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two main divisions of the nervous system
- central nervous system - brain and spinal cord
- peripheral (edge) nervous system - cranial and spinal nerves
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neuron
building block of the nervous system
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neuron consist of...
- cell body
- nerve processes(fibers)
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nerve
bundle of neural process outside cns
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bundle of neural processes outside cns
nerve
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synapse
junction between 2 neurons/1 neuron and target organ
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innervation
supply of nerves to an organ or tissue
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supply of nerves to a organ or tissue
innervation
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accumulation of neuron cell bodies outside the cns-junction point for nerve impulses
ganglion
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sensory nerve; carries impulses into brain
afferent nerve
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motor nerve; carries impulses away from the brain
efferent nerves
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part of peripheral nervous system; involuntary
autonomic nervous system
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T/F: all autonomic nerves are motor nerves
true
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2 parts of the autonomic system
- sympathetic
- parasympathetic
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"fight or flight" - spinal nerves
sympathetic
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rest and digest - primarily cranial nerves
parasympathetic
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T/F: crainial nerves can be sensory, motor, or both
true
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how many crainal nerves are there
12 pairs
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olfactory nerve-sensory-carries sense of smell
C-I
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OPTIC NERVE- sensory carries sense of sight
CII
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oculomotor nerve-motor only supplies most of the muscle of the eyeball
C-III
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TROCHLEAR NERVE-MOTOR ONLY-SUPPLIES "ONE" MUSCLE OF THE EYEBALL
C-IV
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TRIGEMINAL NERVE-IS BOTH SENSORY AND MOTOR-PRIMARLY SENSORY
C-V
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MOST IMPORTANT NERVE IN DENTISTRY
C-V TRIGEMINAL NERVE
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SENSORY NERVE FROM SKIN OF FACE AND HEAD, TEETH, ORAL CAVITY, AND ANTERIOR 2/3 OF THE TONGUE-
MOTOR NERVE TO MUSCLE OF MASTICATION
C-V TRIGEMINAL NERVE
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NERVES THAT COME OFF THE BOTTOM OF THE BRAIN
CRANIAL NERVES
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4 CRANIAL NERVES THAT ARE BOTH SENSORY AND MOTOR
- C-V TRIGEMINAL NERVE
- C-VII FACIAL NERVE
- C-IX GLOSSOPHARYNGEAL NERVE
- C-X VAGUS NERVE
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SENSORY NERVE ONLY-CARRIES SENSES OF HEARING AND BALANCE
C-VIII AUDITORY NERVE
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BOTH SENSORY AND MOTOR-
SENSORY: SKIN AROUND EAR AND TASTE AND PAIN ON POSTERIOR 1/3 OF THE TONGUE
MOTOR: PAROTID GLAND AND STYLOPHARYNGEOUS MUSCLE
C-IX GLOSSOPHARYNGEAL NERVE
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BOTH SENSORY AND MOTOR
SENSORY: SKIN AROUND EAR AND TASTE FROM EPIGLOTTIS
MOTOR: MUSCLES OF PALATE, PHARYNX AND LARYNX-ORGANS OF THORAX AND ABDOMEN
C-X VAGUS NERVE
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MOTOR NERVE ONLY-SUPPLIES THE MUSCLES OF THE NECK, SOFT PALATE,AND PHARYNX
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