Chapter 12: The Nervous System Professor Fowler

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Chapter 12: The Nervous System Professor Fowler Medical Terminology Chapter 12: The Nervous System Professor Fowler

WORDS TO KNOW Cephal/o: head Encephal/o: brain Gli/o: glue Myel/o: spinal cord Neur/o: nerve Phas/o: speech -algesia: pain -esthesia: feeling, sensation -paresis: weakness -phasia: speech -plegia: paralysis

Vocabulary Anorexia Nervosa: characterized by periods of not eating Coma: deep unconsciousness Convulsion: seizure Bulimia Nervosa: characterized by periods of binging and purging Paralysis: inability to move Syncope: fainting Aura: sensation before an event Dementia: loss of intelect Alzheimer’s disease: abnormal connections in brain Conscious: alert & awake Unconscious: state of unaware

Abbreviations CNS: central nervous system CSF: cerebrospinal fluid CVA: cerebrovascular accident HA: headache MS: multiple sclerosis PNS: peripheral nervous system TIA: transient ischemic attack

The Nervous System Purpose: coordinate all activities of the body Receives sensory info to adjust the activity to match needs of the body Subdivided into 2 parts CNS PNS

Two Divisions of Nervous System Central Nervous System Brain and spinal cord Sensory info from PNS to CNS for processing Peripheral Nervous System Cranial and spinal nerves Sensory info sent to CNS for processing and motor info sent from CNS to PNS

Central Nervous System Tract: bundles of nerve fibers Brain Cerebrum Gyri: elevated portions Sulci: valley like areas Lobes Frontal: motor function Parietal: sensory receptors Occipital: vision Temporal: hearing and smell Cerebellum: voluntary body movements Diencephalon Thalamus Hypothalamus Brain Stem Midbrain Pons Medulla oblongata

Central Nervous System Spinal Cord Acsending tract: to brain Descending tract: from brain Meninges Dura mater: hard mother Arachnoid layer: spider Pia mater: soft mother

Peripheral Nervous System Cranial nerves (18) Spinal nerves (19) Tracts Ascending S – sensory A – afferent Descending M – motor E - efferent Autonomic Sympathetic: fight or flight Parasympathetic: rest and digest Somatic

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