M284 Principles of Neuroimaging Quiz

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The purpose of this quiz is to understand the skill level of the students as a whole in this class and, if necessary, to identify people who may need additional background. It is not part of your grade. The questions are typical of what you should expect to be able to do throughout the term. For (my) convenience, it is mostly multiple choice. READ CAREFULLY – Some questions have multiple parts.

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1. The typical resting membrane potential of a neuron, referred to the extracellular fluid, is about:

1 point

40mV

40 uV

2 uA

-70 mV

-70 mA

100 mM

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2. Which formulas describe the relationship between current and voltage in the circuit below?

2 points

vL =L di/dt

i =C dvL/dt

vR =–iR

vL(t) = e(–t/RL) + v0

3. If y=3x2+ 6x + 2, find dy/dx.

1 point

x^3+ (x^2)/3 + 2x + C

6x +6

Indeterminate – cannot be solved in closed form

–3 ± (24)^(0.5/6)

None of the above

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4. Which graph represents the relationship between s and t where s = exp(-t/2):

1 point

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5. What is the inverse of this matrix?

1 point

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6. Integrate to solve for y:

1 point

9/4

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7. In a random sample of the height of UCLA students, the following data were obtained:

a. What is the modal height of the males in this sample?

1 point

Clear selection

b. What is the difference in mean height between males and females?

1 point

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c. Which of the following should be used to test if the average height of UCLA males and females are significantly different (at p < 0.01)? Check all that are correct.

2 points

Increase the number of females in the sample by eight, then perform a t-test on the means.

Continue collecting data at UCLA until the probability of a two-tailed t-statistic comparing the heights of males and females is less than 0.01.

Collect the height data from all males and females at UCLA, then use a t-test to determine if the heights differ at the assigned probability level.

Collect height data from an age matched population from the surrounding community.

Add to the sample until there are exactly 100 males and 100 females, and determine if the average heights differ by more than 1 inch.

None of the above.

8. Neuroanatomy:

a. Match the anatomical terms to the indicated brain regions; place the letter in the corresponding box. N.B., not all boxes are named, and some names match multiple boxes.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

Not Labeled

Superior Parietal Lobule

Pons

M1 - Primary Motor Cortex

Thalamus

Middle Temporal Gyrus

A1- Primary auditory cortex

Wernicke's Area

Inferior Frontal Gyrus

Clear selection

b. Identify all structures that all part of the limbic system.

Superior Parietal Lobule

Pons

M1 - Primar Motor Cortex

Thalamus

Middle Temporal Gyrus

A1 - Primary Auditory Cortex

Wernicke's Area

Inferior Frontal Gyrus

9. Write a short program in the space below (in any computer/ing language) that will print the letters of a word in reverse order.

Please identify which programming language you used in your answer.

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