Chapter 8 - The Nervous System Flashcards
Cranial Nerve I
olfactory - involved in sense of smell (sensory)
Cranial Nerve II
optic - involved in sense of vision (sensory)
Cranial Nerve III
oculomotor - involved in movement of eyes, controlling both the exterior and interior parts (motor)
Cranial Nerve IV
trochlear - involved in muscles that move the eyes (motor)
Cranial Nerve V
trigeminal - involved in eyes, tear glands, scalp, forehead, teeth, gums, lips and muscles of the mouth (sensory and motor)
Cranial Nerve VI
abducens - involved with muscle conditioning (motor)
Cranial Nerve VII
facial - involved with taste, facial expressions, tear glands, and salivary glands (sensory and motor)
Cranial Nerve VIII
vestibulocochlear - involved in hearing and equilibrium (sensory)
Cranial Nerve IX
glossopharyngeal - involved in pharynx, tonsils, tongue, and carotid arteries, stimulates salivary glands (sensory and motor)
Cranial Nerve X
vagus - involved in speech, swallowing, heart muscles, smooth muscles and certain glands (sensory and motor)
Cranial Nerve XI
accessory (cranial and spinal) - involved in muscles of the soft palate, pharynx, larynx, neck and back (motor)
Cranial Nerve XII
hypoglossal - involved in muscles that move the tongue (motor)
acetylcholine
chemical neurotransmitter that stimulates cells
afferent neuron (sensory)
neuron that carries information from the sensory receptyors to the CNS
arachnoid
middle layer of meninges
astrocyte, astroglia
a type of neuroglia that maintains nutrient and chemical levels in neurons
autonomic nervous system
part of the peripherial nervous system that carries impulses from tyhe CNS to glands, smooth muscels, cardiac muscles, and various membranes
axon
part of a nerve cell that conducts nerve impulses away from the cell body
basal ganglia
large masses of gray matter within the cerebrum
brain
body organ responsible for controlling the body’s functions and interactions with outside stimuli
brainstem
one of the four major divisions of the brain; division that controls cetain herat, lung and visual functions
cell body
part of a nerve cell that has branches or fivers that reach out to send or receive impulses
CNS; central nervous system
the brain and spinal cord
cerebellum from Latin little brain
one of the four major divisions of the brain; division that coordinates musculoskeletal movement
cerebral cortex
outer portion fo the cerebrum
cerebrum
one of the four major divisions of the brain; division that is involved with emotions, memory, conscious thought, moral behavior, sensory interpretations, and certain bodily movement
conductivity
ability to transmit a signal
convolutions; gyrus
folds in the cerebral cortex; gyri
corpus callosum
bridge of nerve fibers that connects the two hemispheres of the cerebrum
cranial nerves
the 12 pairs of nerves that carry impulses to and from the brain
cranium
bony structure that the brain sits in
dendrite
a thin branching extension of a nerve cell that conducts nerve impulses toward the cell body
diencephalon
one of the four major divisions of the brain; it is the deep portion of the brain contains the thalamus
dura mater
outermost layer of meninges
efferent neuron (motor)
neuron that carries information to the muscles and glands from the CNS
epidural space
area between the pia mater and the bones of the spinal cord
epithalamus
one of the parts of the diencephalon; serves as a sensory relay station
excitability
ability to respond to stimuli
fissure
one of many indentations of the cerebrum; sulcus
frontal lobe
one of the four parts of each hemisphere of the cerebrum; contains voluntary motor movements, emotional expression and moral behavior
hypothalamus
one of the parts of the diencephalon; serves as a sensory relay station
interneuron
neruon that carries and processes sensory information
medulla oblongata
part of the brain stem that regulates heart and lung functions; swallowing, vomiting, coughing and sneezing
meininges
three layers of membranes that cover and protect the brain and spinal cord
microglia
a type of neuroglia that removes debris
midbrain
part of the brainstem involved with visual reflexes
myelin sheath
fatty tissue that covers axons
nerve
bundle of neurons that bear electrical messages to the organs and muscles of the body
nerve cell; neuron
basic cell of the nervous system having three parts: cell body, dendrite, and axon; also called a neuron
nerve impulse
released energy that is received or transmitted by tissue or organs and that usually provokes a response
neurilemma
membranous covering that protects the myelin sheath
neroglia, neroglial cell
cells of the nervous system that does not trasnmit impulses
neurotransmitters
various substances located in tiny sacs at the end of the axon
occipital lobe
one of the four parts of each hemisphere of the cerebrum; controls vision and various forms of expression
oligodendroglia
a type of nerugolia that produces myelin (in the CNS) and helps to support neurons
parasympathetic nervous system
part of the autonomic nervous system that operates when the body is in a normal state (rest and digset)
parietal lobe
one of the four parts of each hemisphere of the cerebrum; controls and interprets the senses and taste
pia mater
innermost layer of meninges
pons
part of the brainstem that controls certain respiratory functions
receptors
tissue or organ that receives nerve impules
somatic nervous sysem
part of the peripherphal nervous system that recevies and processes sensory input from various parts of the body
spinal cord
ropelike tissue that sits inside the vertebral column and from which spinal nerves extend
spinal nerves
any of 31 pairs of nerves that carry messages to and from the spinal cord and the torso and extremities
stimulus
anything that arouses a response
subdural space
area between the dura mater and the pia mater across which the arachnoid runs
sympathetic nervous system
part of the autonomic nervous system that operates when the body is under stres
synapse
space over which nerve impulses jump from one neuron to another
temporal lobe
one of the four parts of each hemisphere of the cerebrum; controls memory, equilibrium, emotion and hearing
terminal end fibers
group of fibers at the end of an axon that passes the impulses leaaving the neuron to the next neuron
thalamus
one of the four parts of the diencephalon; serves as a sensory relay station
ventral thalamus
one of the four parts of the diencephalon; serves as a sensory relay station
ventricle
cavity in the brain for CSF
cerebell(o)
cerebellum
cerebr(o), cerebri
cerebrum
crani(o)
cranium
encephal(o)
brain
gangli(o)
ganglion