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30 Cards in this Set
- Front
- Back
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gnos/o
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knowledge
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goal of the nervous system
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to monitor changes in the enviorment inside & outside the body, interpet changes & initiate a response in effort to maintain homeostasis.
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Two main groups of the nervous system
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1)central nervous system(CNS)-brain & spinal cord
2)peripheral nervous system(PNS) nerves & sensory receptors. |
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neurons
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impuls conducting cells of nervous tissue receive support from nearby neuroglial cells
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dendrites
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carry impulses toward the cell body and a single axon carries impulses away
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Schwann cells
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provide white-colored protective sheath that is mostly fat covers the axon
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Four parts of the brain
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1)cerebrum-largest most signifigant part
2)cerebellum-(little brian) coordinates muscle responses & manages equilibrium 3)diencephalon-(double brain)the Thalmus & hypothalmus 4)brain stem- includes the medulla, pons & midbrain |
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ventricles
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small spaces in the brains center filled with yellowish fluid known as cerebrospinal fluid(CSF) produced from the blood supply
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how many pairs of spinal nerve are along the lengeth of the spinal cord?
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31
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Ganglia (singular form of ganglion)
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clusters of neuron cell bodies that lie outside the brain & spinal cord
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arachnoid
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middle meninx; surrounds a space filled with CSF;known as the subarachnoid space
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subarachnoid space
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space within the arachnoid which is filled with CSF
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cerebral hemispheres
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right and left portions of the cerebrum, separated by the longitunidal fissure
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cranial nerves
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12 pairs of nerves that unite with the brain
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cerebral cortex
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ourter fringe of the cerebrum and the site of nereve pathway termination and origin in the brain
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ganlia
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clusters of neuron cell bodies that lie outside the CNS
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meninges
(men IN jeez) |
dura meter, arachnoid, and pia mater membrances that surround the brain and spinal cord; the singular form is meninx
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neuroglia
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supportive cells of nervous tissue
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neurtransmitter
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chemical that is released into a synapse from one neuron to cause a change in another neuron
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thalamus
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area in the diencephalon that serves as a relay station of impulses
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hypothalmus
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located just below the thalmus this area in the diencephalon is the center for involuntary functions
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aphasia
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inability to speak
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cephalagia
(seff al AL jee ah) |
a headache or general pain to the head
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dysphasia
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difficulty speaking
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hyperesthesia
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increased sensitivity to stimulation such as touch or pain
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neuralgia
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pain in a nerve
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neurasthenia
(noo ras THEE nee ah) |
a vague condition of body fatigue often associated with depression
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paresthesia
(par ess THEE zee ah) |
abnormal sensation of numbness and tingling without an objective cause
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agnosia
(ahg NOH see ah) |
a loss of the ability to interpret sensory information
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Amyotrophic lateral sclerosis
(ah my oh TROF ik) |
progressive atrophy (loss) of muscle caused by hardening of nervous tissue on the lateral columns of the spinal cord; AKA: Lou Gehrigs Disease after the professional baseball player ABBV: ALS
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