NS Vocab.txt

collection of cell bodies in the CNS

a bundle of axons connecting nuclei (distant or neighboring)

cell bodies

interconnecting fiber tract systems

pia, arachnoid and dura maters

innermost meningeal layer, delicate and transparent

central meningeal layer

thick, tough, outer meningeal layer

contains CSF that pushes the arachnoid against the dura in life

space separating the dura and vertebral canal; contains fat, the roots of spinal nerves, and the internal vertebral plexus of veins

bundles of nerve fibers, their connective tissue coverings and blood vessels (vasa nervorum); may be either cranial (CN) or spinal

an axon, its neurolemma and its endoneurium

cell membranes of Schwann cells that surround the axon; these may be myelinated or unmyelinated

innermost of three connective tissue sheaths surrounding peripheral nerves

layer of dense connective tissue that encloses a fascicle, protecting it

thick connective tissue that encloses a bundle of fascicles and includes fatty tissues, blood vessels and lymphatics

Provides general sensory and motor innervaton to all parts of the body except smooth muscle, glands and the viscera in the body cavities.

collection of nerve cell bodies outside the CNS

• Sensory relays in the CNS, from which the dorsal rootlets of the general sensory nerves (somatic) emerge.
• (Cell bodies are located in the dorsal root ganglion.)

Cell bodies of motor neurons (somatic)

Contains the cell bodies of sensory nerves (somatic)

• Innervate the intrinsic (deep) back muscles and other posterior body wall tissues
• *Do not* innervate extrinsic back muscles
• NOT found in limbs.

• Innervate the lateral and anterior body wall and the extremities.
• They are the ONLY nerves to the extremities

tapering termination of spinal cord at L1

extension of the pia mater that stretches from the conus medullaris to the coccyx and anchors the spinal cord inferiorly

small, toothlike extension of the pia mater that anchors the spinal cord to the vertebral column laterally

• Helps facilitate venous return when necessary
• Route for metastases from prostate to brain

penetrate the subarachnoid space below L1/L2

anesthesia in the epidural space blocks the roots; usually sacral

• 7
• 12
• 5
• 4-5
• 3-4