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# EEG Formula Practice

### 2

Question | Answer |
---|---|

S = 7uV/mm, A (D or W) = 15mm | V = 105uV |

S = 7uV/mm, V = 20uV | D (A or W) = 2.85mm |

S = 2uV/mm, A (D or W) = 10uV | V = 20uV |

S = 3uV/mm, A (D or W) = 25mm | V = 75uV |

V = 9mm, PS = 30mm/sec (F = 55Hz) | D = 300msec |

V = 9mm, PS = 30mm/sec (D = 600msecs) | F = 3.33Hz (or mm/sec) |

PS = 15mm/sec, A (D or W) = 3mm | F = 5 uV |

PS = 60mm/sec, A (D or W) = 9mm | F = 6.7 (7) uV |

PS = 30mm/sec, A (D or W) = 15mm | D = 2000msecs |

PS = 60mm/sec, A (D or W) = 15mm | D = 250msec |

A (D or W) = 1mm, V = 15uV | S = 15uV/mm |

S = 15uV/mm, V = 50uV | D (A or W)= 3.33mm |

S = 300uV/mm, V = 50uV | D (A or W) = 1.66mm |

D (A or W) = 50mm, V = 100uV | S = 2uV/mm |

S = 30uV/mm, D (A or W) = 6mm | V = 180uV |

Polarity: -70, -30 | -30, up |

Polarity: -60, +20 | -80, up |

Amplitude: V (+45, +10)___ | 35 uV / 5 uV(S)___= 7uV/mm |

Adding Negatives: -7 -(-3) | -10 (subtracting) |

Adding Negatives: -7 + (-3) | -10 (adding) |

Adding Negatives: -7 - (-3) | -4 |

10/20: 38 (Neo) @20% | 7.6 |

10/20: 38 (Neo) @70% | 22.8 |

10/20: 38 (Neo) @50% | 15.2 |

10/20: 42 @20% | 8.4 |

10/20: 42 @70% | 25.2 |

10/20: 53 @50% | 21.2 |

10/20: 44 @20% | 8.8 |

10/20: 63 @70% | 37.8 |

10/20: 56 @70% | 33.6 |

10/20: 56 @50% | 22.4 |

10/20: 58 @20% | 11.6 |

10/20: 47 @20% | 9.4 |

10/20: 58 @70% | 34.8 |

10/20: 61 @20% | 12.2 |

10/20: 61 @50% | 24.4 |

10/20: 61 @70% | 36.6 |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: +45, +10 | Down, 35 uV, 7 mm |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: -10, -60 | Down, 50 uV, 10 mm |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: +10, -60 | Down, 70 uV, 14 mm |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: +10, +60 | Up, 50 uV, 10 mm |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: -10, +60 | Up, 70 uV, 14 mm |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: +60, +60 | None, 0 uV, 0 mm |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: +60, +90 | Up, 30 uV, 6 mm |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: -15, +10 | Up, 5 uV, 1 mm |

Polarity, Sensitivity & Amplitude - Sensitivity = 5 uV/mm: +70, +30 | Down, 40 uV, 8 mm |

What is the voltage of a calibration signal for 7 uV/mm? | 50 uV. |

What is the deflection of a calibration signal for 7 uV/mm? | 7.1 mm. |

What happens to the output when you change the calibration sensitivity from 7 uV/mm to 10 uV/mm? | Decreases. |

If you change sensitivity from 10 uV/mm to 7 uV/mm, what does it do? | Increases. |

When you decrease the sensitivity to 20 uV/mm, what type of activity may become hard to clearly distinguish? | Low amplitude. |

A sensitivity of 5 uV/mm will produce a deflection of... | 1 mm. |

At 5 uV/mm, how how much voltage is required to obtain a 10 mm deflection? | 50 uV. |

How much voltage does it take for 10 mm of pen deflection at 10 uV/mm? | 100 uV. |

Calculate the amount of chloral hydrate you should give to a 5 year old weighing 20 lbs. | 450 mg. |

What is the maximum dosage of chloral hydrate allowable for a 150 lb adult? | 3,409 mg. |

Ohm's Law: R = | E/I |

Ohm's Law: I = | E/R |

Ohm's Law: E = | IR |

Power / Watts: P = | E2/R |

Power / Watts: P = | I2R |

Power / Watts P = | EI |

FRC - How much of the wave will be seen if the settings are LFF 5 Hz, HFF, 35 Hz sensitivity of 2 Hz? | 55 % |

FRC - How much of the wave will be seen if the settings are LFF 5 Hz, HFF, 35 Hz sensitivity of .5 Hz? | 5 % |

FRC - How much of the wave will be seen if the settings are LFF 5 Hz, HFF, 35 Hz sensitivity of 13 Hz? | 100 % |

FRC - How much of the wave will be seen if the settings are LFF 5 Hz, HFF, 35 Hz sensitivity of 10 Hz? | 100 % |

FRC - How much of the wave will be seen if the settings are LFF 5 Hz, HFF, 35 Hz sensitivity of 50 Hz? | 60 % |

FRC - How much of the wave will be seen if the settings are LFF 5 Hz, HFF, 35 Hz sensitivity of 2 Hz? | 100 % |

