Anatomy 1 - CNS Flashcards
What is the central nervous system?
brain and spinal cord, integrates and coordinates incoming/outgoing neural signals and carry out higher mental functions
What is the peripheral nervous system?
comprised of everything that isn’t CNS
What are the components of the CNS?
- brain and spinal cord
- layers: pia, arachnoid, dura mater
- cells: oligodendrocytes, astroctes, ependymal cells, microglial cells
What are the components of PNS?
- satellite and schwann cells
- neurons outside the nervous system
What is the somatic nervous system?
- sensory and motor info to all parts of the body
- sensory = touch, pain, position, sensation
- motor = skeletal muscles for voluntary and reflective movements
What is the autonomic nervous system?
- involuntary, autonomic reflexes and visceral function and pain
- parasympathetic = body conservation
- sympathetic = fight or flight
What are some functional differences between the autonomic and somatic nervous systems?
somatic is generally voluntary and autonomic is generally involuntary
What is grey and white matter in regards to neurons?
grey: cell bodies and unmyelinated axons
white: myelinated axons
Where does cauda equina commence?
L1/L2
What is the brachial plexus formed by?
C5, C6, C7, C8, T1
What is the lumbosacral plexus formed by?
T12-S4
What are the two main structures of the CNS?
brain and spinal cord
What bony structures protect the CNS?
spinal cord, cranium
What are the meninges?
pi, dura, arachnoid
-found in spinal cord and brain
Where is the epidural space?
space between dura mater and vertebral wall,
