What My Brother Told Me

The spinal cord has the following nerves:
from the top
Cranial
1
2
3
4 ————| C1-4 innervates the neck
5 ————| C5 – T1 innervates the upper limbs
6
7
8
Thoracic
1————-|
2————-| T2 – L1 innervates the trunk (including the abdomen and the intercostal muscles between the ribs)
3
4
5
6
7
8
9
10
11
12
Lumbar
1————-|
2————-| L2 – S2 innervates the lower limbs
3
4
5
Sacral
1
2————-|
3————-| S3 – Co2 innervates the buttox
4
5
Coccygeal (in some people)
1
2

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2 thoughts on “What My Brother Told Me

  1. i don’t know if you’re a mnemonic person, but:

    -C3,4,5 keeps the diaphragm alive (refers to the phrenic nerve, innervating the diaphragm)

    -S2,3,4 keeps the urine off the floor (refers to the pudendal nerve, innervating the bladder)

    as advertized: huge nerd.

  2. Thanks for those mnemonics. Prof Stewart gave us the first one but said “you can figure out” the second. I made up my own but it had the word crap in it. Better urine.

    Who are you?

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