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Quiz 3 >> Answers
Biopsychology: Answers to Quiz 3
1.
"What you see is not necessarily what you get." Briefly explain what this means, and very briefly provide two pieces of supporting evidence.
Answer:
Visual perceptions are often different from the visual input, e.g., Contrast enhancement: among intensely illuminated receptors, the one at the edge fires more; among less-illuminated receptors, the one on the edge fires less (Mach bands - non-existent bright and dark stripes seen at edges). Visual completion: information from the receptors around the blind spot used to fill gaps in retinal images.
2.
Analgesia seems to be mediated by endogenous opiate activity in the __________ and ____________ activity in the ___________ nuclei.
Answer:
1. periaqueductal gray
2. serotonergic neural
3. raphe
3.
After entering the _______ eye, light from the _______ visual field stimulates the left temporal hemiretina, and the resulting signals are projected directly to the _______ primary visual cortex.
Answer:
1. left
2. right
3. left
4.
Feedback plays an important roll in guiding all movements, with the exception of __________ movements.
Answer: ballistic
5.
Which two terms do not belong in this group?
1. cingulate motor areas
2. supplementary motor areas
3. medial geniculate
4. lateral lemniscus
5. red nucleus
6. medullary pyramid
7. Renshaw cells
Answer: medial geniculate and lateral lemniscus
6.
Photopic is to scotopic as 560 is to _______.
Answer: 500
7.
The ______________ phenomenon demonstrates the important role of visual attention: If we don't attend to an object, we don't ________ it, even for a few seconds.
Answer:
1. change blindness
2. remember
8.
The numbers VII, IX, and X are linked to the __________ system.
Answer: gustatory
9.
Most people believe that the colour of an object depends entirely on the wave lengths of light that it reflects, but this common way of thinking cannot account for the main feature of colour vision: ______________.
Answer: colour consistency
10.
Large homogeneous areas are not directly perceived by the visual system; they are product of ___________.
Answer: surface interpolation
11.
In neuroanatomy, 'rubro' refers to the _____________.
Answer: red nucleus
12.
The main function of the ______ pairs of superior olives appears to be sound ____________.
Answer:
1. two
2. localization
13.
Migraine attacks are often preceded by ______________.
Answer: fortification illusions
14.
The bottom two layers of the ______________ are referred to the _____________ layers, and the neurons there are particularly sensitive to ____________.
Answer:
1. lateral geniculate nucleus
2. magnocellular (M)
3. movement
15.
Our ability to move our fingers independently depends on the integrity of the _____________ tract.
Answer: dorsolateral corticospinal
16.
How do we get our central sensorimotor programmes?
Answer:
Practising the behaviours - response chunking: programmes control chunks of behaviour, not individual responses - control over actions shifts to lower levels 2. Without practice (many species-specific behaviours) - mice raised without forelimbs still make mice-characteristic grooming moves.
17.
Although __________ is usually produced by left parietal damage, its clinical effects are bilateral.
Answer: apraxia
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