CNS Flashcards
Ganglion
= collection of cell bodies located outside the CNS.
Nucleus
= collection of cell bodies located inside the CNS.
Gray matter
area of unmyelinated neurons
White matter
myelinated fiber tracts
Myelinated fibers found in..
Peripheral nerves
Non-myelinated fibers found in…
Brain and spinal cord.
Sensory neurons..
carry signals from outher parts of body (periphery) into CNS.
Motor neurons
= carry signals from CNS to the outer parts (muscle, skin, glands)
Myelin is made of..
fat
Function of Myelin..
speed transmission of nerve impulse down a long axon
is made of fat.
Bipolar
Interneuron
Unipolar
= Sensorsy Neuron
Multipolar
Motorneuron
Interneurons
connect neurons within the brain and spinal cord
Meninges
= membranes that sourrounds brain and spinal cord
1. Pia mater - innermost
2. Arachnoid mater
3. Dura mater - outermost
- Bone
- Periosteum
- Aponeurosis
- Skin
Spaces
Epidural: fat filled
- external to the dura
Subdural: serous fluid
Subarachnoid: filled with CSF
- between pia mater and arachnoid
Neuroganglia
= glial cells or simply glia, non-neuronal cells. in the CNS ans PNS which form Myelin and provide support and protection for neurons.
What structute is this?
Basila artery
What structure is this?
Spinal cord
What structure is the following?
- Olfactory nerve
- Optic nerve
- Trigeminus n. ?
Dura mater is composed of the following layers:
- Brain meninges
- Spinal Cord Meningeal
Explain the picture:
Conus modullaris
inferior end of spinal cord proper
- ends between L1 ansd L2
Cauda equina
origin of spinal nerves extending inferiorly from conus medullaris
