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HHS Nervous System

Diagnostic, Symptomatic, and Related Terms

Ataxia Lack of muscle coordination in the execution of voluntary movement
aura Premonitory awareness of an approaching physical or mental disorder, peculiar sensation that precedes seizures
Autism Developmental disorder characterized by extreme withdrawal and an abnormal absorption in fantasy
Closed head trauma Injury to the head in which the dura mater remains intact and brain tissue is not exposed
Coma Abnormally deep unconsciousness with absence of voluntary response to stimuli
concussion Injury to the brain, occasionally with transient loss of consciousness as a result of injury or trauma to the head
convulsion Any sudden and violent contraction of one or more muscles
dementia Broad Term that refers to cognitive deficit, including memory impairment
dyslexia Inability to learn and process written language despite adequate intelligence, sensory ability and exposure
lethargy Abnormal inactivity or lack of response to normal stimuli, sluggish
Cerebral Palsy Type of paralysis that affects movement and body position and, sometimes, speech and learning ability
Paralysis Loss of voluntary motion
Hemiplegia paralysis of one side of the body
Paraplegia paralysis of both lower limbs
Quadriplegia paralysis of both arms and legs
sciatica Severe pain in the leg along the course of the sciatic nerve felt at the base of the spine and down the thigh radiating down the leg, due to compressed nerve
Syncope Temporary loss of consciousness due to the sudden decline of blood flow to the brain
Lumbar Puncture Needle puncture of the spinal cavity to extract spinal fluid for diagnostic purposes or to introduce anesthetic agents into the spinal canal, or remove fluid
Cerebrospinal Fluid Analysis (CSF) Series of chemical, microscopic, and microbial tests used to diagnose disorders of the CNS, including viral and bacterial infections
Angiography Radiography of the blood vessels after introduction of a contrast medium
Cryosurgery Technique that exposes abnormal tissue to extreme cold to destroy it