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25 Cards in this Set
- Front
- Back
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What parts of the brain form the brain stem? |
Midbrain , Pons ,Medulla |
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Dendrites |
-treelike structure the receive signals from other neurons and then transmit the signals toward the body |
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Axons |
-long extension that transmits signals away from the cell -the myelin sheath,the neurilemma,the nodes of Ranvier |
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Nodes of Ranvier |
-axonal areas not covered by myelin, appear at regular intervals along the myelin |
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Injury to the occipital lobe cause? |
-Cortical blindness |
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Subarachnoid Space |
Between the arachnid layer and pia mater is a space |
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Define the midbrain and it`s functions: |
-Extends from the lower diencephalon to the pons -Relays sensory and motor information -also contains nuclei that function as reflex centers for vision and hearing |
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Define Pons and it`s functions: |
-extends from the midbrain to the medulla oblongata -Composed primarily of tracts that act as a bridge for info traveling to and from several brain structures -important role in regulation of breathing rate and rhythm |
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Define Medulla Oblonogata and it`s function: |
-connects the spinal cord with the pons -acts as a relay for sensory and motor info -important nuclei control heart, blood pressure, and respiration. -also call vital center |
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Ependymal cells |
-Line the inside cavities of the brain and assist in the formation of cerebrospinal |
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Parkinson`s Disease |
-A deficiency of dopamine with the basal nuclei -It is a movement disorder or dyskinesia -Characteristics shaking (tremors) also know as shaking palsy |
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Which lobe of the brain contains the auditory cortex? |
-Temporal Lobe |
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Lumbar Puncture |
-A hollow needle is inserted into the subarachnoid space, between L3 and L4, at about the level of the top of the hip bone. -CSF is withdrawn from the subarachnoid |
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Astrocytes |
-They support the neurons structurally, cover the entire surface of the brain, and help form a protective barrier called the blood-brain barrier -acts as phagocytes and secrete nerve growth factors |
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Blood-brain barrier |
-Helps prevent toxic substance in the blood from the entering the nervous tissue of the brain and spinal cord. |
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Cerebrospinal fluid |
-cushioning fluid that circulates within the subarachnoid space around the brain and spinal cord |
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Dermatone |
-area of the body supplied by a spinal nerve |
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Motor vs sensory |
-motor carries info away -sensory is a collection of neurons that carry info toward CNS |
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What type of tissue conducts a nerve impulse? |
-Neurons |
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Which drug lowers blood pressure by causing vasoconstrict? |
-parasympathetic |
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Broca`a area |
speech |
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Diencephalon |
-second main area of the brain. Beneath the cerebrum and above the brain stem. -Included the thalamus and the hypothalamus |
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Choroid Plexus |
-the CSF is formed within the ventricles of the brain |
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Layers of meninges |
-pia mater -arachnoid -dura mater PAD |
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4 majors areas of the brain |
-cerebrum -diencephalon -brain stem -cerebellum |
