cns anatomy - minerva · cns anatomy. contents •overview need to read up components of the cns -...
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CNS anatomy
Contents
• OVERVIEW need to read up
Components of the CNS
- Spinal cord
– Meninges
– Dural folds and sinuses
– CSF
– Blood supply circle of Willis
PNS
Nervous system (NS)
Somatic NS
(Voluntary)Autonomic NS
(Automatic)
Somatic Receptors
Somatic effectors
(skeletal muscle)
Visceral receptors
Autonomic effectors
CNS
P S
Spinal cord
• Lies in the spinal cavity
• From Foramen magnum to L1
• 45cm / 18 inches
• 2 bulges at cervical and lumbar region
•Grey & white matter•Divisions•Funiculi tracts•Spinal roots (Dorsal –sensory, Anterior - motor)
Functions-Passage for info to brain- spinal reflexes
Meninges
• Protective coverings
Spaces- Epidural- Subdural- Subarachnoid
The dural folds & sinuses
Blood supply to the brainSupply the different territories of the brain
Vascular territories
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