Unit 4 Lecture 30 Flashcards
How do nerves enter and exit the spinal cord?
In segments
Label the spinal nerves
Cervical nerves - 8
Thoratic nerves - 12
Lumbar nerves - 5
Sacral nerves - 5
Coccygeal nerves - 1
What is an enlargement in the spinal cord?
Thick parts of the spinal cord where there’s a lot of nerves
- the extra nerves are supplying limbs
What are the 3 main enlargements of the spinal cord?
- Cervical enlargement
- Lumbar enlargement
- Cauda Equina
Where is the cervical enlargement?
C4-T1
What do the nerves at the cervical enlargement supply?
Shoulder girdle and upper limbs
Where is the lumbar enlargement?
T9-T12
What do the nerves at the lumbar enlargement supply?
Pelvis and lower limbs
Where is the Cauda Equina?
The long nerves at the end of the spinal cord (horse tail)
What do the nerves in the cauda equina PROBABLY supply?
bladder, lower limbs, pelvis
What are plexus?
A bundle of nerves
Where is the cervical plexus?
C1-C5
Where is the Brachial plexus?
C5-T1
Where is the lumbar plexus?
L1-L4
Where is the sacral plexus?
L4-S4
How does a spinal tap work?
Spinal cord proper ends at L2 and the dura/arachnoid layers end at S2…… this makes a cavity to withdraw CSF
