Demetrius

Cavities inside the skull correct answer: Anterior/middle/posterior fossa Cranial bones correct answer: Frontal, occipital, sphenoid, ethmoid (unpaired). Parietal & temporal (paired). Mental protuberance correct answer: chin bone MCA supply of the cerebral cortex correct answer: Hand + face/mouth/auditory Cranial nerves correct answer: -12 pairs (Mixed fibers: sensory/motor/both). -Emerge @ irregular intervals from the brain. -Nuclei displacement: Motor = medial Sensory = lat...

What is the maximum allowable chassis leakage current? a) 10 mA b) 20 mA c) 0.1 mA d) 10 mA correct answer: C What is the maximum allowable leakage current from the isolated amplifier inputs through the patient leads? a) 10 uA b) 100 uA c) 1 mA d) 10 mA correct answer: A What is the machine that measures current leakage? a) Ammeter b) Ohmmeter c) Voltmeter d) Photometer correct answer: A What is the color code for ground in an AC Power line? a) Red b) Green c) Black d...

You record a spinal potentialto: correct answer: Establish an Action potential (AP) What drugs would you use for language mapping? correct answer: Fentanyl D waves are recorded form which of the following electrodes? correct answer: Epidural electrodes over the spinal cord. Horizontal Dipole: correct answer: P14 What nerve roots are being monitored using the Peroneus longus muscle? correct answer: L5-S2 Which is the main reason for measuring impedances of all electrodes? corr...

During a median nerve preoperative study, a patient has discomfort at the wrist. Stimulation electrodes are 10 mm gold disk, stimulus intensity is 20 mA, and stimulus duration is 100 μsec. Which of the following would most likely reduce the patient's discomfort while maintaining adequate stimulation? correct answer: Decrease number of repetitions What is not an advantage of epidural recordings? correct answer: Absence of significant artifact The stimulation rate is determined by the co...

In BAEP's, cochlear nucleus lesion causes? correct answer: Increased III-V, increased I-V Which modality is most useful in monitoring the integrity of the corticospinal tracts during resection of an intramedullary spinal cord tumor? correct answer: D-Waves The stimulus used in a brainstem auditory evoked potential study is a click with a peak acoustic power in the range of correct answer: 2000 to 4000Hz Which of the following tibial nerve responses is not a near field response? corr...

ANASTAMOSIS? correct answer: -CONNECTION or opening BETWEEN two things (especially cavities or passages) that are normally diverging or branching, such as between blood vessels. -COMMUNICATION BETWEEN ARTERIES What causes the most airborne bacteria in OR? a. blood on gown b. blood spill c. skin shed d. patient vent correct answer: c. skin shed Nerve that innervates 4th and 5th fingers? correct answer: Ulnar Nerve Problem with Bilateral Synchronus Stim? correct answer: Can mas...

Ipsilateral cranial nerve deficits combined with contralateral motor deficits indicate what site of lesion? A- Cortex B- Cauda equina C- Brainstem D- Spinal cord correct answer: C Median Nerve A- MCA B- PCA C- AICA D- ACA correct answer: A The layers of protective tissue which surround the central nervous system are called: A- Ventricles B- Cerebrospinal fluidd C- Skull D- Meninges correct answer: D The interconnecting blood vessels at the base of the brain make up: A- C...

Resting membrane potential is created by differences between the inside and outside of the cell in ion concentrations of 1. K+ 2. K+ and Ca++ 3. K+, Na+ and Cl- 4. Na+, Ca++ and Cl- correct answer: K+, Na+, and Cl- Excitation of the postsynaptic neuron is caused by the neurotransmitter 1. gamma amino butyric acid 2. glycine 3. para amino butyric acid 4. glutamate correct answer: Glutamate Wave III of the BAER is generated by the 1. superior olivary complex 2. inferior col...

Which of the following are most likely to cause airborne contamination in an operating room? A- ventilation devices B- Kerrison particles C- dust particles D- bloodborne pathogens correct answer: C- dust particles Stimulus artifact during SSEPs can be decreased by A- keeping the instrument away from florescent lights and video monitors B- separating stimulating cables from cables of other equipment C- lowering the impedances of ground and stimulating electrodes D- using enough mu...

