Terms in this set (102)
silver-silver chloride electrode, The best metals for clinical EEG recordings are
platinum or gold
subdermal Which electrodes do NOT record directly from the brain?
Opposition to alternating current What is NOT related to measuring electrodes resistance?
flow
A patient can become the pathway for least resistance and
the patient has an indwelling heart
catheter therefore electrically susceptible to shock when?
mainly horizontal eye movements Eye leads placed at the outer canthus of each eye will record what?
60 hz interference What is NOT a physiological artifact?
intravenous drip What is NOT a source of 60hz interference?
10cm When recording for ECI, the interelectrode distance should be at least?
When recording for ECI, interelectrode impedance should be at least
100, 10,000
ohms, but
less than ohms.
When recording for ECI, it is recommended that the sensitivity be uv/mm
2, 1.0, 30
and the
low filter should not be higher than______Hz for at least mins of
recording.
frontal and parietal lobes The central sulcus(fissure of Rolando)demarcates the _.
respiration and regulation of the Two important functions of the medulla are____.
heart rate
contralateral lower extremity Thrombosis of the anterior cerebral artery is most likely to cause _.
weakness
left side paralysis, primarily of Thrombosis of the right middle cerebral artery would most likely
the face and arm cause___.
opening between lateral The foramen of Munro is the _.
ventricles and third ventricle of
the brain
An action potential is an immediate result of which of the
depolarization
following changes in the neural membrane?
50-100 mV with the inside of The resting potential of a neuron is ?
the cell more negative than
the outside
the sensitivity should be If a seizure discharge causes the wave forms in the channels to
decreased (from 7 uv/mm to 10, square off and run into each other, what should be done?
, 15 uV/mm)
medulloblastoma MALIGNANT TUMOR PRIMARILY SEEN IN CHILDREN
Which infection is most likely to produce headaches, fever, nuchal
Meningitis
rigidity, coma and death?
Without diabetic treatment, this hereditary disease may cause
Phenylketonuria (PKU)
mental retardation and infantile spasms.
third Herniation of the uncus results in compression of which cranial nerve?
von Rechlinghausen disease Cafe-au-lait spots and neurofibromas are associated with _.
Parkinsonism Substantia nigra is affected in what disorder?
one million bytes A megabyte of memory is approximately equal to ___.
difficulty moving the right half of A patient complaining of right hemiplegia will have ___.
the body
comprehending the meaning of A patient with sensory aphasia will have difficulty____.
words or phrases
What term is used to describe brainstem injury in a patient who
Locked-in syndrome (LIS)
is completely paralyzed except for vertical eye movements?
Cerebral Spinal Fluid (CSF) The term "xanthochromic" is usually used in reference to ___.
involuntary twitching of muscle Fasciculation refers to ___.
fiber
patients degree of consciousness The Glasgow scale is used to determine ___.
A combination of electronic componets designed to increase the
amplifier
power, voltage or current of a signal?