Download Today`s Objectives Describe the basic structure of a nerve. Identify

Today’s Objectives
1. Describe the basic structure of a nerve.
2. Identify the twelve cranial nerves and the purpose of each.
3. Explain the organization of the spinal nerves, the dorsal and ventral rami, and the plexuses.
4. Describe the location, structure, and function of ganglions.
5. Differentiate between the functions of the sympathetic and parasympathetic nervous systems.
Lesson 4: Functional Anatomy of the Peripheral Nervous System

The _____________________ nervous system transmits __________________________ to the CNS and carries
_____________________________ from the CNS.

Nerve Structure
o
Each _________________ consists of a __________________________ of axons and
_____________________________ supplying __________________________ vessels.
o
Each ____________________ is covered by the ___________________________________
o
Groups of these__________________ are __________________________ into fascicles surrounded by a
protective ________________________________.
o
Groups of ______________________ and blood vessels are _________________________ in a tough
__________________________.
Cranial Nerves
•
_________________________ pairs of cranial nerves
•
Send ______________________ to and from the ____________________ and ______________________ sides of
the brain.
•
Some of the nerves only contain __________________________ (sensory) fibers, and some only contain
____________________________(motor) fibers, and others are _____________________________.
Spinal Nerves and Nerve Plexuses
•
__________ pairs of spinal nerves _______________________ out from the left and right sides of the spinal cord.
•
The spinal nerve cell ___________________ are located within the _______________ matter of the spinal cord.
•
_____________________ root and ventral root
o
Both nerves ____________________ to form the left and right spinal nerves that _______________ at each
________________________ level.
•
dorsal _____________________ and ventral ramus
•
__________________ spinal nerve is only about ____________-_____________ of an inch.
•
Each _____________________ branches out into the ____________________ and ventral rami.
•
All of the rami are ___________________ nerves carrying both ___________________ and efferent.
•
Dorsal rami _________________ motor impulses to the _____________________ trunk and relay
______________________impulses from the skin of the ________________________.
•
•
Plexuses
•
•
Ventral rami communicate with the___________________________ and lateral trunk.
Complex ____________________________________ of nerves.
autonomic nervous system
•
One of two divisions of the __________________________ nervous system.
•
Autonomic nervous system is ________________________ by the CNS to activate the _________________,
_______________________ muscles, and glands.
•
Within the autonomic system, ________________ nerves connect the CNS to the organs supplied.
•
sympathetic nerves
•
___________________ the _____________-or-______________ action response
•
Stimulates the___________________ gland to produce _____________________.
•
_________________________ neurons in the sympathetic system ________________________
_____________________________ to stimulate postganglionic neurons.
•
•
Postganglionic neurons release the ____________________________ norepinephrine.
parasympathetic nerves
•
________________________ all of the ____________________________ day-in and day-out functions of
the _________________________, respiratory, and ___________________________ systems.
•
Sometimes called the __________________________ or _______________________ action
•
Produces a _______________________ effect that returns the ____________________ to a
_______________________ state.