Organisation of the spinal cord Flashcards
What three protective layers make up the meninges?
Dura mater, arachnoic mata and pia mater
Which layer surrounding the CNS contains blood vessels?
Pia mater
What space exists between the vertebral canal and the dura mater- what passes through here?
Epidural space.
Fatty layer where spinal nerves pass through
What space exists beneath the dura mater?
Subdural space
What space exists beneath the dura arachnoid? What does it contain
Subarachnoid space. Contains cerebral spinal fluid
Which space does lumbar punch go into and why?
Subarachnoid because it is taking a sample of cerebral spinal fluid
Define dorsal and ventral
Dorsal= posterior Ventral= anterior
What is the name for the white matter at the posterior spinal cord?
Dorsal funiculus
Describe structure of dorsal root ganglion
Thousands of cell bodies stacking on top of eachother cause a swelling. No synapsing at this location
What arteries mainly supply the spinal cord?
Vertebral arteries
What do the vertebral arteries form when they meet?
Basilar artery which travels to head
Anterior spinal artery
How does the anterior spinal artery travel?
Travels downwards through foramen magnum
Where do posterior spinal arteries travel?
Through vertebral foramen
How are spinal nerves named?
Cervical- named after one below. Elsewhere- named after one above
Why are there more cervical spinal nerves than cervical vertebrae?
First cervical nerve comes between skull and C1
