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Central Nervous System
Terminology pertaining to the CNS
26
Veterinary Medicine
Professional
11/21/2010

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Term
analgesia
Definition
absence of pain perception
Term
ataxia
Definition
in coordination, loss of the sense of motion or of the position of the body or limbs in space
Term
clonus
Definition
spasm in which rigidity and relaxation succeed one another
Term
coma
Definition
complete unresponsiveness to repeated noxious stimulation
Term
dysmetria
Definition
inability to regulate the rate, range and force of movement(often cerebellar lesion)
Term
dysphonia
Definition
difficulty in vocalizing
Term
head tilt
Definition
a posture in which the head is carried on an angle to the normal plane, usually a clinical sign of vestibular lesion
Term
hemi
Definition
affecting the limbs on one side of the body
Term
hyperesthesia
Definition
a state of abnormally increased sensitivity to stimuli; hypersensitivity
Term
hypermetria
Definition
excessive flexion of the limb during movement causing the limb to be lifted higher than normal
Term
hyperreflexia
Definition
exaggeration of the reflexes, hyperactive reflexes
Term
hypoflexia
Definition
decreased or diminshed reflexes
Term
hypotonia
Definition
abnormally decreased tone or strength
Term
ictus
Definition
the period of a seizure
Term
intention tremor
Definition
a form of dysmetria involving the head
Term
menace response
Definition
closure of the eyelids in response to a threatening gesture; lesions affecting the crainal nerves II and VII as well as the facial and cerebellum may result in the loss of this resonse
Term
nystagmus
Definition
an involuntary rhythmic movement of the eyeball which may be horizontal, vertical, rotary or mixed
Term
opisthotonus
Definition
a form of spasm in which the head is bend backward and body bowed forwards "star-gazing"
Term
para
Definition
affecting the pelvic limbs
Term
plegia
Definition
complete loss of voluntary movement
Term
pareisis
Definition
weakness or incomplete paralysis
Term
pupillary light reflex
Definition
the constriction of both or ipsilateral and contralateral pupils when a bright light is directed at the pupil. Involves cranial nerve II and cranial nerve III
Term
Seizure
Definition
a brain disorder expressed as a paroxysmal cerebral dysrhythmia, a paroxysmal disturbance of brain function that has a sudden onset, ceases spontaneously and has a tendency to recur. Phenomena observed in a seizure include: loss or drangement of consciousness, excessive or decreased voluntary muscle tone or movement, visceral muscle activity and altered behaviour
Term
spasticity
Definition
greater than normal muscle tone
Term
syncope
Definition
breif period of unconscioussness caused by reversible disturbances in cerebral function usually due to decrease in cerebral blood flow
Term
tetra
Definition
affecting both the oelvic and thoracic limbs
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