NERVOUS SYSTEM Lecture 1. OVERVIEW and NEUROHISTOLOGY. ANATOMICAL ORGANIZATION of the NERVOUS SYSTEM. Central Nervous System (CNS). Definition: Unpaired, bilaterally symmetrical structures extending along the longitudinal axis of the midsagittal plane of the body.
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Unpaired, bilaterally symmetrical structures extending along the longitudinal axis of the midsagittal plane of the body.
Structures arising directly from the neural tube.
Made up of transmission pathways carrying information between the CNS and external/internal environments.
Carry information to the CNS.
Carry information from the CNS.
Cranial nerves (12 pairs).
Spinal nerves (31 pairs).
Also called thoracolumbar.
Also called craniosacral.
Ribosomes (=Nissl substance)
Made up of Schwann cells.
Myelin is formed by Schwann cells.
Transports vesicles from cell body to end of axon.
Transports vesicles from end of axon toward cell body.
Bundle of fibers in the PNS.
Bundle of fibers in the CNS.
Tract in the CNS that crosses from one side to the other.
Aggregation of dendrites and nerve cell bodies in the CNS.
Aggregation of dendrites and nerve cell bodies in the PNS.
Areas of myelinated axons.
Areas of unmyelinated axons, cell bodies, and dendrites.
With synaptic vesicles filled with neurotransmitters.
With receptors for neurotransmitters.