auditory systems and Oculomotor System

1. What is the role of end-stopping in predictive coding within the visual system?

• a) End-stopping enhances activity in lower-level visual areas.

• b) Longer bars activate higher-level representations, which amplify lower-level activity.

• c) End-stopping reduces activity in higher-level visual areas.

• d) Longer bars predict responses at smaller scales, suppressing lower-level activity.

2. Which of the following describes the function of forward-projecting error-coding units in the visual cortex?

• a) They enhance the activity in lower-level visual areas.

• b) They predict sensory consequences of actions.

• c) They exhibit end-stopping phenomena.

• d) They reduce activity in higher-level areas.

3. What was observed in the experiment by Murray et al. (2002) regarding the activation between V1 and LOC areas?

• a) Activation in V1 increases activity in LOC.

• b) Activation in LOC decreases activity in V1.

• c) Activation in V1 decreases activity in LOC.

• d) Activation in LOC has no effect on V1.

4. How do re-afference and efference copy contribute to the perception of self-administered tactile stimulation?

• a) Re-afference enhances ticklishness, while efference copy suppresses it.

• b) Both re-afference and efference copy contribute equally to ticklishness.

• c) Efference copy enhances ticklishness, while re-afference suppresses it.

• d) Re-afference and efference copy have no effect on ticklishness.

5. In the specific prediction experiment by Blakemore et al. (2000), what was the result when there was a mismatch between the subject's motion and tactile stimulus?

• a) Ticklishness decreased with the mismatch.

• b) Ticklishness increased with the mismatch.

• c) There was no effect on ticklishness.

• d) Ticklishness disappeared completely.

6. In the mouse experiment by Keller et al. (2012), what was observed regarding neural activity in the primary visual cortex?

• a) Neural activity was not affected by any mismatch between running activity and visual feedback.

• b) Neural activity in primary visual cortex was only affected by actual sensory input.

• c) Neural activity was affected by the mismatch between predicted and actual sensory information.

• d) There was no change in neural activity regardless of the mismatch.

7. What distinguishes the responses of MST neurons from MT neurons in differentiating self-induced image motion?

• a) MST responses mostly reflect retinal image motion, while MT responses represent true motion in the external world.

• b) MT responses access both retinal and eye velocity information, while MST responses mostly reflect retinal image motion.

• c) Both MST and MT responses primarily rely on retinal image motion.

• d) MST responses represent true motion in the external world, while MT responses access both retinal and eye velocity information.

Which of the following statements best reflects the implications of the experiment by Keller et al. (2012) on predictive coding in the auditory system?

• a) The experiment demonstrates that sensory areas always receive signals reflecting accurate predictions of sensory consequences.

• b) Keller et al.'s findings suggest that predictive coding is a universal mechanism across sensory modalities.

• c) The results indicate that neural activity in the primary visual cortex is influenced solely by actual sensory input, not by predictions.

• d) Keller et al.'s study provides evidence supporting the idea that sensory areas receive signals reflecting the difference between predicted and actual sensory information.

Consider the implications of the foot tickling study mentioned in the material. How does the study contribute to our understanding of the roles of re-afference and efference copy in sensory processing?

• a) The study suggests that efference copy alone is responsible for suppressing the perception of self-administered tactile stimulation.

• b) It highlights the importance of re-afference in enhancing the perception of self-induced tactile stimulation.

• c) Both re-afference and efference copy contribute to the perception of self-induced tactile stimulation, with efference copy playing a dominant role.

• d) The study concludes that neither re-afference nor efference copy significantly influences the perception of self-induced tactile stimulation.

In the context of sensory processing, how does the concept of end-stopping challenge traditional views of hierarchical processing in the brain?

• a) End-stopping suggests that higher-level brain areas always enhance activity in lower-level areas.

• b) It challenges the idea that sensory information is processed hierarchically from lower to higher brain areas.

• c) End-stopping supports the notion that sensory processing occurs independently in different brain regions.

• d) The concept of end-stopping confirms that sensory information is processed hierarchically, but in a bottom-up manner.