When should you use SSEPs? correct answer: Use SSEP's for every case Where do you stimulate for UE SSEPs? correct answer: Ulnar Nerve - any surgery below the C4 level Median Nerve - any surgery above the C4 level Where do you stimulate for LE SSEPs? correct answer: Posterior Tibial Nerve at the ankle Pop Fossa - if severely diabetic or hypertensive Peroneal - if the patient is amputated below the knee N20 correct answer: N20 - Contralateral (to stimulation) post central gy...

the artery of adamkiewicz is correct answer: a major feeder vessle to the spinal cord, supplies from the anterior spinal artery, supplies 2/3 of blood to lower body, at T10 a stroke in which artery would specifically affect the PTN cortical SEP correct answer: the anterior cerebral artery trancranial motor evoked potentials transmit primarily through which spinal cord tract? correct answer: the lateral corticospinal tract PTN evoked potentials transmit primarily through which spinal ...

Which of the following is a clinical indication of a lower motor neuron lesion? correct answer: Fasciculation A stroke associated with a carotid endarterectomy will most likely occur: correct answer: After cross-clamping Troubleshooting in the operating room is facilitated by correct answer: viewing the raw signal input. Which TcMEP wave is MOST affected by a bolus of 30 mg rocuronium? correct answer: I-Wave During a posterior cervical fusion for spinal stenosis, a global shift i...

Which of the following is least likely to cause electrical interference in the operating room? correct answer: The pneumatic drill If the monitoring instrument develops an inability to average, steps to take would include all the following except:? correct answer: Consult with the anesthesiologist anesthesia changes Lying between the adjacent surfaces of the vertebral bodies and bonding them together, are the: ? correct answer: Intervertebral discs The dorsal column pathways synapse ...

Tibial Near Field Response correct answer: P37, LP Tibial Far Field Response correct answer: N34, P31 Agnosia correct answer: Loss of ability to recognize objects,Shapes,Persons,Sounds or Smells. While the specific sense is not defective nor is there any significant memory loss. Median/Ulnar Response Near Field correct answer: N20, N13, EP Median/Ulnar Response Far Field correct answer: N18, P14 Apraxia correct answer: Is a form of motor (Body) agnosia. Involving the nurolog...

According to ACNS Guidelines, what is the minimum number of simultaneous recording channels recommended for performing clinical EEG ? correct answer: 16 What ancillary equipment is necessary to present an external stimulus during the EEG recording? correct answer: Device to deliver photic flash stimuli According to the ACNS Guideline, digital equipment should be used for recording & data storage. correct answer: True An Acceptable Sensitivity Setting should yield an acceptable range ...

Negative polarity correct answer: Triphasic waves Bancauds Phenomenon, alpha squeak and paradoxical alpha all have to do with correct answer: a reaction of the background brain abscess correct answer: focal polymorphic delta activity A wavefrom of .5 hz can be best enhanced with a filter of correct answer: LF .3hz 2016 ACNS guidelines reccomends a min horizontal resolution of correct answer: 16 bits Rolandic Gyrus correct answer: Frontal/ Parietal lobes The waveform morph...

According to the Adult ACNS EEG terminology, a pattern that has at least three independent lateralized patterns with at least one in each hemisphere is A. multifocal B. lateralized C. bilateral independent D. focal correct answer: multifocal According to the Adult ACNS EEG term, a pattern can qualify as rhythmic or periodic as long as it continues for at least how many cycles? A. 4 B. 8 C. 6 D. 3 correct answer: 6 According to the Adult ACNS EEG term, a pattern that is bilate...

Repeating ECI testing in pediatrics and neonates should be done _____ apart correct answer: At least 24 hours Repeat ECI for adults should be at least _____ apart correct answer: 6 Hours During Calibrations the recorded signals should be measured and be within _____ of each other correct answer: +/- 5% Which electrode should be used as the system reference? correct answer: An additional electrode NOT included in the 10/10 or 10/20 systems Why is it important to perform eye open a...

Documentation of the patient's postmenstrual age correct answer: (PMA ¼ gestational age, measured from the time of the last menstrual period 1 chronological age) at the time of recording •The LMP occurs approximately 2 weeks before conception.). correct answer: a)Term ¼ 37 up to 44 weeks of PMA b)Preterm ¼ less than 37 weeks of PMA c)Post term ¼ 44 to 48 weeks of PMA Documentation of neuroactive medications at the time of recording. This includes correct answer: sedatives, hypn...

ECochG consistes of what 3 components? correct answer: 1. cochlear microphonics 2. summating potential (SP) 3. auditory nerve AP Normal latency of "short-latency auditory EPs" (BAER and ECochG) correct answer: Within 10-15msec of stimulus Cochlear microphonics and summating potential are receptor potentials of what? correct answer: Cochlear hair cells What does vertex-negative/positive truly refer to? correct answer: Positivity or negativity of one electrode at the vertex relati...