brachial Plexus Online Lecture (1)

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Brachial Plexus

By Dr. M. Tracy-Bee


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Why do we learn about the brachial

plexus

Its one o the !ost i!portant structures

"i#in" ner#ous supply to !ost o the

structures in the upper li!b

$ou can read about it in your notes% but let

!e "i#e you so!e ad#ice in how to learn

it% understand it% and solidiy it into your

brain

&a#e a stron" understandin" o the

anato!y o the brachial plexus will ser#e

you well o#er your career and lie


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's we learn about the plexus% well reer

bac( to this dia"ra!% with the branches.

This is the one that you should learn well.

The plexus on the pre#ious pa"e in your

notes is helpul when startin" and learnin"

about the base structure


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)whoa* Thats a lot to learn+

$es% it see!s o#erwhel!in" to start% but i

you study and learn it in a si!ple way% it

will bac( this see! less co!plex.

,ets try


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&ere is an easy way to draw it%

draw strai"ht lines


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ow add two s!all lines


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ext% label the ra!i

C5

C6

C7

C8

T1


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This or!s the trun(s% lets write

the! in

C5

C6

C7

C8

T1

/pper trun(

Middle trun(

,ower trun(


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ow% draw out the posterior

di#isions co!in" to"ether to or!

the posterior cordC5

C6

C7

C8

T1

Posterior cord


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ow% draw out the anterior di#ision

headin" up to the upper trun(

C5

C6

C7

C8

T1


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,ets draw out both the0

anterior di#isions 1in purple2 and

posterior di#ision 1in blue2C5

C6

C7

C8

T1

3 h h i di i i


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3ee how the anterior di#isions o

the upper trun( and !iddle trun(

!a(e up the lateral cordC5

C6

C7

C8

T1

lateral cord

3 h th t i di i i


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3ee how the anterior di#isions o

the lower trun( !a(es up the

!edial cordC5

C6

C7

C8

T1

!edial cord

3 h th t i di i i ll


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3ee how the posterior di#isions all

co!e to"ether to !a(e up the

posterior cordC5

C6

C7

C8

T1

Posterior cord

Wh t h t


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What happens next

The !edial and lateral cord

co!bine to or!C5

C6

C7

C8

T1

Median ner#e

4e!e!ber that its the

Median ner#e

not the !edia, ner#e

Wh t h t


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What happens next

The !edial and lateral cord

co!bine to or!C5

C6

C7

C8

T1

Median ner#e

This is our )M+ that we see

in the lab


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,ets loo( at this on your dia"ra!

,earnin" the plexus

To help !e!ori5e the brachial plexus% well ind the )M+startin" at the ner#e that pierces the coracobrachialis!uscle.

,ets say it all to"ether

Musculocutaneous ner#e

,ateral cord

,ateral root

Median ner#e

Medial root

Medial cord

/lnar ner#eThe colors on the dia"ra!

correspond to the ones onthe list abo#e


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Dont or"et that posterior to this is the

P63T74I64 864D.

Its bi""est branch is the 4'DI', 7497


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,ets "o bac( to your drawin"% now we need

to add on :; the branches0

.C5

C6

C7

C8

T1This is our )M+ that we see

in the lab


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Draw in one line abo#e and below the upper

trun(C5

C6

C7

C8

T1This is our )M+ that we see

in the lab


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ow draw one line directed upward on the

top ? cordsC5

C6

C7

C8

T1


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'nd draw three lines directed downward on

the botto! ? cordsC5

C6

C7

C8

T1


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Thats a @uic( and easy way to

draw the plexus. I encoura"eyou to draw it out daily until you

ha#e it !e!ori5ed in your head.

'lso read throu"h the notes and

"o throu"h the re#iew.


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How to Draw Brachial Plexus Online Lecture (1)