1,000,000th of a volt is a... | Microvolt. |

1,000th of a volt is a... | Millivolt. |

1,000 volts is a... | Kilovolt. |

Ohm's Law - 200 uV, 50 uΩ | I = 4 uA. |

Ohm's Law - 2 kΩ, 9 kA | E = 18 kV |

Ohm's Law - 7 mA, 84 mV | R = 12 mΩ |

An example of a compound: | H2O. |

What is considered a semiconductor? | Gallium, Silicon. |

If you have a current of 20 microamperes and a resistance of 30 microhms, what would be your voltage? | E = 600 uV. |

If you have 150 uV and current is 30 uA, what is the resistance? | R = 5 uΩ. |

If you have 270 uV and resistance is 90 uΩ , what is the current? | I = 3 uA. |

14 mm / 30 mm/s = | Time Constant .46 |

S = 5uV/mm, D = 10mm | V = 50uV |

V = 175uV/mm, D = 25mm | S = 7uV/mm |

V = 100uV, S = 7uv/mm | D = 14.28mm |

D = 15mm, S = 15uV/mm | V = 225vV/mm |

S = 20uV, V = 60uV | D = 3mm |

D = 1.66mm, S = 30vU/mm | V = 50uV |

D = 142.8mSec | F = 7Hz |

F = 12.5Hz | D = 80mSec |

D = 250mSec | F = 4 Hz |

F = 15Hz | D = 66.6mSec |

P.S. 25mm/sec, A 3mm, D = | 120msec |

P.S. 25mm/sec, A 3mm, F = | 8.33Hz |

P.S. 25mm/sec, V 20uV, A 4mm, S = | 80uV/mm |

P.S. 25mm/sec, A = 8mm, D= | 320msec |

P.S. 25mm/sec, A 8mm, F = | 3.125Hz |

P.S. 25mm/sec, V 20uV, A 18mm or 18mm, S = | 360uV |

Pen Deflection %: Damping = 1mm, Deflection = 9mm | 11% Damping |

Pen Deflection %: Damping = .8mm, Deflection = 8.5mm | 9% Damping |

Pen Deflection %: Damping = 1.2mm, Deflection = 7.9mm | 15% Damping |

Pen Deflection %: Damping = 0mm, Deflection = 8.5mm | 0% Damping |

Pen Deflection %: Damping = .8mm, Deflection = 8mm | 10% Damping |

Pen Deflection %: Damping = 1mm, Deflection = 8mm | 12.5% Damping |

Pen Deflection %: Damping = .5mm, Deflection = 8mm | 6.25% Damping |

Pen Deflection %: Damping = .8mm, Deflection = 5.5mm | 14.4% Damping |

Pen Deflection %: Damping = .5mm, Deflection = 8mm | 6% Damping |

Pen Deflection %: Damping = .9mm, Deflection = 8mm | 11% Damping |

Pen Deflection %: Damping = 1.1mm, Deflection = 8mm | 13.75% Damping |

Pen Deflection %: Damping = .9mm, Deflection = 8mm | 11.25% Damping |

Pen Deflection %: Damping = 1.8mm, Deflection = 8.2mm | 22% Damping |

Settings: P.S. 60 mm/s, Sensitivity 7 uV/mm, HF 70 Hz, LFF 1 Hz. If a wave measures 12 mm peak to peak, what is the voltage? | 84 uV. |

If the frequency of a wave is 8 Hz, what is the duration? | 125 msecs. |

If the distance between C3 and CZ in the coronal plane is 6.5 cm, what is the distance between the left pre-auricular crease and T3? | 3.25 cm. |

What class of drugs are most effective in the tx of SE? | Barbituates. |

Which type of electrodes are considered invasive? | T1 & T2. |

Post HV anterior slowing longer than 2 mins... | Is abnormal. |

The circumference is 56 cm. The center mark in the back of the head will be placed at... | 28 cm. |

LIO-A1 and FP1-A1 - What will the phase look like looking up? | Phase Opposition: Input I (-), Input II (+). |

LIO-A1 and FP1-A1 - What will the phase look like looking down? | Phase Reversal: Input I (+), Input II (-). |

LIO-A1 and FP1-A1 - What will the phase look like looking left? | Both channels negative up (-). |

LIO-A1 and FP1-A1 - What will the phase look like looking right? | Both channels negative down (+). |

What is the direction of the pen and the voltage if Grid 1 = 50uV and Grid 2 = 70uV? | Up, 120 uV. |

The distance between C3 and Cz in the coronal plane is 7.5 cm. What is the distance between the left pre-auricular crease and T3? | 3 cm. |

Ohm's Law: R = | E/I |

Ohm's Law: E/R = | I |

Ohm's Law: E = | IR |

Power/Watts: (2=squared)/R = | P |

18 V, 3 Ohms | I= 3 Amps |

6 Amps, 18 Volts | P= 108 Watts |

36 Volts, 3 Ohms | P= 12 Amps |

12 Amps, 36 Volts | P= 432 Watts |

10/20: 61 @90% | 54.9 |

10/20: 51 @20% | 10.2 |

10/20: 46 @70% | 27.6 |

10/20: 37 @90% | 34.2 |

10/20: 41 @20% | 8.2 |

10/20: 69 @70% | 41.4 |

10/20: 71 @70% | 35.0 |

10/20: 44 @20% | 8.8 |

10/20: 57 @20% | 11.4 |

10/20: 49 @70% | 29.4 |

10/20: 63 @70% | 37.8 |

TC of .32 = | LFF of -5 |

LFF of 1 Hz = | TC of .16 |