Tibial far field response Study guides, Class notes & Summaries

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- - 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 - Answer- Glutamate Wave III of the BAER is generated by the 1. superior olivary complex 2. inferior colliculus 3. la...

If you have high frequency noise in a BAEP: A100/100 pts Change HFF from 3000 to 1500 Hz Change HFF to 200 Hz Change LFF to 150 Hz Change LFF to 30 Hz - Answer- Change HFF from 3000 to 1500 Hz To dissect a vestibular schwannoma, which surgical approach usually sacrifices hearing? suboccipital retrosigmoid middle cranial fossa translabyrinthine - Answer- translabyrinthine According to current OSHA standards, needle electrodes should be reused whenever possible not be soaked i...

in which of the following evoked potentials is the scalp position of recording electrodes most critical? Lower extremitity SSEP if an evoked potential has a voltage of 10 uV and the associated noise has a voltage of 50uV, waht is the signal to noise ration after 100 averages responses? 2:1 To display median nerve SSEP response as an upward deflection, which of the following must be known? waveform polarity and polarity convention of the amplifier inputs If an amplifier is...

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? Decrease number of repetitions What is not an advantage of epidural recordings? Absence of significant artifact The stimulation rate is determined by the analysis time Soma...

Forward movement of one of the lower lumbar vertebra on the vertebra below it, or upon the sacrum - Answer- Spondylolisthesis is: 1 Forward movement of one of the lower lumbar vertebrae on the vertebrae below it, or upon the sacrum 2 Ankylosis of the vertebrae 3 Neurofibromatosis 4 Deterioration of the spinal cord gray matter which is replaced by a large cyst Sciatic nerve - Answer- The common peroneal nerve arises at the superior angle of the popliteal fossa from the: 1 Superior tibial ...

Diabetes Mellitus - Answer- Peripheral Neuropathy To display median nerve SSEP response as an upward deflection, which of the following must be known? - Answer- Waveform polarity and polarity convention of the amplifier inputs The facial nerve enervates all of the following structures except: - Answer- Tensor veli palatini muscle For preoperative posterior tibial somatosensory evoked potentials, which of the following would be the best ipsilateral location for the ground electrode? - An...

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- - 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 - ANSWER-Glutamate Wave III of the BAER is generated by the 1. superior olivary complex 2. inferior colliculus 3. late...

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 Cl4. Na+, Ca++ and Cl- - Answer K+, Na+, and ClExcitation of the postsynaptic neuron is caused by the neurotransmitter 1. gamma amino butyric acid 2. glycine 3. para amino butyric acid 4. glutamate - Answer Glutamate Wave III of the BAER is generated by the 1. superior olivary complex 2. inferior colliculus 3. lateral lemniscus ...

Coulomb's Law - Answer- The force exerted between two charges is inversely proportional to the square of the distance between them. F=1/(distance)^2 Voltage - Answer- an electromotive force or potential difference expressed in volts. Current - Answer- Movement of charge (Amps) Ohm's Law - Answer- V=IR Resistance is opposition to ____ Impedance is opposition to _____ - Answer- Resistance is opposition to DC flow Impedence is opposition to AC flow Resistors in Series (Voltage ...

Scalp position of electrodes most critical? Lower extremity SSEP evoked potential has a voltage of 10 uV and the associated noise has a voltage of 50 uV, what is the signal-to-noise ratio after 100 averaged responses? 2:1 To display median nerve SSEP response as an upward deflection, which of the following must be known? Waveform polarity and polarity convention of the amplifier inputs If an amplifier is rated at having 120dB common mode rejection ratio, which of the foll...