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43 Cards in this Set
- Front
- Back
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- 3% of total body weight - one of the smallest and complex of the body systems |
Nervous System |
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Structures of the Nervous System |
- brain - cranial nerve - spinal cord - spinal nerve - ganglia - enteric plexuses - skin receptors |
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Functions of the Nervous System |
- Sensory - Integrative - Motor |
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Division of the Nervous System |
- Central Nervous System (CNS) - Peripheral Nervous System (PNS) |
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Central Nervous System contains |
brain and spinal cord |
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Peripheral Nervous System contains |
- somatic nervous system - autonomic nervous system - enteric nervous system |
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Motor part division of Autonomic Nervous System |
- sympathetic - parasympathetic |
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Excitatory |
sympathetic |
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Inhibitory |
parasympathetic |
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"brain of the gut" |
Enteric Nervous System |
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Two types of cell in the Nervous Tissue |
- Neurons - Neuroglia |
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- functional unit of the Nervous System - possesses electrical excitability |
Neuron |
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Parts of the Neuron |
- cell body - dendrites - axons |
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CNS of Neuroglia |
- astrocytes - oligodendrocytes - microglia - ependymal cells |
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PNS of Neuroglia |
- Schwann cells - Satellite cells |
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myelinated axons |
White Matter |
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- neuronal cell bodies - unmyelinated axons - axon terminals - Neuroglia |
Gray Matter |
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Wieght of the Brain (Adults) |
1300 g |
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Brain consists of how many Neurons |
100 billion neurons |
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Brain consists of how many Neuroglia |
10-50 trillion neuroglia |
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continuation of the spinal cord; between the spinal cord and diencephalon |
Brain Stem |
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Brain Stem consists of : |
- medulla oblongata - pons - midbrain |
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second largest part of the brain |
Cerebellum |
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gives rise to the thalamus, hypothalamus, and epithalamus |
Diencephalon |
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largest part of the brain |
Cerebrum |
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protective covering of the brain |
Cranium |
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The Cranial Meninges are |
- Dura Mater - Arachnoid Mater - Pia Mater |
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- Clear Fluid - Absorbs shock and protects the brain and spinal cord - Circulates through cavities in the brain and spinal cord and also in the subarachnoid space |
Cerebrospinal Fluid |
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Cerebrum contains |
- Cerebral Hemisphere - Gyri - Fissures - Sulci - Corpus Callosum |
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- a.k.a Convolusions - Folds of the Cerebrum |
Gyri or Gyrus |
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Lobes of Cerebrum |
- Frontal - Parietal - Temporal - Occipital - Insula |
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Primary visual area |
Occipital Lobe |
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Primary auditory area & olfactory area |
Temporal Lobe |
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Primary motor area |
Precentral Gyrus |
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Broca's speech area |
Left Cerebral Hemisphere |
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- Help initiate and terminate movements, suppress unwanted movements and regulate muscle tone - Three nuclei deep within each cerebral hemisphere |
Basal Ganglia |
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- governs emotional aspects of behavior - also involved in olfaction and memory |
Limbic System |
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lobes in the cerebellum that initiates equilibrium and balance |
Flocculonodular Lobe |
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major relay station for most sensory impulses |
Thalamus |
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- controls ANS - production of hormones - regulation of emotional and behavioral patterns, eating and dringking, body temperature and circardian rhythm - seat of emotions |
Hypothalamus |
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- small region superior to the thalamus - consists of pineal gland |
Epithalamus |
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How many pairs of Cranial Nerves |
12 pairs |
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What are the Cranial Nerve pairs |
olfactory optic occulomotor trochlea trigeminal abducens facial vestibulococchlear glossopharyngeal vagus accessory hypoglossal |
