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The Nervous System
Anatomical!
27
Anatomy
Not Applicable
07/15/2015

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Cards

Term
Anatomy of the Nervous System?
Definition
Brain, Spinal Cord, 12 pairs of cranial nerves, 31 pairs of spinal nerves
Term
Neuron
Definition
Nerve Cell
Term
Axon
Definition
Long process of a neuron. axons SENDS the nerve impulse
Term
Dendrite
Definition
Dendrite: Tree like process on the neuron. RECIEVES a nerve impulse
Term
Cell Body
Definition
Main part of the neuron contains the nucleus
Term
Synapse
Definition
Junction between two neurons
Term
Meninges
Definition
3 dense irregular CT sacs surrounding the brain and spinal cord
Term
What're the 3 layers of the Meninges from superficial to deep?
Definition
Dura mater, Arachnoid mater, Pia mater
Term
Spinal Cord
Definition
mass of nerve tissue in the vertebral column
Term
Plexus
Definition
a network of nerves coming out of the spinal column
Term
Myelin sheath
Definition
Covering around an axon that protects and insulates
Term
Neurotransmitter
Definition
Chemical message sent across the synapse
Term
Afferent Neuron
Definition
SENSORY nerve impulse TOWARD the CNS
Term
Efferent Neuron
Definition
MOTOR nerve impulse AWAY from the CNS toward a muscle/gland
Term
Proprioceptor
Definition
located in the middle ear helps maintain equilibruim and judge weight of objects and tells the brain where you are in space
Term
Tendon Organ
Definition
proprioceptor located between muscle and tendon. tells brain if muscle is being over stretched or contracted
Term
What're the four main parts of the brain?
Definition
Cerebrum, Cerebellum, Diancephalon, Brain Stem
Term
Trigeminal Cranial Nerve
Definition
Sensory: Jaws and Eyes
Motor: Chewing and Tears
Term
Facial Cranial Nerve
Definition
Motor/Sensory- optic, nasal, tongue, taste buds
Term
Vagus Cranial Nerve
Definition
Motor/Sensory innervates all internal organs
Term
What is the CNS comprised of?
Definition
Brain and Spinal Cord
Term
What is the function of the CNS?
Definition
Receives, sends, and interprets
Term
What is the PNS comprised of?
Definition
12 pairs of cranial nerves, and 31 pairs of nerves coming out of the spinal cord
Term
Function of the PNS?
Definition
SENDS afferent messages to brain and RECEIVES efferent messages to move body parts
Term
What is a reflex?
Definition
An automatic response that isn't interpreted by the brain
Term
How does massage affect the nervous system?
Definition
Massage activates the PNS thus relaxing muscles, and improving bodily function
Term
Sensory Nerves
Definition
feel sensory input
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