Spinal Cord Anatomy Flashcards
(47 cards)
3 CT coverings of meninges
- Dura mater
- Arachnoid mater
- Pia mater
What protects the SC
- Bony vertbral column
- Meninges
- Space with CSF
Space outside dura mater
epidural space
Space b/w Dura mater and Arachnoid mater
Subdural space
Space b/w Arachnoid mater and Pia mater
Subarachnoid space
Which CT layer around meninges is made of deicate collagen and elastic fibres
Arachnoid mater
Which CT layer around meninges adheres to surface of SC and brain
Pia mater
What extends from the Pia mater to suspend the SC and protect against displacement
Denticulate ligaments
Spinal Cord shape
Oval
Flattened ant and post
SC length in adults/newborns
- Medulla oblongata to L2
- Newborns to L3 or L4
Cervical enlargement location
- C4-T1
- To and from arms
Lumbar enlargement locaiton
- T9-T12
- To and from legs
End of the SC
Conus medullaris
- Extension of Pia mater
- Runs from conus medullaris to coccyx
Filum Terminale
- Spinal nerve roots at the end of the SC
- Fan out like a horses tail
Cauda Equina
What is a spinal tap
Extraction CSF for analysis
How is patient positioned for spinal tap
Lies on side, in flexed position
Which landmark is used for spinal tap
Supracristal line
Where is a spinal tap usually performed
- L3-L4
- L4-L5
Needle inserted into where during Spinal tap
Subarachnoid space
Properties of white matter
Bundles of myelinated axons
Properties of Grey Matter
- Dentrites and cell bodies of neurons
- Unmyelinated axons
Subdivisions of grey matter on each side of the SC
Horns
Posterior Grey horns contain? (2)
- Incoming sensory axons
- Cell bodies of interneurons
