Psyc 001 Week 6

Quiz 4

• Please clear your desk of everything except for a pen or pencil and a piece of paper.

• No talking or use of cell phones or electronics.

• Write your name, section number (or section time), and date on the piece of paper.

1. The sensory homunculus...a) represents the time it takes to process information

from each part of the bodyb) represents the space in the somatosensory cortex

devoted to each part of the bodyc) represents the visual worldd) represents the amount of time we use each body part

2. What does the Sodium/Potassium pump do?e) Moves 3 sodiums in and 2 potassiums outf) Moves 2 sodiums in and 3 potassiums outg) Moves 2 sodiums out and 3 potassiums inh) Moves 3 sodiums out and 2 potassiums in

3. What recovery would you see in a child who has had a brain lesion?a) Good, the plasticity of the brain is very effective in young

childhoodb) Poor, the brain is not plasticc) None it would most likely cause deathd) Excellent, there is very little recovery time and they will

always be perfectly normal4. Which of these does NOT measure brain activity?

e) EEGf) PETg) MRIh) fMRI

5. What is neural plasticity?a) Ability of a neural cell to change the shape of its

somab) Ability of neural circuits to changec) Inability to create new neuronsd) Stabilization of neural circuits (no change)

6. Which lobe contains the auditory cortex?e) Frontal lobef) Parietal lobeg) Temporal lobeh) Occipital lobe

7. What does the corpus callosum look like? (taken from the movie on Wednesday)a) white/cream strip spanning into both the left and right

hemispheresb) red/pink strip spanning into both the left and right

hemispheresc) white/cream strip spanning the prefrontal cortexd) red/pink strip spanning the prefrontal cortex

8. Which has the larger representation on the somatosensory homunculus?

e) lipsf) ankleg) backh) shoulder

9. An adult has the same neural plasticity as a child.a) trueb) false

10. When identifying a lesion a physician would use a structural brain scan.c) trued) false

Sodium/Potassium Pump

• http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_the_sodium_potassium_pump_works.html

• What does the Na+/K+ pump do?– After an AP it moves the Na+ and K+ back to their

original sides of the cell wall

Brain Structure vs Function

Structure• Documents the physical

structure of the brain– MRI– CT

Function• Documents changes in the

brain during different activities– fMRI– EEG– PET

• As a physician when would you want to look at structure? Function?

• As a researcher when would you want to look at structure? Function?

Auditory Cortex

• Map of pitches in the auditory cortex (carried over from the cochlea)

Somatosensory Cortex

• What is implicated by different sized representations in the cortex?

Neural Plasticity

• What is neural plasticity?– It’s the ability of neural circuitry to change

• What does it look like?– Memory– Learning

• http://www.ted.com/talks/michael_merzenich_on_the_elastic_brain.html