9/11 Lecture 5: Gross Organization 2

what is the spinal cord enclosed in

vertebral column

where do the lower nerves run down to before exiting

cauda equina

what system are the spinal nerves in

pns

where do spinal nerves exit the cord

notches between each vertebra

what 2 roots attach each spinal nerve to the spinal cord

dorsal and ventral

in the spinal chord, most cells are in the … matter

inner gray matter

in the spinal chord, most axons are in the … matter

outer white matter

what tracts are in the white matter

ascending and descending

what does the ascending tract do

send sensory information from the spinal cord to the brain

what does the descending tract do

send motor signals from the brain to the spinal cord

what are the 3 parts of the meninges

dura, arachnoid, pia matter

what is the layer between the arachnoid and the pia matter

sub-arachnoid space

what fluid is found in the sub-arachnoid space

csf

where is csf made?

choroid plexus in the ventricles of the cerebrum

what is the flow of csf

ventricles to central canal to sub-arachnoid space

what happens to the csf

it is absorbed into the veins

does csf provide nutrients to the brain

no

what are the 3 major cerebral arteries

anterior, middle, posterior artery

what parts of the brain does the anterior ca supply

medial/upper

what parts of the brain does the middle ca supply

lateral

what parts of the brain does the posterior ca supply

back

does the vertebral artery feed both the spinal cord and brain

yes

does the caratoid artery feed both the spinal cord and brain

no just brain

the middle of the spinal cord controls sympathetic or parasympathetic system

sympathetic

the ends of the spinal cord controls sympathetic or parasympathetic system

parasympathetic